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Central Bank of Oman
Central Bank of Oman
Alternative Site at KOM, Muscat
Volume IV
Architectural Specification
May 2011
Central Bank of Oman
Central Bank of Oman
Alternative Site at KOM, Muscat
Volume IV
Architectural Specification
May 2011
Report no. 210206
Issue no. 0
Date of issue May 2011
Prepared HMB
Checked SVHK
Approved NIBU
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Table of Contents
1 General Information 6
1.1 Project Details 6
1.2 Associated Contracts 7
1.3 General Requirements 7
1.4 ‘As-Built’ Drawings and Information to be provided 11
1.5 Manufacturers’ Data 12
1.6 Site Meetings 13
1.7 Warranties & Guarantees 14
1.8 Manufacturer’s Recommended Spares 15
1.9 Substantial Completion and Handover 15
1.10 Period of Maintenance 19
2 Plasterwork and Floor Screeds 21
2.1 General 21
2.2 Materials 22
2.3 Execution 23
3 Membrane Roofing 29
3.1 General 29
3.2 Materials 30
3.3 Execution 32
3.4 Protection 34
4 Carpentry and Joinery 35
4.1 General 35
4.2 Materials 36
4.3 Execution 39
5 Metal Doors 46
5.1 General 46
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5.2 Materials 47
5.3 Execution 47
6 Wooden Doors 49
6.1 General 49
6.2 Materials - Doors 50
6.3 Execution - Doors 52
7 Aluminium Doors & Windows 54
7.1 General 54
7.2 Relevant standards 54
7.3 Materials and Performance 55
7.4 Execution 57
7.5 Automatic doors 58
8 Ironmongery 59
8.1 General 59
8.2 Materials 60
8.3 Execution 60
9 Glazing 62
9.1 General 62
9.2 Materials 62
9.3 Execution 64
9.4 Structural Glazing 68
10 Ceramic Tiling 69
10.1 General 69
10.2 Materials 70
10.3 Execution 72
10.4 Special Requirements 76
11 Hard Floor Tiling 77
11.1 General 77
11.2 Materials 77
11.3 Execution 79
12 Concrete/Screed Hardener 81
12.1 General 81
12.2 Materials 81
12.3 Execution 82
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13 Suspended Ceilings 83
13.1 General 83
13.2 Materials 84
13.3 Execution 86
14 Raised Access Flooring 89
14.1 General 89
14.2 Materials 89
14.3 Installation 90
14.4 Inspection and Testing 91
15 Demountable Partitions 92
15.1 Scope of Work 92
15.2 Standards 92
15.3 Submittals 92
15.4 Materials 92
15.5 Installation 93
16 Painting 94
16.1 General 94
16.2 Materials 96
16.3 Execution 98
17 Carpeting 104
17.1 General 104
17.2 Materials 105
17.3 Execution 106
18 Stone Cladding 108
18.1 General 108
18.2 Materials 108
18.3 Execution 109
19 Metal Cladding 111
19.1 General 111
19.2 Material 111
19.3 Execution 112
20 Joints, Sealants and Joint Covers 113
20.1 General 113
20.2 Materials 113
20.3 Execution 114
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21 Sanitary Ware 116
21.1 General 116
21.2 Materials 116
21.3 Fixing 116
21.4 Sealant 117
21.5 Protection 117
21.6 Inspection and Testing 117
22 Wall Guard Systems 118
22.1 General 118
22.2 System Description 118
22.3 Submittals 119
22.4 Manufacturer 119
22.5 Execution 120
23 External Work – Ground Finishes 122
23.1 Scope 122
23.2 General 122
23.3 Materials 124
23.4 Pre-cast Concrete Paving Blocks 127
23.5 Workmanship 131
24 Flood Gates 136
24.1 Scope 136
24.2 General 136
24.3 Products 139
24.4 Execution 141
25 Vertical Transportation Systems 144
25.1 Passenger Lifts and Goods Lift 144
25.2 Execution 175
26 Asphalt Paving 178
26.1 General 178
26.2 Asphalt Paving 178
26.3 Concrete Kerbs 178
27 Through Coloured Render 181
28 Carpets 183
28.1 General 183
28.2 Materials 184
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28.3 Execution 184
29 Flagpoles and Flags 186
29.1 General 186
29.2 Materials 186
29.3 Execution 186
30 Carpark shades 187
30.1 General 187
30.2 Materials 187
30.3 Execution 187
31 Epoxy Resin Flooring 188
31.1 General 188
31.2 Material 188
31.3 Preparation Of Substrates 189
31.4 Laying Flooring 190
32 Anti- Static Vinyl Tiles 192
32.1 General 192
32.2 Material 192
32.3 Laying Flooring 193
33 Porcelain Tiles 194
33.1 General 194
33.2 Material 194
33.3 Execution 196
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1 General Information
1.1 Project Details
1.1.1 General
The project comprises of the following works:
• Construction of new Office Building comprising of 6 floors (Basement,
Ground floor, 4 typical floors) in accordance with the drawings and
specifications.
• The construction of the basement raft and the retaining walls all around
along with the access ramp and the water tank structure have been
constructed in package .
• Construction of Security Buildings, ETS building and fenced
compound with services buildings.
• Construction of external works including boundary wall – partly K4
rated, parking and access roads, etc.
• Modification to existing road around the plot for entry and exits.
1.1.2 Location
The project site is located within the premises of Knowledge Oasis Muscat at
Al Khod Seeb.
1.1.3 Site Conditions
A copy of the Site Investigation Report is available for review at the Engineer’s
office. It is a requirement that all Tenderers shall read the report and acquaint
themselves fully with its contents. No consideration shall be given to any
claims arising from non-acquaintance of the site conditions.
The Main Contractor will be responsible for all making-up of ground to
finished levels where required including compaction and testing of the made up
ground.
The principal foundation system for the building will be concrete, bored cast-
in-situ pile foundations under the columns in accordance with the
recommendations of the Site Investigation Report and strip foundations or
ground slab thickening under the walls.
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All foundations and basements are to be protected as shown on the drawings.
All basement areas are to be fully tanked as detailed on the drawings.
1.2 Associated Contracts
The present tender includes the general construction work, complete with most
finishes, fittings and electro-mechanical engineering installations, specialist
security and Data Centre requirements and associated external work.
1.3 General Requirements
The following contains a description of general requirements to be part of the
scope of work.
These works shall be deemed to be included in the Contractor’s Preliminaries.
1.3.1 Signboards
Supply and fix project sign board(s) in compliance with the requirements of
KoM at the entrance to the site. Prepare layout sketch for the Engineer’s
approval prior to fabrication and erection.
1.3.2 Notices and Permits
It is the Contractor’s responsibility to obtain all Authority approval/permits
required for the execution of the entire project work.
1.3.3 Use of the Site
The work shall be carried out to cause minimum disturbance to the operation of
the adjacent roads and adjoining buildings. The Contractor shall within one
week from the Instructions to Commence submit a site plan including all site
facilities, stores, cranes and stationary equipment for the Engineer’s approval.
1.3.4 Consultant’s Site Facilities
Provide site facilities for the Consultant in accordance with the schedule in the
preliminaries section and Appendix A hereto. The site facilities shall be
maintained and serviced for the duration of the project.
1.3.5 Record Photographs
The Contractor shall provide progress photos, on a monthly basis. Three sets of
photos shall be submitted monthly and shall remain the sole property of the
Client.
The Contractor shall not use any photos for other purposes without the Client’s
written consent.
The Contractor should note that photography in the area is strictly controlled
and that improper use of cameras could lead to difficulties with the Security
Forces.
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1.3.6 Contractor’s Supervision
The Contractor shall provide a suitable supervision team full time on site. The
Contractor’s Engineers shall have relevant successful experience from similar
projects.
Qualifications and experience details of the main members of the team are to be
submitted with the tender for the Engineer’s approval, and interviews with the
Engineer are to be conducted prior to approval of any staff.
1.3.7 Standard of Workmanship & Materials
All work shall be executed with the best workmanship and to accepted standard
practices. Relevant British Standards and other Codes of Practice shall be
followed unless otherwise indicated in accompanying drawings/specifications
or where otherwise directed by the Engineer.
Reference to British Standards which shall refer to the edition current at the
time, shall not preclude the use of materials from sources where other standards
apply, but no materials to be incorporated in the works shall be in any respect
inferior to those which specifically comply with the British Standard. Should
the Engineer discover on the works any material other than those approved, he
may order their removal from the site, including the demolition of any works
already built with these materials.
All proprietary materials incorporated in the works shall be fixed or applied
strictly in accordance with the Manufacturer’s instructions.
Where proprietary materials are referred to in this specification the intention is
to establish the type and quality of materials required. Similar materials of
equal and alternative manufacture may be offered in substitution, for approval
by the Engineer. The Engineer has no obligation to approve the alternatives
offered by the Contractor.
All materials to be used in the permanent works shall be stored on racks or
supports, in bins, under cover etc. as appropriate to prevent deterioration or
damage from any cause whatsoever. Storage arrangements for specific
materials shall be as approved by the Engineer.
Where materials, products and workmanship are not fully specified, they shall
be suitable for the purpose of the works stated in or reasonably to be inferred
from the Contract Documents, and in accordance with good building practice,
to the satisfaction of the Engineer.
Approval of all products or materials specified is required. The Contractor shall
submit samples or other evidence of suitability to the Engineer at least 21 days
before the approval is required. The Contractor shall not confirm orders or use
materials until approval has been obtained. Delays due to non-submission of
samples or inadequate support literature shall be the sole responsibility of the
Contractor.
Approved samples shall be retained on site for comparison with products and
materials used in the works and shall only be removed when no longer required
by the Engineer.
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Where samples of finished work are specified, the Contractor shall obtain
approval of stated characteristics before proceeding with the works and shall
retain approved samples on site for comparison with the works. Samples which
are not part of the finished works shall be removed when no longer required by
the Engineer.
1.3.8 Inspection and Testing
Whenever considered desirable the Engineer or his representative may visit the
source of supply or Manufacturer’s work areas to test the materials or supervise
their production. Materials shall be tested before leaving the supplier’s
premises or Manufacturer’s works as well as after delivery to the works.
The Contractor shall allow reasonable time for the Engineer to make
arrangements for inspection and give permission for dispatch to the site. Delay
to the works arising from late notification of such details will not be accepted
as reason for delay in completion of the works.
All Manufacturer’s certificates of tests, proof sheets, mill sheets etc. (in English
language) showing that the materials have been tested in accordance with the
requirements of the appropriate British Standards, other relevant standard or
this specification, shall be supplied free of charge, if required by the Engineer.
1.3.9 Working Drawings (Shop Drawings)
1.3.9.1General Requirements
Prepare working drawings for all services, assemblies and pre-cast/fabricated
components in accordance with this section and relevant sections of the
Services Specification.
Submit to the Engineer for approval four copies of all working details and
drawings and also supply two copies for the use of the Employer and other
interested parties.
These drawings must be submitted as soon as possible after the contract is
awarded to give ample time for all concerned to study and comment thereon
prior to the programmed commencement date for the related works.
Latest submission shall be 3 weeks before commencement date for the work.
Carefully check the work described on working drawings for all clearances,
field conditions, maintenance of architectural conditions and proper co-
ordination with all trades on the job. To this end, during production drawing
stage, co-ordinate drawings of all other trades that might interfere with the
proper installation of the work.
Any unresolved conflict between trades shall be referred to the Engineer.
1.3.9.2 Details to be shown
Services and equipment layouts shall be detailed on the drawings, showing the
exact method of installation and clearly illustrating components to be used in
making of all connections.
Site layout drawings shall be drawn to a scale of 1:200.
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General layout drawings shall be drawn to 1:50 scale, unless agreed otherwise
with the Engineer. Toilet piping layout, details and hangers, cleanouts,
distribution boards, power and control panels, methods of fixing of all
equipment, including pipes and conduits, detailed cross sections of service
ducts, etc. are to be drawn to 1:10 scale.
Prepare schedules and drawings showing precise details of holes in concrete,
block work, etc. bases, frames or support required and the like. The schedules
shall show in-detail the builder’s work required to be performed by all other
trades for the services installations.
These drawings and schedules, in an approved form, must be submitted to and
properly approved by the Engineer before any structural work requiring holes
or other modifications is constructed.
1.3.9.3 Approval Procedures
Submit all drawings as prescribed hereunder. All drawings submitted for
approval shall be supplied in the form of prints and signed by a principal of the
Contract. After approval, the negatives will be signed by the Engineer and
returned to the Contractor who shall then provide four sets of prints to the Engi-
neer.
Signed and approved drawings will not be departed from unless a signed
variation or omission certificate is issued in writing by the Engineer. Drawings
returned to the Contractor for alteration or amendment shall be re-submitted to
the Engineer for approval.
Amended or altered drawings shall show the nature of the amendment or
alteration in a revision block on the drawing, together with the revision number
or letter and the date of the revision.
The Engineer’s approval of working details and drawings will not relieve the
Contractor of his responsibility for errors and incorrect setting out. The
Engineer’s approval is only general and not intended to serve as a check and
does not relieve the Contractor from furnishing the materials and performing
the works as required by the Drawings and Specifications.
Should the Contractor prove to be unable to produce satisfactory “Working
Drawings” or be unable to produce drawings to conform to the progress of the
work, the Engineer reserves the right to take whatever steps are necessary to
have drawings undertaken by others and debit the cost of the same to the
Contractor’s account.
Any decision taken by the Engineer to have working drawings produced
elsewhere will not relieve the Contractor of his contractual obligations and the
Contractor must provide to the Engineer all necessary details, physical
dimensions, descriptive literature, etc. of all equipment to be incorporated on
drawings within 10 days of a request from the Engineer.
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1.4 ‘As-Built’ Drawings and Information to be provided
1.4.1 General Requirements
Arrange to keep on site a full set of drawings showing the progress of the
Works, which must be kept up-to-date.
Keep a record as the work proceeds of any work installed not in accordance
with the drawings.
Upon completion of the Works, prepare a completely new set of drawings for
the work as executed and submit same in duplicate to the Engineer. Submit two
sets of diskettes (AutoCAD), and two copies of all drawings duly marked ‘As-
Built’ clearly defining all locations, depths, shapes and dimensions of all
permanent works executed. These shall include, but not necessarily be limited
to Architectural, Structural, all Services and purpose-made components and
assemblies.
The words “AS BUILT” shall be clearly indicated on all drawings adjacent to
the title block. Each set of prints shall be bound into the Operation and
Maintenance (O & M) manuals, with each drawing separately folded and
contained in plastic sleeves.
There will be no entitlement for any extra payment or extension of time for the
correction, preparation and supplying of the above mentioned drawings and
information. The completion certificate for the work will not be issued until the
Service Manuals and ‘As-Built’ Drawings are approved.
1.4.2 Service Requirements
For Mechanical and Electrical plant and equipment, provide the following
information to be incorporated in the O & M manuals:-
1. Detailed Design Conditions & Criteria and schedules of the Plant as
actually installed.
2. Instructions for the Maintenance and Overhaul of the Plant installed.
3. Recommendations for consumable supplies, e.g. packings, lubricants, etc. for
the Plant installed.
4. Drawings showing the internal construction of the major items, with parts
listed and reference numbers for ordering spares.
5. Complete assembly drawings of machinery and ancillary plant showing all
pipe connections and fittings.
6. General arrangement drawings showing all equipment, cabling, tray-work, etc.
7. Detailed arrangement of any conduit work buried in floors, walls or
ceilings, in any buildings or concrete works.
8. Detailed wiring diagrams of the main circuits.
9. Diagrams of connections between all items of equipment (e.g. main and
auxiliary switchboards, motors, starters, batteries, meters, instruments,
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relays, electronic and allied equipment, etc., with component values and
types suitably marked thereon).
There will be no entitlement for any extra payment or extension of time for the
correction, preparation and supplying of the above mentioned drawings and
information. The completion certificate shall not be issued until all service
manuals and ‘As-Built’ Drawings are approved.
1.5 Manufacturers’ Data
Manufacturers’ performance data and certified factory drawings of apparatus,
giving full information as to capacity, dimensions, materials and all information
pertinent to the adequacy of materials and equipment shall be submitted for
approval.
Manufacturer names, sizes, catalogue numbers and/or samples of all materials
shall be submitted for approval.
Submittals and working drawings should, as far as possible be complementary
so that drawings and submittals can be cross-checked.
Ordering details of material submitted for approval must be accompanied by
relevant drawings, technical data, catalogues and samples. Where data certified
drawings or other required information is not available until after orders have
been placed, the Engineer will give provisional approval conditional on all
requested drawings and information being supplied to the Engineer found to be
acceptable by him.
Ensure that all necessary information is supplied to the Engineer in accordance
with the progress of the work.
1.5.1 Preliminary Programme (Clause 14)
A preliminary outline programme for carrying out the works shall be prepared
by the Contractor and submitted with the Tender. Within 14 days after the
acceptance of the Tender, prepare a final programme for carrying out the works
and submit copies of the programme to the Engineer for approval.
The programme shall be sufficiently detailed to show in itemised graphic bar
chart form all trades and activities necessary for the completion of the structural
works. The programme shall identify a “critical path” of activities essential for
timely completion of the works which shall define the earliest and latest
possible dates for commencement and completion of each activity.
1.5.2 Detail Programme (Clause 14)
The final programme shall be prepared by the Contractor and submitted within
six weeks after acceptance of the Tender. It shall be accompanied by a
comprehensive materials ordering schedule showing latest dates for approval of
proposed materials in order to meet the requirements of the programme.
Allow at least six weeks for review and approval of material approval
submittals: on no account will delays to the work be accepted where caused by
failure to obtain approvals of materials from the Engineer.
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The material ordering schedule shall list the following information:
i. Schedule of Rates/Bills of Quantities reference.
ii. Material Description.
iii. Approval Date (Programme).
iv. Approval Status.
v. Ordering Date (Programme).
vi. Ordering Status.
vii. Delivery Date (Programme).
viii. Delivery Status.
ix. Installation Dates (Programme).
x. Installation Status.
The preliminary and detail programmes shall be accompanied by details of
labour force monthly loadings for each trade, including subcontractors and
supervisory staff.
The Working Programme shall show the periods for installation, inspection,
testing and commissioning the electrical and mechanical plant and equipment,
and periods allocated for general snagging and rectification of defects.
Programme to be prepared and submitted within 2 weeks.
Allow at least 1 (one) week for review and approval of Material Approval
Submittal.
1.5.3 Programme Priorities
The programme of works shall include the following works as immediate
priorities at the outset of the construction period:
A site survey and preparation of site survey drawing at 1:200 scale to verify the
information on the site survey drawing included in the tender documents.
1.5.3.1 Establishment of Acceptance Standards
Where there are a number of similar rooms or similar elements in the project,
then one of these rooms or other elements should be selected to be completed in
advance of others in order that the standard of finish, or any other matter, may
be commented upon. Thereby, a standard is to be set on which future
inspections of similar rooms or similar elements will be based. Such areas
should be programmed separately.
1.5.4 Shop Drawing Production Programme
The detailed production programme shall be accompanied by a working
drawing production programme.
Submission of such programme shall not relieve the Contractor of any of his
duties or responsibilities under the Contract.
1.6 Site Meetings
Site meetings shall be held on a weekly basis or as otherwise directed by the
Engineer.
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Attend with adequate representation the site meetings and all other meetings to
which the Engineer has given instruction to attend.
Inform and present to attend meeting(s) representative(s) for sub-contractors,
suppliers, etc., if so requested by the Engineer.
The Engineer will chair the meeting and be responsible for the preparation and
distribution of Minutes.
Hold co-ordination meetings with sub-contractors two days prior to the Site
Meetings to ensure accurate reporting on progress, information, etc.
Submit the following information, in writing, one day prior to each site meeting:
i) Progress report showing percentage completion scheduled and actual
percentage completed for each activity of the programme.
ii) Plant and Labour reports for the month.
iii) Minutes of Contractor’s Co-ordination meeting.
iv) Schedule of Information requirements.
v) Updated Material Ordering Schedule
vi) Records of daily temperature, humidity and rain-fall
vii) Record of Site Instructions issued since previous meeting
viii) Record of Payments
ix) Estimates of anticipated variations and instructions if previously requested
by the Engineer.
1.7 Warranties & Guarantees
All equipment and installations supplied under a manufacturer’s warranty shall
be covered by warranty for the entire maintenance period and such additional
periods as outlined below.
The warranties are specifically required for the following elements:-
♦ Roof Waterproofing 10 years
♦ Anti-Termite Treatment 15 years
♦ Ironmongery 5 years
♦ Window & glazing installation 10 years
♦ Waterproofing membranes 10 years
♦ Chiller compressor and coating 5 years
♦ External Paint System 5 years
♦ Internal Paint System 5 years
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♦ Marble/tile finishes throughout
♦ Stone cladding fixing system
♦ External Metal Cladding system
10 years
10years
10years
Sample form of warranty shall be submitted with the tender. The final original
certificate shall be included in the O & M Manuals.
1.8 Manufacturer’s Recommended Spares
Provide all tools, keys etc. together with spare parts and consumable stores
sufficient for operating all services installations for a period of one year
commencing from the date of the Completion Certificate all in accordance with
manufacturer’s recommendations and the Engineer’s approval.
1.9 Substantial Completion and Handover
1.9.1 Definition
“Substantial Completion” is that stage in the execution of the work under the
Contract when:
• the Works or a separable part of the Works, as the case may be, are
complete except for minor omission and minor defects;
• which do not prevent the Works or that separable part of the Works from
being used for its intended purpose, and
• in relation to which the Engineer determines that the Contractor has
reasonable grounds for not promptly rectifying them, and
• rectification of which will not prejudice the convenient use of the Works
or of that separable part of the Works, and
• those tests which are required by the Contract to be carried out and
passed before the Works or the separable part of the Works, as the case
may be, are handed over to the Employer have been carried out,
documented and passed, and
• Such Documents and other information required under the Contract which,
in the opinion of the Engineer, are essential for the use, operation and
maintenance of the Works have been supplied. This includes As-Built
Drawings and Operation & Maintenance manuals.
1.9.2 Handover Programme
As the works approach substantial completion, submit to the Engineer a
programme outlining the main events leading up to the Final Handover Meeting to
ensure that the handover arrangements proceed efficiently.
The programme shall include the following events:-
1. Preliminary snagging by Contractor.
2. Preliminary snagging by Engineer/Contractor.
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3. Final snagging inspection by Engineer/Contractor.
4. Testing and commissioning of electrical and mechanical plant and
equipment on site.
5. Familiarization of Employer nominated operatives with the electrical and
mechanical equipment.
6. Substantial Completion Inspection of the Works by Employer/Engineer
including all required submissions of manuals, drawings, spare parts, etc.
7. Issue of the Certificate of Completion.
8. An inspection or series of inspections (as demanded by the size and nature of
the project) by Engineer and relevant technical experts to obtain clearance for
occupation of the Works by the Employer.
9. Final Handover Meeting at which the keys are handed over to the
Employer for occupation of the site.
1.9.3 Documentation for Testing and Commissioning
By the end of mobilization period, submit formats for the contents of all electrical
and mechanical Testing and Commissioning Schedules and the layout and contents
of all electrical and mechanical Testing and Commissioning Certificates. Testing
and Commissioning Certificates are to be signed by the Contractor and
countersigned as approved by the Engineer before issue. Certificates for electrical
installations in buildings are to be in accordance with the ‘IEE Regulations - 15th
Edition’.
The site commissioning and test results are to establish the optimum conditions for
plant and equipment and form the basis for future condition monitoring. After
items of electrical or mechanical plant or equipment have been tested and
commissioned copies of each of the following shall be bound into the O & M
Manuals:
1. Testing and Commissioning Certificates
2. Full site performance test result sheets and reports.
1.9.4 Familiarisation with the Works
Programme
The Client’s staff responsible for operation and maintenance of the works after
hand over, shall be given the opportunity of familiarization with the facilities
including the documentation (in particular for the mechanical and electrical
plant and equipment) in advance of the Handover Meeting.
The Project Programme shall include for this familiarization period.
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1.9.5 Demonstration of Plant and Equipment
Demonstrate the operation, regulation and general maintenance of the plant and
equipment and bear all costs relating to the familiarization (including the cost
of any specialist training for particular equipment).
1.9.6 Draft Documentation
The following draft submissions shall be provided as early as possible in the
construction period but no later than the scheduled time for familiarization with
the Works:
1. One set of the Operation and Maintenance Manuals.
2. One copy of the priced list of breakdown spares (together with any special
tools required) for one year operation and where appropriate also for five
years operation as recommended by the Manufacturer.
3. One copy of the priced list of consumable spares (e.g. filters) and other
consumables (e.g. chemicals for dosing water supply) for one year’s operation,
as recommended by the manufacturer.
4. One set of prints of the electrical and mechanical As-Built Drawings.
The Operation and Maintenance Manuals are required to describe the complete
working system. It will not be sufficient to submit only the manufacturer’s
literature for the component parts of the system, although such literature may
form part of the manual. The As-built Drawings must include the modified
infrastructure drawings where this is appropriate.
1.9.7 Submissions
Make the following submissions on or before the date of Substantial
Completion. The works shall not be considered Substantially Complete until all
of these submissions have been made (draft manuals are not acceptable at this
stage):
1. Three sets of the approved Operation and Maintenance Manuals. These
manuals are to include detailed descriptions of the operation of the system,
and are to explain the nature and frequency of the various routine
maintenance tasks.
These manuals must be suitable for use on site (i.e. plastic covers, based on
A4 size, capable of being laid flat when opened, fully indexed). One copy of
each of the approved Testing and Commissioning Certificates, site
performance test result sheets and reports, and the Testing and
Commissioning Schedules (as carried out) is to be included in each set of
manuals.
2. An additional set of manuals for specialist equipment shall be supplied for
the use of the specialist User.
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Additional copies of operating instructions for individual items of
equipment which can be adjusted by non-specialist users (room controls
for A/C’s, fire safety procedures etc.) shall be provided for each item of
equipment.
3. Three copies of the approved priced list of break-down spares (together
with any special tools required) for one year operation and where
appropriate also for five years operation.
4. One set of the breakdown spares (together with any special tools required) for
one year operation and where appropriate also for five years operation.
5. Three copies of the approved priced list of consumable spares and other
consumables for one year operation.
6. One set of the consumable spares and other consumables for one year’s
operation (actual delivery having due regard to shelf life where appropriate).
7. Three sets of the keys for all locks (including floor and ground master keys
where necessary), two sets of valve keys, and two sets of manhole cover
lifting keys.
8. Three sets of prints of all the approved As-Built Drawings (the electrical
and mechanical ‘As Built’ Drawings must be adequate for the operation
and maintenance of the facilities).
9. Two sets of copy transparencies of all the approved As-Built Drawings to a
standard suitable for photo reduction.
10. The original of all approved Testing and Commissioning Certificates (bearing
the signature of the Engineer who witnessed the tests).
11. Three copies of an Asset Register for all electrical and mechanical plant
and equipment requiring routine maintenance.
The Asset Register is to have the following items included in the schedules:
a) Item reference number - to be assigned by Employer.
b) Description
c) Rating
d) Manufacturer
e) Model number
f) Total quantity
g) Unit cost - FOB at the time of purchase
h) Purchase order no. - issued by the Contractor
i) Identification and location:
i. quantity at a given location or in a facility
ii. serial no. of the equipment where applicable
iii. tag number or title given to design on item or class of items (where applicable)
iv. location of facility
j) As-Built Drawing reference.
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1.9.8 List of Outstanding Work
a) Prepare three copies of the list of outstanding work. This list is to include
all items which are still outstanding at the date of Substantial Completion,
and which are to be finished by the Contractor during the Period of
Maintenance in accordance with the programme set by the Engineer.
Unless there is good reason for the contrary, it is expected that the
outstanding work would be satisfactorily completed within at least 28 days
of Substantial Completion.
b) The items on this list must be relatively minor items of outstanding work
or the making good of minor defects in the work already completed. Items
of plant and equipment, any other items where the full Period of
Maintenance is required, are not to be included on this list, but shall be
considered as work required to be completed before the issue of the
Certificate of Completion. However, this does not necessarily preclude the
certification of completion of stages as defined in Clause 48(2) of the
Conditions of Contract.
c) Attention is drawn to the amendments to the Standard Conditions of
Contract requiring the Engineer to set a programme for the completion of
the outstanding work and the remedy on the Contractor’s failure to carry
out such work within the set programme.
1.9.9 Completion by Stages
If there are any outstanding items of work of such a nature that a separate
Maintenance Period is required, such items shall be included on a list of
outstanding work, for each stage.
1.9.10 Final Handover Meeting
a) The final Handover Meeting is to enable the works to be handed over by
the Contractor to the Employer for occupation of the site. At this meeting
the keys are to be handed over to the Employer.
b) The Handover Meeting shall take place after all the necessary inspections
have been completed after issue of the Completion Certificate.
c) The following parties shall be represented at the meeting:
1) The Contractor
2) The Engineer
3) The Employer
1.10 Period of Maintenance
1.10.1 Division of Responsibilities
The Contractor’s responsibilities during the Period of Maintenance are clearly
defined in the Conditions of Contract. The Employer shall be responsible for
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routine maintenance and operation of the works, making good fair wear and tear,
and any repairs not considered to be the liability of the Contractor (e.g. damage to
the works by the User).
1.10.2 Rectification of Defects
a) The Engineer will inform the Contractor in writing of those minor defects
for which the Contractor is responsible for making good. Non urgent
repairs must be carried out within 10 days of notification to the Contractor
or, if this not possible, within a programme to be set by the Engineer.
b) Where there is not a need to have defects repaired immediately, then
depending on the number and importance of these defects, the Employer will
group them so that the Contractor is called back to the Site to carry out the
work as few times as possible. For most practical purposes it would be
satisfactory to clear the outstanding defects at (say) three monthly intervals.
Emergency repairs must be carried out immediately.
c) Keep a register of all requests showing the date of the request, and the date
on which the work was satisfactorily completed.
1.10.3 Inspection Prior to End of Maintenance Period
By approximately one month before the end of the Maintenance Period, all
outstanding items shall be completed, and a joint inspection will take place.
1.10.4 Notice by the Contractor
Inform the Engineer in writing as soon as all the outstanding defects have been
remedied and the works have been satisfactorily completed and maintained in
accordance with the Conditions of Contract.
The Engineer will inspect the works and reply confirming agreement or
pointing out any defects that have still to be remedied prior to issue of the
Maintenance Certificate.
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2 Plasterwork and Floor Screeds
2.1 General
2.1.1 Scope of Work
This section of the specification covers all internal and external plasterwork
including “render” and floor screeds.
The specification for roof screeds is included under section 7 - Membrane
Roofing.
2.1.2 Relevant British Standards
Conform to the recommendations made by the following British Standards
where applicable:
BS 12 : 1978 Ordinary and Rapid hardening Portland cement
BS 890 : 1972 Building limes
BS 5492 : 1990 Code of Practice for internal plastering.
BS 882 : 1992 Aggregate from natural sources for concrete
BS 1202 Specification for nails
BS 8000 : 1989, Part 9 Code of Practice for cement/sand, floor screeds
and concrete floor toppings.
BS 8000 : 1989, Part 10 Code of Practice for plasticizing and rendering
BS 1199 : 1976 Sands for external renderings and internal
plastering with lime and Portland cement.
BS 1369 : 1987 Metal lathing (steel) for plastering.
BS 4887 : 1986/87 Mortar admixtures
2.1.3 Co-ordination
Check and verify the positioning and fixing of all conduits or other similar
items which are to be concealed by either plaster or render or screed. Ensure
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that such items requiring testing have been satisfactorily tested and approved by
the Engineer before plasterwork is commenced.
2.1.4 Material Storage
All branded materials are to be delivered to the site in their original packages
bearing the trade names of the material concerned.
Cement, hydrated lime and similar materials shall be stored off the ground,
under cover and away from all possible source of damp.
Store sand under clean conditions to prevent contamination by soil or other
deleterious substances.
2.1.5 Shop Drawings
Submit shop drawings showing the position of all external wall render and
movement joints for the approval of the Engineer.
2.1.6 Literature and samples
In the case of proprietary products submit comprehensive technical literature
for the Engineer’s prior approval. When so requested by the Engineer, prepare
samples of plasterwork and/or render for his approval.
Samples to be a minimum of 10m2 in area for rendered surfaces and complete
at least 1m2 with the required finish.
2.2 Materials
2.2.1 Cement
Ordinary Portland cement complying with BS 12 : 1978
2.2.2 Lime
Comply with BS 890. Quicklime's to be slaked in a manner appropriate to their
type. Non-hydraulic and semi-hydraulic limes may be used dry or preferably
soaked to a putty 16 hours before use.
2.2.3 Sand for plastering/rendering
Comply with BS 1199. Sand to be hard, clean and free from deleterious matter
likely to affect adversely the hardening, strength, durability of appearance of
the plaster.
2.2.4 Fine aggregate (including sand) and coarse aggregate for screeds
Comply with BS 882.
2.2.5 Water
Clean potable water free from harmful matter and from any unusual proportion
of dissolved salts. Sea-water or brackish water shall not be used.
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2.2.6 Metal lath, corner/stop beads etc
Proprietary expanded aluminium or galvanised steel lath internally, stainless
steel externally, with associated accessories.
Building paper shall conform to BS 1521 Class B. Steel lath to comply with BS
1369.
2.2.7 Mortar plasticizers
Mortar plasticizers shall comply with BS 4887.
2.2.8 Nails
Nails shall be clout headed galvanised nails to BS 1202.
2.2.9 Metal Lathing
Metal lathing for plastering shall be galvanised expanded steel complying with
BS 1369.
2.3 Execution
2.3.1 General
All plasterwork shall be executed in a neat and workman-like manner all to the
approval of the Engineer. Conform to the recommendations of BS 5492 in
regard to plastering.
2.3.2 Screeds
a) Jointing, Setting out of Bays
Screeding under in-situ flooring shall be carried out in accordance with the
general recommendations and BS 8203 & BS 8000, Part 9 in the case of
resilient and hard flooring materials respectively.
Cement and sand screeds which are to be covered with linoleum, vinyl or other
thin material shall be laid in strips approximately 3m wide. Other joints shall
coincide with joints in the concrete base.
The fill-in bays in this system shall not be laid until the alternate bays have
hardened.
b) Preparation
To ensure proper bond any laitance on the concrete base slab shall be removed
by scrabbling. Remove all dust and completely clean entire surface of base slab
and keep well wetted for several hours before laying screed/topping. Remove
free water and then brush in cement slurry or prime as necessary and use a
bonding agent in accordance with manufacturer’s recommendations. Intended
method to be agreed with the Engineer prior to commencing work.
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Cover any pipes, floor trunking etc. with a strip of heavy gauge expanded metal
lathing or light gauge steel reinforcing fabric 500mm wider than the embedded
item.
c) Granolithic Screed
Granolithic flooring finishes laid thicker than 40mm shall be laid in two courses
of which the upper shall be at least 18mm thick. Both courses shall have the
same mix proportions including water-cement ratio. The lower course shall be
thoroughly compacted and the upper course then immediately placed on it.
After topping has been fully compacted, trowel surface at least 3 times at
intervals during the next 6 to 10 hours to produce a uniform hard surface, free
from laitance and with as much coarse aggregate as possible just below the
surface.
Form skirting and up-stands etc. by trowel or formwork as appropriate on well-
keyed backgrounds to required thickness and profiles. Thoroughly bond to the
floor layers and form neat angles and junctions.
d) Sand/Cement Screed
Floor screeds shall be mixed in the volume of 3 parts sand to 1 part cement by
weight. They shall be finished flat and smooth with a wood float if required to
receive a further finish. Screeds for carpet shall be finished flat and smooth
with a steel trowel.
Generally screeds shall be laid in bays not exceeding 12 square metres and in
strips not exceeding 4.5m in width and/or 15 square metres. Joint allocations to
be approved by the Engineer prior to starting work.
Screeds should be laid to the thickness shown on the Drawings or to falls as
shown for areas which drain. Where a level screed is required variation in level
should be limited to ± 3mm under a 3m straight edge.
The cement-sand ratio shall be 1:3 by volume. If laid within three hours of the
placing of the base, or lesser time in hot weather, the screeding shall be not less
than 12mm and not more than 25mm thick.
The screed shall be brought to a smooth and even surface to the required levels.
Where the screed is to be laid on a set and hardened concrete base the screed
shall not be less than 40mm thick and the base shall be prepared as described in
Sub-Clause (b).
Where the screed is not bonded to the base its minimum thickness shall be
50mm.
Screeds over 40mm thick shall be formed in fine concrete of mix proportions
1:1:5:3 cement-sand-coarse aggregate (10 mm maximum) and shall be brought
to a smooth and even surface to the required levels.
Screeds less than 80mm thick, to be laid in one layer. For screeds over 80mm
thickness lay in two layers, the first being not less than 20mm thick and the
second being placed immediately after compaction of the first layer.
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Compaction of screeds to be carried out by approved mechanical means. Areas
inaccessible to such equipment may be steel trowel compacted and floated
manually.
Bring surface to a smooth uniform finish free from defects and blemishes to
provide a satisfactory surface to receive the floor finish required.
Where cement and sand screeds are to receive terrazzo, clay or ceramic tiles the
screed shall be finished with a slightly rough finish to accept the cement paste
and tiles.
Check levels to ensure compliance with the requirement of the Drawings.
Permitted tolerance will be 3mm in 3000mm in any direction.
e) Consistency of Mixes - Water Cement
The water content of the mixes used for cement and granolithic finishes shall be
the minimum necessary to permit spreading and compaction.
f) Service Penetrations
Pipes and/or conduits shall not be cast into the screed without the Engineer’s
prior approval. Should they be required they must have reinforcement overlaid
as described in part (b).
g) Laying
The screed should be laid while the slurry or bonding agent is still wet. Ensure
that it is well compacted.
The screed should be cured by closely covering screeded areas with polythene
sheeting as soon as the screed is set and keeping this in position for 7 days.
The screed should be kept damp during the curing period and wetted whenever
necessary to achieve this.
During laying of screeds all existing work should be adequately protected against
spillage, staining or any other damage.
h) Curing
As soon as the trowelling is completed maintain the concrete in damp condition
for at least seven days with waterproof sheeting well lapped and kept in close
contact. Thereafter ensure drying out continues slowly; protect from heat or any
other conditions that might accelerate the drying.
i) Monolithic Finish
Monolithic finish to concrete floor slabs shall comprise carborundum dust evenly
sprinkled on whilst the concrete is still green at a rate of not less than 1 kg/m2 and
lightly trowelled in before final finishing.
j) Bathrooms
In bathrooms and W.C’s the structural slab shall first be treated with 3 coats of
a waterproof membrane before application of screeds and tiling. The
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membrane shall extend around all walls to a height of 150mm above finished
floor level. The membrane shall be applied in accordance with the
manufacturer’s recommendations. A 10 year warranty shall be provided.
2.3.3 Plastering/rendering
a) General Plastering/rendering will be carried out in accordance with BS 8000, Part 10 and
BS 5492.
Remove ridges and other imperfections from shuttered concrete surfaces before
cleaning down.
All surfaces to receive plaster/render to be thoroughly clean and free from any
extraneous material which would adversely affect the plaster/render bond.
Roughen smooth surfaces to ensure a keyed bond to plasterwork.
Thoroughly wet block work, concrete and other similar surfaces before plasterwork
is commenced to reduce suction.
b) Metal lath, corner/stop etc.
All plasterwork stop ends, junctions with other materials and corners to have
appropriate metal stop and corner beads.
Expanded metal lath to be installed where shown on the Drawings or as
instructed on site by the Engineer. Provide such reinforcement to cover all
construction joints, electrical conduits and service pipes running within walls.
Metal lathing shall be fixed with galvanised steel staples with joints lapped 40
mm and tied with galvanised or stainless steel wires. The long way of the mesh
should be at right angles to the supports. The slope of the strands should be all
in one direction which for vertical work should be inwards and downwards.
c) Plaster/render mix proportions
All materials used for plasterwork shall be proportioned by volume by means
of gauge boxes as follows:
Internal plastering : 1 : 1 : 6 (Cement:Lime:Sand)
External rendering : 1 : 3 to 4 (Cement : Sand)
Note:
Lime putty may be added if required to improve workability but to a proportion
not exceeding ¼ of that of cement by volume.
2.3.4 Mixing of plaster/render/screed
Except where hand-mixing of small batches is approved by the Engineer,
mechanical mixers of an approved type shall be used for the mixing of plaster.
Caked or lumped materials shall not be used. Mechanical mixers, mixing boxes
and tools shall be cleaned after mixing each batch and kept free of plaster from
previous mixes. Plaster shall be thoroughly mixed with the proper amount of
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water, uniform in colour consistency. Re-tempering will not be permitted and
all plaster which has begun to stiffen shall be discarded.
Hand mixed plaster shall be first mixed in the dry state being turned over at
least three times. The required amount of water should then be added and the
mix again turned over three times or until such times as the mass is uniform in
colour and homogeneous.
Plastering mix containing self-setting materials shall be used up within the
recommended working time for the mix concerned. Mixes containing cement
shall be used up within two hours of the first contact of the cement with water.
All material remaining after this period shall be discarded.
2.3.5 Handling and Storage
Metal lathing shall be stored in dry conditions and protected from damage.
2.3.6 Mixing
Hand mixed plaster shall be first mixed in the dry state being turned over at
least three times. The required amount of water should then be added and the
mix again turned over three times or until such times as the mass if uniform in
colour and homogeneous.
Plastering mixed containing self-setting materials shall be used up within the
recommended working time for the mix concerned. Mixes containing cement
shall be used up within two hours of the first contact of the cement with water.
All material remaining after this period shall be discarded.
2.3.7 Application of plaster/render
Unless indicated otherwise on the Drawings the thickness of plaster/render
shall be as follows:
Internal walls 2 coats, total 15mm thick
Exposed Internal ceilings, soffits 2 coats, total 12mm thick
External render 2 coats, total 20mm thick
Carry out a sample for approval of each type of render on a suitable wall of
approximately 10m2, including 1m2 with a final finish, as a test panel for
approval before continuing the operation.
2.3.8 Curing of plaster
Allow adequate ventilation to remove excess moisture from the plaster and
keep it moist in accordance with the recommendations of BS 8000, Part 10 for
curing; do not allow the render to dry out too rapidly.
Under no circumstances use membrane methods of curing.
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2.3.9 Defects in plaster/render
Defective areas of plaster/render to be carefully cut out to rectangular shape,
using sharp chisels and taking care not to loosen adjacent material, the edges
undercut to form dovetail key; apply bonding agent and allow to cure, re-plaster
in accordance with the specification, allowing adequate time for drying
between coats and finish flush with the face of surrounding plasterwork.
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3 Membrane Roofing
3.1 General
3.1.1 Scope of work
Supply and installation of roof screed, protected waterproof membrane,
insulation and protection for flat roofs.
3.1.2 Relevant Standards
Conform to the recommendations of the following British Standards where
applicable:
BS 1470 : 1987 Specification for wrought aluminium and
aluminium alloys for general engineering
purposes.
BS 6229 : 1982 Code of practice for flat roofs with continuously
supported coverings.
BS 8000 : 1989, Part 4 Code of Practice for waterproofing.
3.1.3 Submittals
Submit to the Engineer for his approval at least 60 days prior to use, proposals for
the complete roofing systems together with full specifications, technical literature
and samples.
Evidence must be provided of three successful installations of a similar nature
which are at least ten years old.
The roofing system is to be approved in writing by the Engineer before
commencement of the work, and the work is to comply in all respects with the
approved specification.
3.1.4 Co-ordination
Check and verify the positioning and fixing of all conduits and other items
which are to be concealed or laid within the screed thickness. Ensure that such
items requiring testing have been satisfactorily tested and approved by the
Engineer before screeding is commenced.
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3.1.5 Workforce
All roofing works are to be carried out by competent operatives skilled in this particular
work.
Roof membrane shall be applied by an approved specialist subcontractor.
3.1.6 Guarantee
Completed waterproof membranes shall be guaranteed for a period of not less
than ten years from the date of contract completion. Should any damage occur
to the building or its contents as a result of faulty materials or workmanship, the
Contractor shall make good such defects to the satisfaction of the Engineer.
3.2 Materials
3.2.1 Cement
Ordinary Portland Cement complying with BS 12:1978, or Omani Standard No.
OS 07.
3.2.2 Fine Aggregates
Sand for use in roof screed shall comply with the requirements for sand for
concrete as specified elsewhere herein.
3.2.3 Coarse Aggregates
Aggregates for use in roof screeds is to be 10mm and shall comply with the
requirements for aggregate for concrete as specified elsewhere herein.
3.2.4 Water
Clean potable water, to conform to Concrete Works specification.
3.2.5 Roofing Membrane
The roof membrane shall be “Bituthene 8000 HC” manufactured by GRACE or
equal and approved.
Proprietary high performance 1.5mm thick solar reflective roof cold applied,
flexible pre-formed waterproofing membrane comprising a four layer cross
laminated high density HDPE carrier film with a solar reflective surface and a
self-adhesive rubber/bitumen compound which conforms to the following
requirements:
Property Test Method Typical Value
Tape Strength ASTM D638 Long 5.2 N/mm
Trans 5.8 N/mm
Tensile Strength ASTM D638 Long 40 N/mm2
Trans 36 N/mm2
Elongation Film ASTM D638 Long 200%
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Trans 170%
Elongation Compound ASTM D638 125%
Tear Resistance ASTM D 1004 Long 270 N/mm
Trans 270 N/mm
Adhesion to Primed Concrete ASTM D 1004 1.8 N/mm
Adhesion to Self ASTM D 1000 1.8 N/mm
Puncture Resistance ASTM E 154 290N 65mm
Water Resistance ASTM D570
after 24 hrs
after 35 days
0.14%
0.94%
Environmental Resistance ASTN D543 Conform
Moisture Vapour
Transmission Rate
ASTM E96 0.2 g/m2 / 24 hrs
3.2.6 Membrane related Products and Appurtenances
All products and appurtenances associated with the roofing membrane are to be
proprietary items as supplied or recommended by the membrane manufacturer.
Examples include solar reflective membranes and paint, surface primers, fillets,
mastic sealants and flashings.
3.2.7 Insulation
600 x 1200 x 50mm thick proprietary extruded closed cell polystyrene rigid
foam, with skin, and rebated edges.
The material shall have the following properties:
1. Five year aged average thermal conductivity of 0.032 W/mk when tested at
24oC in accordance with DIN 52612 or ASTM C-518.
2. Compressive strength of 280kPa average, when tested according to DIN
53421 or ASTM D-1621.
3. Water absorption of 1% in volume average when tested in accordance with
ASTM D-2842.
4. Water vapour permeability of 0.6 perm inch average when tested in
accordance with ASTM C-355.
A minimum density of 33 kg/m3.
3.2.8 Flashings
1 mm thick super purity aluminium sheet to BS 1474.
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3.2.9 Separation Layer
Polyester based synthetic fibre mesh.
3.2.10 Gravel
15 to 30mm diameter smooth edged wadi gravel.
3.2.11 Paving Slabs
400 x 400 x 50mm thick proprietary white precast concrete paving slabs.
3.3 Execution
3.3.1 Preparation for Screeds
Concrete surfaces which are to receive screeds are to be thoroughly “scrabbled”
preferably by mechanical means to form a regular rough texture. A tamped
finish will not be accepted. Thoroughly clean the concrete surface and ensure
that it is free from all loose particles and other extraneous matter which would
adversely affect the adherence of the screed material.
Spray concrete surface with water to thoroughly wet the surface to be screeded.
Allow free water to drain before screed application.
3.3.2 Lightweight Roof Screeds
Flat roofs shall be covered with a lightweight concrete roof screed which shall
have a maximum density of 500 kg/m³ consisting of cement and sand with a
foaming agent. Light weight aggregate may also be used. The work shall be
carried out by a specialist agency approved by the Engineer strictly in
accordance with the manufacturer’s recommendations.
The roof screed shall be laid to falls to ensure adequate run-off or rainwater and
to prevent ‘ponding’. The minimum thickness shall be 50mm and the screed
shall be laid in alternate bays of exceeding 3000mm in any direction.
The screed roof shall be thoroughly brushed clean of all dirt, loose stones etc.
Any small cracks shall be filled with an approved tropical grade thixotropic
cold bitumen emulsion with added rubber latex.
The screed surface to be waterproofed shall be even and smooth with any high
spots knocked back and local depressions and sudden changes filled with epoxy
mortar or similar high strength mortar to present a true surface. All sharp
projections and arises caused by formwork etc. shall be ‘scrabbled back’ to give
rounded corners. Primer shall be touch dry prior to the application of one layer
of the membrane. The primer must not be poured onto the surface and care
must be taken to avoid ponding in depressions.
All internal angle fillets shall be preformed triangular black PVC 50mm x
50mm extrusions with a wall thickness of 5mm, and shall be coated on two
faces adjacent to the corner, protected by silicone coated release paper. The
material shall be of a grade suitable for use in hot climates.
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External corners shall be trowelled to provide a 25mm x 25mm splay.
Where the membrane is to be terminated at an up stand, a 25 x 20mm deep
splayed chase shall be provided. The chases shall be thoroughly clean and dry,
and all dust, dirt, laitance etc removed from the faces by wire brushing and
compressed airline.
All inside and outside angles shall be provided with an additional 300mm wide
reinforcing strip of the membrane centred along the axis of the corner, prior to
laying of the main membrane.
3.3.3 Roofing Membrane
Installation of roofing membrane shall be carried out in strict accordance with
the manufacturer’s written instructions.
Ensure substrate is laid to the correct falls as shown on the drawings.
Thoroughly clean the surface which is to receive roofing membrane. Ensure
surface is dry and clear of loose particles and grease.
All roof up stands, parapets, service penetrations and expansion joints are to be
constructed in accordance with the standard details as instructed on the
drawings, or as recommended by the membrane manufacturer.
Reinforce all inside and outside angles, and other vulnerable areas with an
additional 300mm wide membrane strip prior to laying of the main membrane.
Dress the roofing membrane into the roof rainwater outlets, which are to be of a
design to allow draining both at membrane level and at the top of the roof tiles.
Prior to covering the completed membrane request the Engineer to make an
inspection. Clean and patch any damaged areas to the approval of the Engineer.
3.3.4 Roof Insulation Boards
Lay boards in accordance with the manufacturer’s instructions, in a brick bond
pattern. Where the tiles are laid over a change or roof slope they shall be neatly
cut with a saw along the line of the change in roof plane. The joint shall leave a
small gap.
Cut the tiles carefully around up stands, pipe work and roof mounted plant.
Alternatively in order to avoid small cut pieces the tiles may be set out to create
a space round the up stand or pipe work which may then be filled with gravel or
ballast.
3.3.5 Separation Layer
Lay a separation layer loose over the entire area to be insulated, carefully
trimming and allowing a 50mm up stand at parapets, pipe penetrations,
rainwater outlets, etc. Lap joints at least 300mm.
3.3.6 Gravel
Spread gravel over the areas indicated on the roof plans to a thickness of about
50mm to provide a neat even finished surface.
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3.3.7 Paving Slabs
Where indicated on the roof plans lay paving slabs with tight but open joints,
secured in place with 1:6 cement: sand mortar dabs.
3.3.8 Pipes and Services through Roof Slabs
All waste stacks, ducts and pipes penetrating the roof slab are to be
weatherproofed in accordance with the Architects details, consisting of a block
work up stand and concrete slab with the pipe turned through 90 degree.
Plinths for equipment shall be built off the roof slab prior to commencing roof
waterproofing. Plinths supporting pipe runs and cable trays may be built off the
roof slab or precast plinths may be located on top of the insulation prior to
laying paving slabs.
3.3.9 Testing
All horizontal roofing areas shall be water flood tested prior to the installation
of the protection course.
No areas shall be water tested less than 72 hours after application of
waterproofing membrane.
Water testing shall include flooding of the entire area either by section or in its
entirety to a depth to be agreed with the Engineer for a minimum period of 72
hours.
3.4 Protection
The Contractor shall employ whatever methods are required to protect the roof
at all times, up to the building handover, from damage from any cause
whatsoever, and make good any such damage at his own cost.
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4 Carpentry and Joinery
4.1 General
4.1.1 Scope of Work
The scope of work includes the following:
Manufacture and installation of:
• Doors and door frames
• Counters and vanity units
• Fitted kitchen units (where required)
• Miscellaneous timberwork and specialist joinery
All in accordance with drawings.
The doors should further comply with the specific sections of this specification.
4.1.2 Standards
Comply with the following standards where relevant and to the extent stated
here.
• BS 5268 : 1991 Structural Use of Timber
• BS 1186 : 1988-91 “Timber for & Workmanship in Joinery”
• BS EN 942 : 1996 Timber in Joinery - General Classification of
Timber Quality.
• BS 8000:1990, Part 5 Code of Practice for Carpentry, Joinery and
General Fixings.
4.1.3 Setting out
All work is to be set out and constructed to the dimensions given and to the full
intent of the drawings and specifications. Check dimensions on site before
cutting or pre-fabricating components. In general, site dimensions will take
precedence over drawings, the Engineer’s approval is however required in such
cases.
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4.1.4 Shop Drawings
Do not commence manufacture of joinery components without the prior
approval of the Engineer and his agreement to the shop drawings. Details of
construction shown on drawings prepared by the Engineer may only be altered
with the prior agreement of the Engineer.
All work including joint types, fixings, etc must be detailed on shop drawings
and approved by the Engineer before manufacture.
4.1.5 Samples
Prior to general manufacture, full size samples of each type of timber
construction must be fabricated and installed in order to approve all parts of the
process.
4.1.6 Joinery in General
Unless otherwise specified, all joinery is to be purpose made, worked to
detailed drawings where provided and constructed in accordance with approved
best practice. It shall be mortised and tenoned, dowelled, dove-tailed, tongued,
grooved, glued, pinned, screwed etc. as necessary and best suited for the
particular purpose.
4.2 Materials
4.2.1 Timber Generally
All timber shall be sound, thoroughly seasoned, of mature growth, clean sawn,
square-edged, free from sap, ring shakes, cracks, splits, large, loose or dead
knots, boxed heart, wanly edges, insect attack, fungus growth, rot, dote or
incipient decay, stained sapwood and other defects and shall be to the approval
of the Engineer.
Timber shall be straight and true; any warped or twisted timers will be rejected.
All materials and components are to be stacked on suitable bearers clear of the
ground and protected from the weather until they are fixed in position. If
necessary provision shall be made for temporarily covering or otherwise
protecting materials and components after they have been fixed in position
4.2.2 Hardwood for Internal Use
Unless otherwise specified, selected Beech (Fagns Sylvatica) or Cherry
complying with the requirements of BS EN 942,Class J2 without sapwood.
Density to be approximately 700 kg/m3.
4.2.3 Hardwood for External use
Unless otherwise specified, selected Meranti Nimusu complying with the
requirements of BS EN 942, Class J2 without Sapwood. Density to be
approximately 700 kg/m3.
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4.2.4 Exposed Timber
All faces of timber which will be exposed when the building is complete shall be
wrought and shall have been selected as to quality of face. Grains shall be
parallel to the length under max 60% degrees.
4.2.5 Pressure Impregnation
All Meranti timbers shall be vacuum treated for termite resistance and
preservation.
Timber shall be impregnated by Hickson Vac-Vac process to achieve an
average loading of 40 litres “Vascol WR” preservative per m3 of timber or
equal.
All ‘cut ends’ joint forming, planning and/or any on-site cutting shall be
liberally treated with Hickson “Vasele” end grain preservative.
4.2.6 Moisture Content of Timber
Timber shall be properly and carefully air seasoned to 20-25% moisture content
prior to kiln drying. The moisture content shall be suitable for the situation of
the finished timber but shall be limited to 11% ± 2% for internal use and 13%
± 2% for external work. When fixed in position the timber shall remain stable
and free from any expansion or contraction or other movement which will
detract from the satisfactory performance or required appearance of the
element. The timber shall be free from any drying defects whatsoever and there
shall be no indication of shrinkage.
The Contractor shall replace at his own expense any timber which has been
damaged or shrunk on finished work caused through the use of imperfectly
seasoned timbers.
Immediately before manufacture the moisture content of timber should be
ascertained using an electrical moisture meter to manufacturer’s
recommendations. Test 5% but not less than 10 lengths of each cross-section;
average results shall be in the centre of the specified range.
During delivery, storage, fixing and thereafter to practical completion maintain
conditions of temperature and humidity suitable for specified moisture
content(s) of timber components.
The moisture content at the time of matching to the dimension indicated shall
conform to the requirements of the said standard specification for the kiln
drying of timber, for items customarily kiln dried. The timber in any
consignment shall be deemed to be satisfactorily kiln dried if upon inspection
of representative samples drawing from the consignment, tests indicate that for:
Interior use/Interior joinery and door stock - At least 90% of the samples shall
have a moisture content not exceeding 11% and the remaining samples shall
have a moisture content not exceeding 13%.
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Exterior joinery - At least 90% of the samples shall have a moisture content not
exceeding 13% and the remaining samples shall have a moisture content not
exceeding 15%.
The Engineer may require the Contractor to submit timber for testing. The
Contractor shall replace joinery in which defects occur through improper
moisture content.
4.2.7 Timber for Joinery
The Contractor shall carefully select the timber for joinery so to minimise
disfiguring defects on finished faces.
4.2.8 Plywood
Plywood shall conform to the requirements of BS 1455:1972 grade 1 where
varnished, grade 2 where painted, grade 3 where hidden. All plywood shall be
obtained from an approved manufacturer. All plywood shall be resin bonded
external quality. Both faces of all plywood shall have a fine sanded finish and
be free from all knots except those which are sound and tight and exceeding
12mm diameter. Plywood shall, in addition to the general specification
requirements for timber, be free from all defects such as lifting at the edges,
blistering, surface cracks, sinking or raising of the surface due to defects in the
base material and no patches or plugs will be permitted.
4.2.9 Fixings
Nails shall comply with BS 1202. Wood screws shall comply with BS 1210.
All other fixings shall comply with the requirements of the relevant British
Standard or be of a good merchantable quality approved by the Engineer.
Any metal screws, bolts, nails, fastenings, fixing devices etc. used in the
construction or fixing or joinery work to be located externally, shall be of
stainless steel. All brad nails, etc. shall be best quality of appropriate gauge,
strength and shall be long enough to enter the second timber for at least half
their length before punched. Screws shall be of sufficient length and gauge for
their purpose. Screws for door furniture and other ironmongery shall be of
material and pattern to match the various fittings.
All screws for interior use shall be solid brass counter-sunk, flathead wood or
twin fast screws. All nails and bolts for internal use shall be galvanised. All
necessary fastenings and fixings are deemed to be included in the works even if
not specifically mentioned in the drawings and specification.
All necessary means of support and connection are deemed to be included in
the works even if not specifically mentioned in the drawings and specification.
4.2.10 Adhesives
Adhesives for external work shall be synthetic resins and comply with the
requirements of BS 1204 : Part 2:1979 for the BR grade except that when glue
lines are exposed to the weather they shall be of WBP grade.
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Adhesives for internal work shall be synthetic resins complying with the
requirements of BS 1204 : Part 2 and shall be MR or INT grade unless
otherwise specified.
4.3 Execution
4.3.1 General
Timber for carpentry work shall be carefully sawn square and shall hold the full
dimensions shown on the drawings. Softwood used in carpentry shall be put
together with steel nails except where specified as framed when it shall be
properly jointed and held together with glue and screws.
Timber, used for joinery work shall be finished wrot to the exact size shown on
the drawings and no joinery shall be built in until inspected and approved by
the Engineer. All work shall be carefully put together and properly jointed in
accordance with best practice: all joints shall be glued and screwed or
dowelled. Any screws appearing on face work shall have the heads let in and be
pelleted unless specified otherwise. All exposed rises in joinery work shall be
pencil rounded.
All timber before being built-in shall be given specified coats of wood
preservative or priming.
Joinery generally shall comply with the requirements of BS 1186: Part 1 for
quality of workmanship and shall whatever possible be fabricated and
assembled prior to delivery on site.
Joinery work is to be accurately set out framed and executed directly after the
commencement of the building, but it is not to be wedged up until it is required
for fixing in position. All exposed surfaces are to be wrot.
Except where the work is to be built-in obtain all dimensions for joinery works
from the building structure. Carpentry work which does not form an essential
part of the structural fabric shall not be carried out nor brought onto the
building site until required.
Provide and maintain all temporary covering, and box in and protect all work
liable to damage, and shall provide temporary doors where necessary during the
progress of the work. Ensure that the work of other trades is properly arranged
to obtain the best results both in the joinery and in other trades involved. Take
all necessary measures to check or prevent capillary penetration of water in the
joints and open connections of external joinery works.
4.3.2 Dimensions
Timber for joinery is to be wrote or moulded on all faces to the dimensions and
shapes shown on the drawings or otherwise specified. Where nominal
dimensions are given a deduction of 4mm for each wrote or moulded face shall
be allowed. Full size details shall be held to show actual finished sizes unless
otherwise stated.
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4.3.3 Moisture Movement
Precautions shall be taken, as far as possible to minimise the effect of moisture
movement. These may include sealing the ends and concealed faces of timber
and the edges and faces of sheet materials and assembling with slotted fixings
to minimise distortion.
4.3.4 Joints
Where joints are not specifically shown on the drawings they shall be of the
recognised and accepted form for their location and purpose. All joints shall
comply with the requirements of BS 1186: Part 2 in principle or detail. All
joints shall be put together with a suitable adhesive or filler. All joints exposed
to the weather shall be sealed, or otherwise protected to prevent the ingress of
water. All nails, sprigs, pins, etc. are to be punched below the surface and
stopped with putty in the case of joinery which is to be painted and with a
suitable hard stopping matching final finish in all other cases.
Timbers are to be in one piece of the length required wherever possible.
Where joints in the length are unavoidable, timbers up to 75mm in depth are to
be halved and timbers exceeding 75mm in depth are to be splay scar fed. Joints
are to be so constructed that they will resist the stresses and transmit the loads
to which they will be subjected and shall be to the approval of the Engineer.
Joints are to be accurately formed and tight fitting and secured with an adequate
number of screws and nails of the correct length properly clenched at right
angles to the grain, unless bolted joints are specified. The jointing surfaces of
all connections exposed to the weather are to be thickly primed with approved
priming paint immediately before the joint is made.
Wherever possible in brandering, battening and similar members' length joints
shall be formed over the points of support.
All joints of architraves, skirting, etc., at angles shall be neatly mitred and all
mouldings at tee inter-sections shall be neatly scribed. All joinery work which
is to be painted is to be prepared and primed in accordance with the
specification immediately after it is ready for fixing. The jointing surfaces of all
connections of joinery to be painted are to be thickly primed with approved
priming paint immediately before the joint is made. Where external joinery has
to have glued joints, an approved waterproof adhesive shall be used. All nail
heads are to be punched and screws countersunk.
Where a bolted joint is specified, it is to be made with screw bolts with nut and
two washers or as specified and approved. Nuts are to be well tightened but not
to the extent of damaging the timber under the washer.
4.3.5 Nailing
Wire nails, unless otherwise specified, shall be of the greatest diameter
practicable consistent with their spacing and the avoidance of splitting. Where
necessary to avoid splitting lead holes of a diameter not greater than 80 percent
of the diameter of the nail shall be bored. Nails which are described to be
clenched shall be of a length not less than 10 mm greater than the total
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thickness of the timbers to be fixed and the points shall be bent at right angles
to the grain and hammered flush with the surface.
4.3.6 Screws
Woodscrews shall be of the length, gauge and type and at the spacing given in
the drawings.
Alternatively and when not otherwise specified, screws shall be of a length to
engage all pieces being fixed and give a point side penetration of not less than
seven times the diameter of the screw. Lead holes of a diameter not greater than
90 percent of the diameter of the root of the thread adjacent to the shank shall
be bored for all screws and the screws shall be screwed home with screwdriver
for their full length.
4.3.7 Fixing to Block work & Concrete
The whole of all timbers in carpentry work which are in contact with walls or
concrete are to be thoroughly brush coated before delivery to site with two
coats of wood preservative. All timber which is cut after being treated is to be
re-treated with two coats of preservatives. Where carpentry or joinery work is
to be fixed to concrete or block work, the latter shall have neat mortises made
of the required depth which shall be plugged in accordance with the best
practice ready to receive proprietary expanding plugs/bolts.
Ensure adequate penetration of masonry bolts into masonry; do not fix
expanding bolts near edges of masonry; use resin anchors instead.
4.3.8 Bolting
Bolts are as follows:
a) Use bolt lengths that will project at least one complete thread beyond the
head of the nut without undue tightening.
b) Drill holes at right angles to the faces being brought together.
c) Drill holes slightly larger than bolt diameters unless timber has dried to the
moisture level in service.
d) Use large thick washers under head and nut.
e) Do not split out the timber on the reverse side when drilling. If necessary to
prevent this, drill from both sides after a small lead hole.
f) Tighten so that washers just compress the timber. Do not tighten so much
that the washer or timber deforms.
4.3.9 Straps and Anchors
a) At each timber contact fix with a minimum of two screws when the number
not detailed.
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b) When strapping joists and rafters, and so on, use straps to span at least two
members.
c) When strapping to masonry, block any gaps between timber members and
masonry.
d) Ensure that any strap taken into a masonry wall cavity is turned down tight
against the inner skin for an adequate distance.
e) When fixing straps to tops of masonry walls (for example, lateral restraint
at gables) ensure that the fixing is not limited to a small masonry unit (such
as a cut block, a single brick).
f) Ensure that all faces intended to be in contact are in close in contact without
unspecified bending and improvisation.
4.3.10 Joist Hangers
Unless otherwise indicated, use screw-to-wall hangers. Select hangers of the
correct size to fit the timber and to suit the loadings. Fix as follows:
a) With all supporting or fixing surfaces in close contact with the background
and the timber being supported. A 6mm (max) gap is permitted between
end of joist and hanger back plate.
b) Nail to the timber being supported through all pre-drilled holes.
c) Ensure joists are properly levelled and undertake any unavoidable notching
carefully and accurately.
4.3.11 Framing Anchors
Subject to approval of the proposed type and locations, framing anchors may be
used instead of timber joints.
4.3.12 Wall Plates
If possible fix wall plates in one piece between changes of direction; otherwise
make 100mm lap joints. Bed in mortar truly level and fix with straps where
necessary. Plug and screw or strap to lintels.
4.3.13 Bearings
Bear timbers in full contact on designed supports. Liberally coat with
preservative ends built into masonry. Protect from contact with potentially
damp surfaces and structures by DPC, where packing are necessary use
material that will not rot or compress.
4.3.14 Fixing to Aluminium
Where aluminium components are fixed to joinery work, aluminium or
cadmium plated steel screws and washers are to be used.
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4.3.15 Exposed Fixings
All nails heads should be punched below timber surface which will be visible in
completed work. Holes to be stopped with approved filler.
4.3.16 Pelleting
Countersink screw heads 6 mm below timber surfaces which are to be clear
finished. Glue in grain matched pellets not less than 6 mm thick and cut from
matching timber. Finish off flush with face.
4.3.17 Plugging
Locate specified plugs accurately into drilled holes for screw fixings to concrete,
masonry and block work. Use proprietary plugs in accordance with the
manufacturer’s recommendations. When plugging through applied finishes ensure
that plugs and fastenings have ample penetration into the structural backing.
4.3.18 Built in Joinery
Where joinery is described as “to be built-in” for setting it in position, plumb,
level, brace and temporarily prop it so that it cannot be displaced during
subsequent buildings operations. Provide and fix to the joinery any holdfasts,
anchors or other fixings required to permanently fix it in the completed works.
If instructed by the Engineer, provide and fix protection pieces to edges and
surfaces likely to be damaged during the construction process and remove them
and make good on completion.
Unless designed and intended to support loads, built-in joinery shall not be used
as a temporary support for lintels or other parts of the structure. Sufficient
clearance shall be provided around all units to ensure that deflections of the
surroundings structure cannot impose load on the unit and any bedding, or
pointing, of such clearances shall be with a resilient material.
Where joinery works are to be built in before the surrounding building carcass
is complete the Contractor shall ensure that the necessary fixings are
incorporated in the carcass. The work shall be fixed in plumb and true in
accordance with the drawings with all necessary wedges and shims as detailed
or as may be directed. Overhead clearances and levels shall be maintained
where applicable.
Where timber work is required to be wrote, it shall be machine dressed, unless
otherwise directed. All joints, mortises, housings etc. shall be perfectly formed and
fitted, and all joints shall be painted over with preservative before fixing.
4.3.19 Protection
Surfaces to be painted shall be primed as soon as possible after fixing, and
hardwood surfaces, or surfaces for clear finishes, shall be given a sealing coat
of a clear sealer compatible with the final finish as soon as possible after fixing.
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4.3.20 Preservatives
Preservatives shall be applied by brushing, steeping, vacuum pressure or double
vacuum processes as stated in the description or appropriate to the type of
preservative.
Brushing shall be two full coats brush applied: steeping or dipping shall be
complete immersion for a period of not less than three minutes.
Vacuum pressure and double vacuum treatment cycles shall be as specified in
BS 5589 and a certificate of treatment shall be provided.
Before applying preservative by any method, the timber shall be clean, free
from surface moisture and dirt and at a moisture content not exceeding 22
percent. Treatment is normally to be carried out after all cutting, boring or
shaping is complete.
If cutting, boring or shaping after treatment is unavoidable a liberal coating of
the same, or a compatible, preservative solution must be given to the cut
surface. When pressure treatment with a water-borne preservative is required
by the description the timber must be dried after treatment to the specified
moisture content.
4.3.21 Adhesives and Fillers
Surfaces to be coated with adhesive or fillers shall be clean, free from sawdust
or dust, oil or other contamination, and shall be freshly cut. Except in the case
of plywood, hardboard and similar surfaces which have to be lightly scored to
assist adhesion they should not be sandpapered.
All adhesives must be stored and mixed in clean containers and the maker’s
instructions concerning mixing, pot-life, application and setting conditions
strictly followed.
Adequate pressure must be applied to all glued joints to ensure intimate contact
of the meeting faces and pressure must be maintained until the adhesive has set.
Organic glues and casein adhesives may be used in internal joinery where the
joint is not load bearing and moisture contents are not likely to exceed 16%. In
all other cases synthetic resin or PVA adhesive must be used.
If mechanically secured joints are to be put together with filler it shall be a
white lead paste or suitably formulated mastic to the Engineer’s approval.
4.3.22 Veneered Work
Work which is described to be ‘veneered’ shall be covered on exposed surfaces
with wood, or other, decorative veneers selected by the Engineer. Unless
otherwise specified or agreed, all panels shall have a suitable compensating
veneer on unexposed surfaces.
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4.3.23 Clear Finish
Timber described as ‘to be for clear finish’ shall be selected for grain and
colour to avoid excessive con-contrast between adjacent pieces and shall be
fine-sandpapered.
4.3.24 Finishing for Polish, Paint or Stain
All joinery which is to be polished, stained or painted shall be finished smooth
and clean by rubbing down by hand with fine glass-paper.
4.3.25 Scribing
All skirting, plates, and other joinery-work described as ‘scribed’ shall be
accurately scribed to fit the contours of the surfaces against which they abut.
4.3.26 Protection from damage
All joinery shall be protected from damage during the construction of the works
and when handed over shall be to the Engineer’s entire satisfaction. Before
handing over the Contractor shall ensure that all moving parts move easily.
Make all necessary adjustments including those needed during the maintenance
period.
4.3.27 Timber Handrails
Timber handrails shall be turned from milled wood to finished profile as shown
on drawings in unbroken lengths. Joints shall be lapped and scarfed to match
grain and free ends shall be bull-nosed.
Fixings shall be stainless steel proprietary fixings, secret fixed, at centres, not to
exceed 1.20m in straight runs and 0.8m at changes of direction.
4.3.28 Finish
All timber members shall be treated as specified in the ‘Painting’ section.
4.3.29 Making good all defects in work
Should any shrinkage or warping occur or any other defects appear in the
joinery work before the end of the defects liability period all defective work
shall be taken down and renewed to the entire satisfaction of the Engineer and
any work disturbed made good at the Contractor’s expense.
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5 Metal Doors
5.1 General
5.1.1 Scope of Work
Supply and installation of proprietary steel doors.
Relevant Standards
Conform to the recommendations of the following British Standards where
applicable:
BS 1245 Specification for metal door frames (steel)
BS 5286 : 1978 Aluminium framed glass doors - sliding
BS 6496 : 1984 Specification for powder organic coating
CP 153 Cleaning, durability, sound insulation fire hazards
5.1.2 Literature, Shop Drawings and Samples
Submit comprehensive technical literature giving details of all proposed metal
doors for the prior approval of the Engineer.
Submit illustrations and samples of various powder coating and colours for
selection by the Engineer.
Submit shop drawings of the proposed metal doors including installation and fixing
details for the Engineer’s approval.
After finalisation of all details, full sized samples, inclusive of all fixings,
ironmongery and other components shall be fabricated for approval by the
Engineer prior to full production for each door type.
5.1.3 Evidence of Performance
Provide independently certified evidence that all doors comply with specified
performance requirements.
Provide evidence from the manufacturer of their suitability in terms of their
resistance to the action of the elements i.e. wind, rain, temperature, and general
structural integrity. Where doors are specified as fire rated, a certificate of
compliance with R.O.P. approval must be submitted.
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5.1.4 Storage and handling
All items described under this section shall be handled, delivered or stored in a
manner that will avoid damage, rust or deformation. Items shall be stored off-
ground and shall be entirely covered with weatherproof coverings in storage
area.
Items which become rusted or damaged because of non-compliance with those
conditions will be subject to rejection, and such items shall be replaced without
additional cost to the Employer.
All visible anodized or powder coated surfaces shall be protected by suitable
low tack tape or lacquer before delivery to site.
5.2 Materials
5.2.1 Steel Doors
Proprietary steel doors to the sizes, detailing and configuration shown on the
Drawings. Construction to be of two skins of 1.22mm (18 g) zinc steel sheet,
lock seamed at vertical stiles and in filled with impregnated honeycomb board
insulation material.
Finish to be factory applied stove painted to later colour selection.
Fire-rated doors to be constructed accordingly and have proven certified fire-
ratings in compliance with door schedules.
All weather stripping shall be easily replaceable.
5.2.2 Glazing
As noted in the schedules and as specified under “Glazing” section herein.
Glazing where specified in doors must comply with R.O.P. requirements and
must not compromise the fire rating of the door.
5.3 Execution
5.3.1 Steel doors
Install doors in accordance with the manufacturer’s recommendations. Provide
adequate protection until handover. The units shall be transported, handled and
stored in accordance with the manufacturer’s recommendations and the
Contractor is responsible for ensuring that the installed units are not damaged.
Before fixing any metal work which will be in direct contact with concrete
should have 2 coats of bitumen solution or mastic impregnated tape applied to
the surface of the components. Black bitumen coating solution shall be as for
cold application to BS 3416 type.
All visible anodized and power-coated surfaces to be protected using low tack
tape or lacquer before delivery to site. Any item delivered to the site which
show any defect or deformation will be rejected.
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5.3.2 Installation of Doors
Ensure that adequate drainage holes if required are complete and neatly
finished before installation. Install the doors in accordance with the approved
shop drawings. Anchorages to be arranged to allow for adjustment with proper
allowance for normal building movement.
Fixing of frames for all units to the building shall be such to ensure solid, void
free, waterproof joints. Seal any gaps between frames and openings with
sealant in accordance with section “Sealants” herein.
5.3.3 Protection
Adequately protect finished surfaces against damage from subsequent building
operations such as plastering, etc. Carefully cover with masking tape or other
approved means.
5.3.4 Completion
Before project handover remove all protective tape and clean exposed surfaces
or extraneous marks to the satisfaction of the Engineer. Ease and adjust as
necessary all opening lights and leave in perfect working order
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6 Wooden Doors
6.1 General
6.1.1 Standards
All materials and workmanship shall comply with the relevant British Standard
or Code of Practice unless amended herein.
Conform to the following British Standards where applicable:
BS 459, Parts 3 and 4 Wooden doors
BS EN 942 Timber in joinery - General classification of
timber quality
BS 1186 : Part 2 Specification for workmanship
BS 4787 : Part 1 Internal and external wooden door sets, door
leaves and frames
BS 5588 : Part 3 Means of Escape for Offices
6.1.2 Local Authority Requirements
Where fire resisting properties are required ensure that construction details and
materials are to the approval of the R.O.P – Civil Defence Section.
6.1.3 Delivery and Storage
Wooden doors are to be delivered to the site un-primed.
Stack doors horizontally in piles and ensure adequate protection from direct
sunlight, moisture, excessive heat, etc.
6.1.4 Submittals
Submit detailed shop drawings of all wooden doors giving details of all joint
details, built-in frames or ironmongery, glass fixing etc. After finalization of all
details full sized samples inclusive of all fixings, stripping, glazing and other
components shall be fabricated for approval by the Engineer prior to full
production for each door/window/screen type.
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6.1.5 Evidence of Performance
Provide independently certified evidence that all doors comply with the
specified performed requirements, including R.O.P. certificate where
applicable.
Provide evidence from the manufacturer of suitability of the materials to action
of the elements i.e. wind, rain, temperature and structural integrity.
6.2 Materials - Doors
6.2.1 Doors and Frames Generally
All wooden doors and frames are to be proprietary items manufactured under
mass-production factory conditions by a company specializing in this work.
Door and frame types to be as detailed on the drawing and the door schedule.
Notwithstanding other specification clauses elsewhere herein all timber for
doors and frames shall be kiln dried with a moisture content of between 10%
and 12% and must be treated and guaranteed against termite/fungus treatment.
All other general specifications herein regarding timber are also to be applied in
regard to doors and frames.
6.2.2 Doors
Flush doors shall have solid wooden cores and hardwood lipping to all edges,
and shall comply with the standards specified for half-hour fire resistant doors
in accordance with BS 4787 and of the size and thickness as shown on the
drawings.
Doors shall be covered with 6mm minimum thickness of plywood both sides.
Internal doors shall be constructed using MR adhesive and MR plywood except
in wet areas where WBP plywood shall be used and WBP adhesive used for the
assembly of the door.
External doors shall be WBP ply and be assembled using WBP adhesives.
Openings for glass shall have glazing fillets in accordance with BS 459 Part 2.
Doors fixed in pairs shall have rebated meeting stiles worked solid on the
lipping unless noted otherwise on the drawings. Separate fillets will not be
permitted.
A teak veneer finish is required to both sides of wooden doors. Where
specified, the veneer shall be horizontal grain and veneer matching pattern.
Where doors are installed in pairs, the veneer pattern must be pair and set
matching.
All doors shall be manufactured to allow for incorporation of the desired door
accessories.
6.2.3 Wooden frames
All wooden door frames are to be taken from the solid and rebated and shaped
to the profiles indicated on the drawings. All edges to be pencil rounded.
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6.2.4 Steel frames
Steel door frames to be proprietary items to the profile indicated on the
drawings, pressed from 1.6 mm zinc coated steel sheet. All joints to be bolted
butt joints.
Finish to be factory applied self-etch stoved primer paint ready to receive site
applied top coats.
6.2.5 Core material
Semi-solid cores where specified shall be filled with particle or mineral board.
6.2.6 Lippings
Edges of all doors to be capped with 10mm thick lipping all round.
6.2.7 Fire resistant linings
Minimum 6mm approved mineral fibre board suitable for application in fire
resisting door construction. Products containing asbestos are not acceptable.
6.2.8 Intumescent strips
Single leaf fire doors shall be fitted with IF30/IF60 fire and smoke seals and
intumescent plugs to suit the particular requirement as manufactured by
Sealmaster Ltd, Cambridge CB2 4HG, England.
Double leaf fire doors and fire doors to CO2 protected areas shall be fitted with
N30/N601MN/IMP fire and smoke seals and intumescent plugs to suit the
particular requirement.
6.2.9 Door Louvre Panels
Door Louvers shall be extruded aluminium with finish to match the door. All
blades, frames and trim members shall be 6063.T52 alloy, minimum1.27mm
thick. All fastenings to be stainless steel or aluminium. A separate adjustable
trim member shall be supplied to securely and neatly clamp louvre trim
opening.
Interior trim frame to be secured by counter sunk Jackson head screws. All frames
and trim members to be mitred at corners and rigidly secured by corner brackets.
Louvers shall have sight-proof blade as Model DL-138 manufactured by
Construction Specialties, Inc. or equal and approved.
6.2.10 Door Weather Seals
Provide and fix aluminium threshold and jamb seals to external doors as
indicated on the schedules. Threshold seals shall be type B/BSD and jamb seals
type JMX as manufactured by Sealmaster U.K. or equal and approved with
powder coated finish to match window framing. The weather seals shall be
easily replaceable.
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6.2.11 Adhesives
Complying with BS 1204 : Part 1 and 2. Use external (type WPB) where
applicable.
6.2.12 Ironmongery
Ironmongery is covered by a prime cost sum, in BOQ and is to be selected at a
later stage. The following should however be considered in manufacture of
doors:
• Ironmongery will mainly be concealed type. The ironmongery shall
confirm to the operation requirements noted on the schedules and shall
maintain the dimensional stability of the composite door.
• The supply and installation of doors shall include for incorporation of
ironmongery.
6.2.13 Door Thresholds
External - As according to the details, shown in the drawings.
6.3 Execution - Doors
6.3.1 Workmanship
Workmanship generally to conform to BS 1186 : Part 2.
6.3.2 Door framing
Stiles and top rail to have a minimum width of 80mm; bottom rail minimum
200 mm unless indicated otherwise on the drawings. Provide adequate lock and
hinge rails/plates as required.
6.3.3 Jointing generally
Top and bottom rails to be either morticed and tenoned or dowelled.
Intermediate rails, glazing bars, etc., to be sub tenoned.
All contact surfaces of dowels, tenons and wedges to be glued with adhesives.
6.3.4 Fire doors
Fire rating of doors where applicable to be as indicated on the drawings or door
schedules. Such doors are to comply with the requirements of BS 476 : Part 8.
Construction to comply with the local Fire Prevention Officer’s requirements in
regard to stability, integrity and insulation.
Intumescent strips are required to all fire resisting doors and are to be fixed
continuously along all edges of frame.
6.3.5 Wooden door frames
Finished wooden door frames are to be screw/plug and pellet fixed to block
work/concrete walls only after completion of relating wall and floor finishes.
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6.3.6 Steel door frames
Build in metal door frames securing the frame to either block work or concrete
by any method recommended by the frame manufacturer which meets the
approval of the Engineer.
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7 Aluminium Doors & Windows
7.1 General
7.1.1 Scope of Work
Supply and installation of proprietary aluminium doors and windows.
7.2 Relevant standards
Conform to the recommendations of the following British Standards where
applicable:
BS 4873 Aluminium alloy windows
BS 1474 Wrought aluminium and aluminium alloys for general
engineering purposes.
BS 3987 Anodic oxide coating on wrought aluminium for external
architectural applications.
BS 5368 Method of testing windows
Part 1 : 1976
Part 2 : 1980
Part 3 : 1978
Air permeability test
Water-tightness test under static pressure
Wind resistance tests
BS 6375 Performance of windows
Part 1 : 1989
Part 2 : 1987
Classification for weather tightness
Specification for operation and strength
characteristics
BS 6496 : 1984 Specification for powder organic coating
7.2.1 Literature, Shop Drawings and Samples
Submit comprehensive technical literature giving details of all proposed doors
and windows for the prior approval of the Engineer.
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Submit illustrations and samples of various colours for selection by the
Engineer.
Submit shop drawings of the proposed doors and windows including
installation and fixing details for the Engineer’s approval.
After finalisation of all details, full sized samples, inclusive of all fixings,
ironmongery and other components shall be fabricated for approval by the
Engineer prior to full production for each window/door type.
7.2.2 Evidence of Performance
Provide independently certified evidence that all doors and windows comply
with specified performance requirements.
Provide evidence from the manufacturer of their suitability in terms of their
resistance to the action of the elements i.e. wind, rain, temperature, and general
structural integrity.
7.2.3 Storage and handling
All items described under this section shall be handled, delivered or stored in a
manner that will avoid damage, rust or deformation. Items shall be stored off-
ground and shall be entirely covered with weatherproof coverings in storage
area.
Items which become rusted or damaged because of non-compliance with those
conditions will be subject to rejection, and such items shall be replaced without
additional cost to the Employer.
All visible surfaces shall be protected by suitable low tack tape before delivery to
site.
7.2.4 Guarantee
Provide a 10 year guarantee for breakage, leakage etc. caused by manufacturing
and installation defects (guarantee excludes elastic sealant for installation).
7.3 Materials and Performance
7.3.1 Aluminium Windows and Doors
All aluminium windows and doors are to comply with the requirements of BS
4873 and BS 6375.
All frames shall be of rigid and robust construction with welded or mechanical
corners preventing torsion opening the corners when fitted in the building.
All opening lights are to be weather-stripped and meet the requirements of testing
as defined below:
(Test procedures BS 6375, Part 1)
Air permeability 600 Pa (special)
Water tightness 200 Pa
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Wind resistance 1600 Pa
Operation and strength performance to comply with BS 6375 : 1987, Part 2.
All doors and windows are to be supplied from their manufacturer complete with
all necessary glazing inserts, sealing strips, gaskets, weather strips, glazing beads
and all ironmongery as specified.
All exposed aluminium work shall have powder coated finish, colour to be selected
by the Engineer unless otherwise specified. The application process shall conform
to BS 6496. Submit details for process for approval prior to fabrication.
All external aluminium windows and doors to be complete with weather-seals,
thresholds, jamb seals and cills.
7.3.2 Ironmongery
Ironmongery will be mainly be concealed type. The ironmongery shall conform
to the operation requirements noted on the schedules and shall maintain the
dimensional stability of the window/door assembly.
The supply and installation of windows/door shall include for incorporation of
ironmongery.
Ironmongery is covered by a prime cost sum, refer B.O.Q and is to be selected
at a later stage. The following should be considered in manufacture of
windows:
• The openable windows will be provided with maintenance key operation
only.
• Ironmongery will mainly be of concealed type. The ironmongery shall
conform to the operation requirements noted on the schedules and shall
maintain the dimensional stability of the window assembly.
• The supply and installation of windows shall include for incorporation of
ironmongery.
7.3.3 Glazing
As noted in the schedules and as specified under “Glazing” section.
7.3.4 Weather Stripping
Chloroprene rubber, solid complying with BS 4255, Part 1 or cured ethylene
propylene diene monomer (EPDM).
7.3.5 Fixings
All fixings shall be stainless steel grade A4/316
7.3.6 Sills
Externally & Internally - Pre-cast concrete sills complying to Section- 4,
“Concrete”.
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7.4 Execution
7.4.1 Fabrication and delivery of aluminium elements
All jointing shall be tightly fitted and executed in an inconspicuous manner
with hairline joints. All panels shall have overlapped joints to prevent rocking
and to provide a positive weather seal. All weather stripping shall be easily
replaceable and securely fixed to avoid gaps at corners and joints.
Fabrication of all aluminium windows shall be carried out at the manufacturer’s
workshop/factory and be delivered to site only when complete and ready for
installation.
The units shall be transported, handled and stored in accordance with the manu-
facturer’s recommendations and the Contractor is responsible for ensuring that the
installed units are not damaged.
Before fixing any metal work which will be in direct contact with concrete should
have 2 coats of bitumen solution or mastic impregnated tape applied to the surface
of the components. Black bitumen coating solution shall be as for cold application
to BS 3416 type.
Any item delivered to the site which shows any defect or deformation will be
rejected.
7.4.2 Installation of aluminium windows and doors
Paint the backs of all aluminium frames and any other aluminium surface in
contact with different material with two coats of black bituminous paint to BS
3416 (or other approved protective coating) before installation to prevent
electrolytic action.
Ensure that adequate drainage holes if required are complete and neatly
finished before installation. Install the windows in accordance with the
approved shop drawings. Anchorages to be arranged, to allow for adjustment
with proper allowance for normal building movement.
Timber sub frames shall be hardwood complying with Section 16 of this
Specification plugged into the opening prior to fixing the window casement.
Fixing of frames for all units to the building shall be such to ensure solid, void
free, waterproof joints. Seal any gaps between frames and openings with
sealant in accordance with section 26.
7.4.3 Protection
Adequately protect finished surfaces against damage from subsequent building
operations such as plastering, etc. Carefully cover with masking tape or other
approved means.
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7.4.4 Completion
Before project handover remove all protective tape and clean exposed surfaces or
extraneous marks to the satisfaction of the Engineer.
Ease and adjust as necessary all opening lights and leave in perfect working
order.
7.5 Automatic doors
Automatic doors shall be installed as shown on the drawings.
7.5.1 Sliding Glass Doors
Automatic, sliding glass doors shall be as DORMA ST-G with all-glass section
system, or equal approved.
Doors shall be 2-leaf, with or without side panels according to location.
Glazing shall be laminated safety glass VSG.
Door operator shall be DORMA ES90/ES-100; modular design; complete with
microprocessor unit; closing force monitor; main and ancillary closing edges;
direction reversal on encountering obstruction.
In the event of power failure door should revert to closed position.
In the event of fire alarm activation, the door should revert to the open position.
Door should incorporate self-teach operator intelligence adjustable opening and
closing force, opening and closing creep speed, and hold-open timing.
Control programmes: Off-Auto-permanent open-Partial open-Exit only.
The following options are to be included:
• Electromechanical locking
• Internal manual lock
• Emergency power supply module
• Radar (microwave) detector
Colour: White RAL 9010.
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8 Ironmongery
8.1 General
8.1.1 Scope of Work
Supply and installation of all ironmongery as required for internal and external
doors, windows and the like.
8.1.2 Relevant British Standards
All items of ironmongery shall conform to the following standards where
applicable:
BS 1227:1967 Specifications for hinges
BS 3261:1980 Specification for thief-resistant locks
BS 4951:1978 Specification for builders’ hardware : lock and latch
furniture.
BS 5725:1981 Emergency exit devices
BS 5872:1980 Specification for locks and latches for doors in buildings
BS 6459:1984 Door closers
8.1.3 General Standard
Ironmongery shall be of type complying to British Standard or similar standard
specification shall be of the best quality obtainable from an approved
manufacturer, all to the approval of the Engineer.
8.1.4 Schedules
Provide full ironmongery schedules prepared by the approved ironmongery
manufacturer(s) for the Engineer’s approval. In compliance with the schedules
provided in the drawings. The requirements of hold-open doors, etc.as per
STET – Security Consultants requirements to be taken into consideration while
preparing the final schedule.
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8.1.5 Keys
All items of ironmongery with a locking device are to be provided with 4 No.
keys. These are to be handed over to the Engineer on completion of the contract
complete with the key tags.
8.1.6 Master key system
Contractor shall allow for the supply of a single step master key system. On
approval of the material proposed, master keys shall be directly supplied by the
manufacturer to the Client.
8.1.7 Literature and samples
Provide manufacturer’s literature and, if requested by the Engineer, samples of
ironmongery items proposed.
8.2 Materials
8.2.1 Ironmongery Items
All items of ironmongery are to be from one manufacturer.
All ironmongery used externally shall be of an approved non-ferrous type and
fixed with matching non-ferrous screws.
Ironmongery to be in brushed Stainless Steel matt finish. Handle levers to be in
solid stainless steel.
8.3 Execution
8.3.1 Installation
All items of ironmongery to be installed/fixed in accordance with the
manufacturer’s instructions and generally in compliance with best general
practice.
All cut outs, sinking, key access and spindle access holes shall be neat, tidy and
workmanlike. Fixing screws shall be non-ferrous driven properly and shall be
of the correct size to match the relevant fitting.
Hinges for doors shall be let into timber frames for the thickness of one leaf of
the hinge and let into the door or window shutter for the thickness of one leaf of
the hinge. The leaf of the hinge when fixed shall be flush with the timber
surface.
Ironmongery and furniture shall function smoothly and positively, without
undue pressure being required to operate the mechanism.
Ironmongery and furniture shall be left free of paint, stains, marks and damage.
Hinges shall be firmly screwed and free of packing. All hinge screws shall be
countersunk and flush fitting.
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8.3.2 Completion
Remove all ironmongery after first fix to allow completion of final decorations.
Re-fix, lubricate, clean and leave in perfect working order on completion, all to
the satisfaction of the Engineer.
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9 Glazing
9.1 General
9.1.1 Relevant British Standards and Codes
All items and work relating to glazing shall conform to the following British
Standards where applicable.
BS 952 : 1978/1980 Glass for glazing
BS 5713:1979 Specification for hermetically sealed flat double glazing
units
BS 6262: 1982 Code of practice for glazing of buildings
BS 6375 :1983/1987 Performance of Windows
9.1.2 Technical Literature
Submit detailed technical literature concerning the properties of the glass types
being proposed, as well as samples with the tender submission, for the review
and approval of the Engineer.
9.1.3 Guarantee
Provide a 10 year guarantee against leakage, failure of sealing and similar
manufacturing defects.
9.2 Materials
9.2.1 External Double Glazing
The standard double glazed assembly specified in the schedules for external doors
and windows shall be double glazing units with 6mm thick float glass external
panes, 6mm thick low emissive (Low E) inner glass panes, having the following
combined properties:-
a. Daylight transmittance 0.29 (minimum)
b. Daylight reflectance 0.13 (maximum)
c. Solar radiation transmittance 0.25 (maximum)
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d. Solar radiation reflectance 0.11 (minimum)
e. Solar radiation absorption 0.64 (minimum)
f. Solar radiation total transmittance 0.36 (maximum)
g. U-Value 3.15 w/m2k (maximum)
h. Shading coefficient total 0.41 (maximum)
i. Colour To approved sample
In addition the inner panel should be finished with an approved solar reflective
film to approved sample.
The assembly generally shall comprise 2 x 6mm thick panes with 10mm
airspace. The units shall incorporate a two part seal with continuous rolled
aluminium spacer in natural colour with a desiccant to keep the air in the unit
dry and free from organic vapours. The perimeter of the unit shall be
hermetically sealed with a two part system made up of butyl and a silicone seal
to BS 5713. Glass shall be annealed or toughened as recommended for specific
applications by BS 6262.
Double glazed panels in external doors shall be 6mm toughened safety glass.
9.2.2 External Single Glazing
Single glazed panels in external entrance doors shall be 12mm laminated glass
consisting of two 6mm layers of body tint anti-sun glass to match the window
external panes.
9.2.3 Internal Glazing
For internal fanlights to doors glass should be 6mm polished plate unless
otherwise noted on the drawings.
Decorative stained glass panels to internal doors shall be constructed with lead
cams in coloured body glass or Cathedral glass to design and colour approved
by the Client.
Panels shall be of the size and shape as shown on the detail drawings.
Clear glass used in doors shall be toughened glass or laminated glass in
accordance with the relevant BS and clearly identified as such on each panel.
9.2.4 Distance pieces, setting and location blocks
Small pieces of rot-proof non-absorbent material not hard enough to fracture
the glass as follows:
Distance pieces and location blocks - resilient material such as plasticized PVC
to BS 2571
Setting blocks - no compressible material such as sealed hardwood or rigid
nylon.
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9.2.5 Putty and Glazing Compound
Linseed oil putty shall conform to BS 544 : 1969.
Proprietary metal casement putty compound may be used in appropriate
locations subject to the approval of the Engineer.
Flexible glazing compound, glazing sealant, glazing tape, springs, spacers, etc.
May be used subject to the Engineer’s approval. They shall be proprietary
products suitable for the application proposed.
Any glazing compounds which are not to be painted should be submitted for
approval of their colour prior to ordering.
Wash leather for internal glazing shall be supplied and fitted as recommended
by the manufacturer.
Back bedding and pointing should be as per manufacturers specification.
9.2.6 Sprigs
Headless rustproof or non-ferrous nails.
9.3 Execution
9.3.1 Measuring glass
Before measuring check that surrounds, rebates and other surfaces are
dimensionally true, without distortion and fit for glazing.
Edge cover for single glazing should be in accordance with the following:-
Glass area in m2 Edge cover
up to 0.5 5mm
0.5 to 1.5 9mm
1.5 to 4 12mm
over 4 As recommended by sealant manufacturer
Edge cover and clearance for solar glazing to be as recommended by the
manufacturer.
Ensure that no voids or spaces are left in backing or bedding compounds and
when stripping surplus off this should be flush with top and side edges and
angles at the bottom to avoid water collection.
9.3.2 Cutting glass
Cut all glass and perform all edge and surface treatment at glass works. Cut to
produce clean square edges. Any work to toughened glass must be undertaken
by glass manufacturer prior to toughening process. Do not nip the edge of any
multiple glazed units.
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9.3.3 Preparing for glazing
Generally: Clean and dry rebates before priming or sealing and glazing. Check
that any unspecified primers/sealers/glazing compounds are compatible.
9.3.4 Preparing wood surrounds
For linseed oil putty : one coat of primer unless a pre-applied primer is in good
condition.
For metal casement putty and other glazing compounds : two coats of sealer.
9.3.5 Preparing metal surrounds
Coat the rebates if so required by the manufacturer of the surround or the
glazing compound.
9.3.6 Beads
Treat bedding surfaces of wood or metal beads as specified above for wood or
metal surrounds, as appropriate.
9.3.7 Preparing for adhesive sealants
a) Remove any protective coverings (e.g. tapes, wax coatings etc.).
b) Clean surfaces with a degreasing solvent and wash off.
c) Repeat (b) immediately before glazing but allowing time to dry.
9.3.8 Checking solar and tinted glass
These glasses are liable to fracture after glazing if edges are damaged. Take
precautions as follows:
a) Check the edge condition of any anti-sun, tinted or opaque glass exposed to
sunlight when fixed.
b) Reject any such glass if edges are shelled, vented or otherwise damaged.
c) Ensure that pane sizes allow for full specified edge clearance; edge nipping
is not permitted.
9.3.9 Location of glass in surrounds
Use 25mm long spacers to locate and prevent movement of glass or glazing
units over 0.2m2 in area as stated below.
Place setting blocks under bottom edge, sized and located as follows:
a) Width :Thickness of glass plus back clearance in order to locate the
block against the back of the rebate.
b) Thickness : to suit edge clearance specified in clause 13.3.1
c) Location : at the surround’s point of least deflection.
d) Location blocks
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Place at sides of panes or units in opening windows or doors, sized and located
as follows:
a) Width : as stated at 13.3.9 (a)
b) Thickness : to suit edge clearance specified in clause 13.3.1.
c) Location: at points which will restrict the likely sideways movement
(dropping) when the frame is opened.
9.3.10 Distance pieces
Place in pairs on both sides of bead fixed panes or units (except where
preformed tapes are specified) sized and located as follows:
a) Thickness : equal to the specified thickness of the glazing compound.
b) Width : depth of bedding less min. 3mm to ensure adequate cover.
c) Location : to coincide with bead fixing points but at maximum 300mm
centres and not coinciding with setting and location blocks. Where beads are
continuously fixed, locate about 50mm from each corner and then at 30mm
centres.
9.3.11 Wired or patterned glass
Locate panes with wires of a directional pattern parallel to the surround and
align with similar adjacent panes. Fix textured glass with smooth side
externally.
9.3.12 Glazing into rebates with beads
a) Generally: Bed the beads against the approved glazing compounds and tapes,
and securely fix to prevent movement. When the bead is internal, it need not be
bedded against the surround. Fix pins or screws at 75mm from each corner and
elsewhere not more than 200mm apart. If beads are prefixed, remove and re-
fix; provide additional matching fixings if necessary to attain secure fixing.
b) Internal glazing with tape : Fix to glass over full embedded surface and
trim surplus back to sight line.
c) Single glazing with putty : Fix the glass as follows:
i. Apply sufficient putty to rebate and insert setting and location blocks.
ii. Press glass into putty to form solid backing about 1.5mm thick
iii. Apply putty to glazed face to form adequate bedding for beads.
iv. Fix the beads
v. Strip surplus putty on both sides and finish to a smooth chamfer.
vi. Seal the putty to the glass with a light brushing.
d) Glazing with hand grade non-setting compound : Fix glass or insulating
units as follows:
i. Apply sufficient compound to rebate and insert setting and location
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blocks.
ii. Press glass into compound to form a solid backing about 3mm thick.
Insert distance pieces.
iii. Apply compound to glazed face to form adequate bedding for the
beads.
iv. Insert distance pieces in locations which oppose those already fixed.
v. Fix beads and, if uncapped, tool compound to a smooth chamfer on
both sides.
e) Glazing with two-part rubberizing compounds: Clean and prime all
surfaces. Thoroughly mix components and use during ‘open’ time. Clean
off compound at time of glazing, allow 7 to 14 days to cure and finally
clean.
9.3.13 Protection of putty
Protect with paint: Paint as soon as surface has hardened sufficiently, ensuring
paint seals putty to glass.
Leave opening lights closed until putty has hardened.
9.3.14 Protection
Protect all glazing during construction and as portions reach completion,
against any form of damage or deterioration. Such protection shall include
coverings, guard rails or other appropriate methods.
Particular attention is drawn to the need for the protection of solar reflective
glass from damage from mortar or similar splashes. Provide protection as
necessary.
9.3.15 “Glazing completed” indicators
Traditional white marks or adhesive stickers are permitted if they do not
damage the glass surface. Whiting is suitable but do not use alkaline material
(e.g. lime). Adhesive labels must be easily removable without scrapping. No
indicators of any sort are permitted on solar control glass.
9.3.16 Keep glass clean
Keep glass reasonably clean at all times. Clean and polish both sides of all
glasses and mirrors on completion.
9.3.17 Protect glass
Provide protection against mechanical damage. Protect against damaging
splashes and weld splatter etc. Remove any alkaline splashes before they
harden.
9.3.18 Test and replace glass
Test all glazing to ensure that it is weather tight. Replace defective or damaged
glazing elements to the satisfaction of the Engineer.
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9.4 Structural Glazing
Structural glazing, where specified or shown on the drawings shall be designed
and supplied by an approved specialist.
9.4.1 Core Application Rules for Building Façade
Glass panels are to be as shown on elevation. The glass joints to align with
stone / metal cladding joints
9.4.2 Technical Details
9.4.2.1 Aluminium Frame
The aluminium support frame for the glazing shall white powder coated.
Aluminium mullions as per manufacturers specifications.
9.4.2.2 Butt Joints
To be 19mm total width
9.4.2.3 Caulking
Grey sealant as Dow Corning 795: Grey or equal approved
9.4.2.4 Glass Specification
Glazing units shall be insulated, laminated low iron glass (e.g. Starphire)
comprised of 6mm glass with 12mm air space and 6mm low iron glass with
internal side.
Contractor shall provide a sample panel of the glass for approval of the
Engineer.
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10 Ceramic Tiling
10.1 General
The scope of work includes supply and installation of ceramic tiles for walls in
accordance with the finishes schedule mainly to the following
areas:
Bathroom and toilets
Kitchen and pantry areas
All other areas as shown in the finishing schedules
The tile material specification given in the following is intended for the purpose
of quoting for installation only. The actual tile material will be specified by the
interior designer in due time.
10.1.1 Relevant standards
Conform to the following British Standards and codes of practice where
applicable:
BS 5385 Wall and floor tiling
BS 5980 Specification for adhesive for use with ceramic tiles
and mosaics.
BS 8000, Part 2 Code of Practice for wall and floor tiling
BS 6431:Part 9:1984 Ceramic floor and wall tiles.
10.1.2 Samples and literature
Samples and/or literature of proposed adhesive, sealants and grouts to be
submitted to the Engineer for approval.
10.1.3 Shop drawings
Provide detailed shop drawings of the tiling installation for the approval of the
Interior Designer. Shop drawings are to show the following:
i. floor plans showing tile layouts, floor gulleys and any other relevant floor
fixtures.
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ii. Wall elevations showing tile layouts, mirrors, sanitary fixtures and any other,
relevant wall fixtures.
Tile designs will be issued by the Interior Designer prior to preparation of shop
drawings.
10.2 Materials
10.2.1 Tiles
Tiles shall comply with the following minimum requirements in all respects:
10.2.1.1 General Areas
Fully vitrified tiles conforming to R10, non-slip, resistant to oil, grease, and
lyes.
10.2.1.2 Fully vitrified ceramic floor tiles
Pressure strength min 150 N/m sqm.
Bending strength min 20N/m sqm.
Water absorption max. 3%
Abrasion (=wear group 4) max 12 cc/50 c sqm.
Note: In order to reach the necessary breaking and impact strengths, a
minimum thickness of 15mm is required.
All tiles to be submitted for Client approval.
10.2.2 Adhesives
10.2.2.1 Adhesives for floor tiling works
Thin set latex mortar composition adhesive shall be used in accordance with the
following characteristics:
Shear bond 3.5 MPa (500 psi)
Shear bond water immersion 2.3 Mpa (340 psi)
Water absorption 4% max
Compressive strength 34.5 Mpa (500 psi)
TLA service rating extra heavy
Tensile bond (BS 5890) 1575 N (355 lbs)
Shear adhesion (14 days) 22.8 kN95126 lbs)
Coefficient linear thermal expansion 65 x 10-7/(° F)
117 x 10-7/(° F)
All materials to be mixed and applied strictly in accordance with the
manufacturer’s written instructions.
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10.2.2.2 Grout Compounds
Grout system shall be epoxy based stainless grout. Grout shall comply with the
following characteristics:
Stainless, pigment free colourfast epoxy grout suitable for floor and wall
installations of ceramic tile, brick and stone.
Tensile strength 17.7 MPa (2577 psi)
Compressive strength 101 Mpa (14700 psi)
Thermal shock resistance 7.6 MPa (1100 psi)
Shrinkage 0.07%
Sag resistance pass
Water cleanability > 80 minutes
The completed system should carry a full warranty from the supplier.
10.2.2.3 Adhesives for bathroom areas
Adhesive shall be two part latext modified as per manufacturers specification.
10.2.2.4 Grout compounds for bathroom areas
Grout system shall be epoxy based stainless grout as per manufacturer's
specification. The grout shall comply with the following characteristics:
Stainless, pigment free, colour fast epoxy grout suitable for floor and wall
installations.
Tensile strength 11.7 MPa (1700 psi)
Compressive strength 51.7 Mpa (7500 psi)
Thermal shock resistance 7.6 MPa (1100 psi)
Shrinkage 0.19%
Sag resistance pass
Water cleanability > 80 minutes
10.2.3 Joint sealant, back-up strip, performed joint and grout
As recommended by BS 5385.
10.2.4 Cement
Ordinary Portland cement complying with BS 12 or Omani Standard No. OS7.
10.2.5 Sand
Clean sharp sand complying with BS 882 (grading Zone 2 or 3).
10.2.6 Water
Clean potable water shall comply with specification for Concrete Work.
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10.2.7 Mortar for floor tiles
Thin-set mortar as specified here in.
10.2.8 Separating membrane
Polythene sheet, 250 microns thick.
10.2.9 Grout
Proprietary grout as recommended by tile manufacturer. Colour to match the
tile and to the approval of the Engineer. The grout shall be water resistant.
10.3 Execution
10.3.1 Preparation
Ensure that surfaces which are to receive tiling are free from lose or friable
material, are perfectly clean and dry and will provide an adequate key for
bedding.
All surfaces to receive tiling to be left for at least 14 days after erection/ casting
before tiling work is commenced.
10.3.2 Setting out
Carefully set out tiling joints prior to starting to minimise tile cutting; avoid
unduly narrow cut-off; and ensure alignment of vertical and horizontal joints.
All wall tiling shall be laid with continuous joints running in both directions
unless otherwise instructed by the Engineer.
10.3.3 Tolerances
The maximum permitted tolerance for finished tiling will be 3mm when
measured under a 3m straight edge unless specified otherwise.
10.3.4 Fixing of wall tiles
10.3.4.1 Fixing Pattern
Tiling work to the walls shall be laid in orthogonal or diagonal pattern or as
indicated in the drawings. The width of the borders shall be adjusted
individually to suit the laying of the tiles. (Pattern to Architect’s drawing).
The joints of the border tiles shall correspond to the joints of the adjacent
border tiles.
Where pattern are indicated to be diagonally laid, the setting out of the diagonal
grid shall start from the central axes of a wall or as indicated on the respective
drawings. All tiles must be laid in a full square pieces or a half-diagonal piece
at 45 degree angle, with no exception. However, all borders width must not be
more than half the diagonal measurement of a tile.
Where patterns are indicated to be laid in orthogonal pattern to the axes, it must
be laid parallel to the axes, the setting out shall start from the central axes of a
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wall or as indicated on the respective drawings. The joints of all tiles must
correspond to the joints of the adjacent tiles.
10.3.5 Fixing of wall tiles
10.3.5.1 Thick bed adhesive method
Generally wall tiles are to be fixed using the thick bed method as detailed by
BS 5385: Part 1.
Apply adhesive as a floated coat to a thickness of approximately 6mm or as
recommended by adhesive manufacturer.
Press tiles, which must be perfectly dry, firmly into position within stated
working time of adhesive. Tiles may be buttered prior to fixing if so
recommended by adhesive manufacturer.
Use adhesive in strict accordance with manufacturer’s instructions.
Note: Alternative wall tile fixing methods (thin bed systems or sand/ cement
mortar system) may be used only if so approved by the Engineer.
10.3.5.2 Cement mortar method
Setting out on site shall be to Engineer’s approval in accordance with approved
drawings.
Wall tiles shall conform to BS 6431 including all angle fillets, beads, etc. Tiles
shall be obtained from a maker approved by the Engineer. Corner tiles shall have
finished edges.
Thin bed tile adhesives shall conform to BS 5980. Grout shall be to the approval of
the Engineer.
Jointing mastic shall be a 2-pack polysulphide mastic conforming to BS 4254.
Wall tiling shall be carried out in compliance with BS 5385 for internal wall
tiling in normal conditions.
Tiling shall be applied to rendered block or concrete walls which have been
allowed to thoroughly cure and dry initially for at least two weeks. Unless
otherwise scheduled, glazed tiles shall be applied to a rendered surface.
Preparation for wall tiling shall be generally as for internal wall finishes for
preparing the background.
Tiling requires true vertical and horizontal alignment of the tiling base. A
render coat should be applied as a levelling course. Permitted deviation is 3mm
over a 2m long straight edge.
After preparation the wall surface apply a scratch coat of 1:3, cement: sand (0-
4mm) omitting any lime additives. This coat to be 3-4 mm thick.
Following the scratch coat apply a render coat of 1:3 or 1:4 cement: sand mix
(sand 0.2mm) or a proprietary adhesive in accordance with BS 5980 and
approved by the Engineer.
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Before fixing, tiles should be soaked in water and then allowed to drain for a
minimum of 15 minutes until surface water is removed.
If a cement mortar method is used, fixing should commence within two hours
of laying the scratch coat.
Care should be taken not to spread mortar or adhesive over too large a wall area
in advance and it is important to check the bonding as the work proceeds by
regularly detaching a tile to ensure that at least 65% of the tile back is covered
by mortar or adhesive.
Wall tiles should be laid after floor tiles and butt against them neatly. In areas
where the floor tiles has a coved skirting, the skirting may be laid first.
Movement joints shall carry through backgrounds to backing structure. Insert
backing strip and seal joints with sealing compound to finish flush with surface
of tiles.
Corner tiles shall accurately fixed to blend with the surrounding tile work.
Joints shall be sharp and well defined.
Joints between tiles shall be grouted, not less than 12 hours nor more than 24
hours after the tiles have set, with non-staining white cement applied with a
brush to fill thoroughly all joints.
Tiles shall be cleaned, taking care to avoid damaging their surface, using one
part muratic acid to 10 parts of water. Excess grout shall be removed before it
has time to set.
10.3.6 Fixing of floor tiles
10.3.6.1 Fixing Pattern
Tiling work to the floors shall be laid in orthogonal or diagonal pattern or as
indicated on the drawings. The width of the borders shall be adjusted
individually to suit the laying of the tiles. The joints of the border tiles shall
correspond to the joints of the adjacent border tiles of the wall.
Where pattern are indicated to be diagonally laid, the setting out of the diagonal
grid shall start from the central axes of a room or as indicated on the respective
drawings. All tiles must be laid in a full square pieces or a half-diagonal piece
at 45 degree angle, with no exception. However, all borders width must not be
more than half the diagonal measurement of a tile.
Where patterns are indicated to be laid in orthogonal pattern to the axes, it must
be laid parallel to the axes, setting out shall start from the central axes of the
room or as indicated on the respective drawings.
The joints of all tiles installed on the floor shall be in line with the installation
of the tiles on the walls and threshold tiles, or as indicated on the drawings.
Where the tile floors meet the plaster walls a 150mm width matching tile
skirting, unless otherwise specified, shall be installed to the plaster walls. The
joints of the wall/skirting tiles shall correspond to the joints of the border tiles.
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10.3.6.2 Fixing Methods
Any of the three following methods (thin bed system or sand/cement mortar
systems) may be used if so approved by the Engineer.
a) Thin bed method
Prepare base according to adhesive manufacturer’s instructions and apply
adhesive direct to dry base in a layer not exceeding (5mm). Lay dry tiles onto
bedding and tamp down (or butter backs of tiles with bedding and tamp down
(or butter backs of tiles with adhesive, apply tiles direct to prepared base and
tamp down). Leave joints to 3 mm (minimum) between tiles.
In all cases ensure that tiles are solidly bedded without the formation of air
pockets.
10.3.7 Quality of tiling
All joints in tiles to be flush. Cutting and fitting of tiles to be done neatly and
to connect closely with abutting work. All cuts to be rubbed smooth with a fine
stone.
Provide and install round-edge tiles to the top course of all tiled areas and to
any exposed vertical edges.
Tiles are to be fitted sufficiently close to plumbing fixtures, outlets, pipes, recessed
accessories or other adjacent elements to ensure coverage of the joints by related
plates or covers.
Floor tiles to be laid to falls where required.
Round edge tiles to be provided where such edges would be exposed to view.
10.3.8 Grouting
Joints between the tiles shall be grouted not less than 12 hours and not more
than 24 hours after the tile is set. Before the grout has set the joints are to be
tooled and compacted and the excess grout to be washed and sponged from
all sources, care being taken to avoid damage to the tiles, in accordance with
the grout suppliers instructions.
10.3.9 Movement joints
Provide movement joints to the full depth of the finish at all wall/floor and
wall/ceiling junctions and elsewhere as specified on the Drawings or as
instructed by the Engineer. Movement joints to be to the full depth of the finish
and all in accordance with the recommendations of BS CP 202.
10.3.10 Tiled access panels
Provide tiled access panels in tiled areas where access to concealed valves,
traps and other similar items as required. Access panel shall be proprietary
items such as “Frost” touch latch access doors as specified by F.C. Frost Ltd,
U.K. Future Maintenance.
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10.3.11 Completion
Thoroughly clean completed tile surface using one part muratic acid to ten parts
of water if necessary. Leave tiling free of all imperfections to the satisfaction of
the Engineer.
10.3.12 Future Maintenance
As part of the contract, the Contractor shall store in a suitable place as advised
by the Engineer/Client an additional 10% of the quantity of tiles used, for
future use.
10.4 Special Requirements
10.4.1 Generally
The following specification notes refer specifically to the Entrance lobbies and
associated areas. It is the responsibility of the Contractor to ensure that the
materials supplied are fit for purpose and to the approval of the Engineer.
All floors shall be true and level unless specified otherwise. Transitions
between different floor finishes should be flush and level.
Supply and fix stainless steel finishing strips between all floor element finishes.
The strip shall be Ti-Lock or equal approved and 6mm thick to approved
sample.
Grouts should match the colour of the selected floor tile and be in accordance
with the detailed specification.
Tiles in showroom area shall be laid in running bond. Rectangular tiles shall be
laid with the longest edge of the tile parallel to the main entrance.
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11 Hard Floor Tiling
11.1 General
11.1.1 Scope of Work
The scope includes supply and installation of hard floor tiles to the following
main areas:
The Contractor should refer to the finishes schedule for details of specific tiling
areas.
Ceramic tile flooring is specified under Section 14 ‘Ceramic Tiling’. The tile
specification given in the following is intended for the purpose of quoting for
installation only. The actual material will be specified by the Engineer in due
course.
11.1.2 Relevant British Standards
Conform to the recommendations of the following British Standards where
applicable:
BS 8000, Part II Code of Practice for Wall and Floor Tiling
BS 4131 Terrazzo tiles
11.1.3 Literature and samples
Provide comprehensive technical literature on all proposed floor tiling products
together with illustrations of all colours/patterns/textures available.
Selection of all material shall be to the approval of the Engineer.
11.1.4 Shop drawings
Provide detailed shop drawings showing patterned floor tiling where called for
on the drawings, for the approval of Engineer.
11.2 Materials
11.2.1 Terrazzo tiles
The pre-cast terrazzo tiles and skirting shall be made from cement and coloured
stone chipping as approved by the Engineer and manufactured in the Sultanate
of Oman to comply with Omani Standard OS 3 and BS 4131:1973. The tiles
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shall be polished hard, durable and non-absorbent, of exact shape and even
thickness and shall have sharp true edges and be the best of their respective
types.
Floor tiles: 300 x 300 x 20mm pre-cast terrazzo floor tile with fine grit finish.
Stair treads: 600 x 275 x 30mm round edged tiles with two 5 x 5mm non-slip
grooves shall be used for stair treads.
Colour, size of chips etc. to be specified by the Engineer at later date.
11.2.2 Marble Tiles or granite
20mm thick natural imported marble or granite tiles as noted in the finishes
schedules. Standard size to be 300 x 300mm or 300 x 600mm unless otherwise
indicated on the drawings.
Where used as a finish for stair treads the marble is to be 30mm thick to the
profile shown on the drawings, and with a grit blasted flamed finish non-slip
strip 40mm wide 20mm behind the nosing.
11.2.3 Skirting
Terrazzo : 300 x 150mm high, 20mm thick with chamfered top edge.
Skirting in conjunction with marble or granite finishes shall be 300x150mm
high and finished in the same material as the floor.
Top edges of all skirting shall be chamfered or moulded to approved sample.
11.2.4 Non-slip Tiles and Skirting
Shower, bathroom and kitchen areas shall have an approved fully vitrified
ceramic non-slip tile to approved colour and texture.
11.2.5 Cement
Ordinary Portland Cement to BS 12:1978, or Omani Standard No. OS7.
11.2.6 Sand
Clean sharp sand complying with BS 882:1983 (grading Zone 2 or 3)
11.2.7 Water
Clean potable water to comply with concrete specification.
11.2.8 Separating membrane
Polythene sheet, 250 mµ thick.
11.2.9 Adhesives and Grouts
Adhesives and grouts should be fit for purpose in each area of use.
The following performance characteristics should be met:
• High compressive strength adhesive to take the weight of vehicles.
• High shear bond strength.
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• Adhesive must be flexible to accommodate any vibration movement and
impact.
• Grout to have a high compressive strength as well as being flexible.
• Grout to have high abrasion resistance.
• Grout to be stain resistant.
11.2.10 Adhesive System
Adhesive shall comprise of a “thin set” type bonding medium comprising latex
adhesive with an inert filler powder; as per manufacturers specification.
11.3 Execution
11.3.1 Preparation
Ensure that all sub-bases for tiling (generally screeds) are thoroughly clean, dry
and laid to the required levels and falls where applicable, before tiling work is
commenced.
All surfaces which are to receive tiling to be left for at least 14 days after
erection/ casting before tiling work is commenced.
11.3.2 Setting out
Lay out flooring material loose before cutting to approved layout/ pattern.
Lay out material to minimise cutting and avoid unduly narrow or small cut-offs.
Unless otherwise indicated on the drawings lay tiles with continuous joints
running in both directions.
11.3.3 Laying of hard floor tiles
Refer to Section 15 - fixing of floor tiles.
Refer to finishes schedules for location and type.
For terrazzo any of the above three approved methods of fixing may be
employed.
11.3.4 Quality of tiling installation
The maximum permitted deviation from level will be 3mm under a 3m straight
edge in any direction taking into account drainage falls where applicable.
Where cut tiles are necessary they shall be carefully cut with a suitable tool and
rough edges rubbed smooth. Cut tiles which do not fit correctly shall be
replaced with properly cut tiles.
Ensure solid bedding of all tiles. Hollow sounding tiles to be replaced.
11.3.5 Grouting
Leave tiles for at least 12 hours before grouting joints.
Work grout well into joints until flush with face of tiles. Clean off surplus grout
and thoroughly clean surface to leave neat crisp edged joints.
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Grouting procedure to be undertaken strictly in accordance with manufacturer’s
recommendations.
11.3.6 Movement joints/separating strips
Provide movement joints to the full depth of tile and bedding at all wall/floor
junctions and elsewhere if specified or so requested by the Engineer.
At wall junctions leave this joint empty of material ready for concealment by
the skirting. Elsewhere joints to be sealed with backing material and sealant.
Install separating strips where hard flooring tiles abut other floor finishes or
elsewhere as shown on the drawings. Ensure separating strips are perfectly
flush with the tile surface.
11.3.7 Terrazzo polishing
All terrazzo surfaces are to be polished on completion. Large areas shall be wet
polished by means of approved machines using a No.140 carborundum wheel.
Any surfaces too small for convenient machine polishing may be polished by hand,
using a No. 140 carborundum stone and water. Care must be taken during any
polishing operation not to damage any angles or arrases.
11.3.8 Skirting
Skirting shall be laid in such a manner that their vertical joints coincide with
the horizontal joints in the floor tiles. The abutments against door frames shall
be neatly formed.
11.3.9 Exposed stair treads
Lay the outer (exposed) treads on a thin - bed of two part epoxy adhesive, all as
detailed on the drawings.
11.3.10 Completion
Leave floor finish clean and adequately protect the installation until handover.
11.3.11 Future Maintenance
As part of the contract, the Contractor shall store in a suitable place as advised
by the Engineer/Client an additional 10% of the quantity of tiles used, for
future use.
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12 Concrete/Screed Hardener
12.1 General
12.1.1 Scope of Work
Supply and installation of premixed dry shake surface floor hardener to
concrete floors, screed and skirtings in the following main areas, refer finishes
schedule for details.
Hardened concrete floor areas
• Basement car park and plant areas generally
Conform to the recommendations of relevant British Standards and Codes of
Practice where applicable.
12.1.2 Submittals
Submit full details of the proposed products for the approval of the Engineer.
Prepare a 1m x 1m sample of the proposed product for the Engineer’s approval.
12.2 Materials
12.2.1 Hardener
Proprietary ready to use blend of non-metallic rust free aggregate and cement to
be applied as a dry shake to the surface of wet concrete.
Compressive Strength 70 N/mm2 (Min) or higher to Engineer’s requirements
Chemical resistance Resistant to motor oils, mineral oils, hydraulic fuels
Coverage 10 kg/m2 generally; 2.5 kg/linear metre in 80mm
wide strips either side of expansion joints.
12.2.2 Sealer
Curing compound as recommended by manufacturer for non-slip finish.
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12.3 Execution
12.3.1 Installation
Apply screed hardener and sealing coat in strict accordance with the
manufacturer’s written instructions.
Hardened - power float hardener to a smooth, non-slip finish and apply one
coat of sealant. Apply a second sealing coat as a finished surface coating.
12.3.2 On completion
Protect from traffic until fully cured.
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13 Suspended Ceilings
13.1 General
13.1.1 Scope of Work
Suspended ceilings shall be as specified in Schedule of Finishes..
13.1.2 Relevant standards
Conform to the recommendations of the following British Standards and Codes
of practice where applicable:
BS 1191 Specification for Gypsum Building Plasters
BS 1230, Part 1 Gypsum Plasterboard
BS 8000, Part 10 Code of Practice for Plastering and Rendering.
BS 8212 Code of Practice for dry lining and partitioning using
gypsum plasterboard.
CP 290 Code of Practice for Suspended ceiling and linings of
any dry construction using metal fixing systems.
13.1.3 Fire resisting properties
The exposed surfaces of all suspended ceilings are to have “Class O” surface
spread of flame all in compliance with the requirements of the local Fire
Prevention Officer.
In addition the completed proprietary suspended ceiling assemblies are to
provide half an hour fire resistance when tested in compliance with the
requirements of the local Fire Prevention Officer.
13.1.4 Literature and samples.
Provide comprehensive technical literature fully explaining the proposed
ceiling installations for the approval of the Engineer.
Provide samples of various tile finishes, colours, textures and patterns for
selection by the Engineer.
Complete sample trial area, corner 3 x 3m prior to commencement of work.
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13.1.5 Shop drawings
Provide shop drawings of the proposed suspended ceiling installation for the
approval of the Engineer. Shop drawings shall include the following
information:
- Room layouts with reflected ceiling plan showing locations of all ceiling
mounted items such as light fixtures, a/c diffusers, smoke detectors, etc.
- Also indicate all other items which are to be located within ceiling space
(such as A/C units).
- Method and location of anchorages to structure.
- Location, size and detailing of access panels.
- Location and detailing of movement joints.
13.1.6 Personnel
Installation of all suspended ceilings shall be carried out by suitably experienced
tradesmen or in the case of proprietary ceilings a franchised applicator of the
ceiling manufacturer all to the approval of the Engineer.
13.2 Materials
13.2.1 Plasterboard
Plasterboard suspended ceilings shall comprise12.5mm thick standard and for
bathroom and wet room moisture resistant plasterboard all with tapered edges
or similar plasterboard which conforms to BS 1230 to the approval of the
Engineer on proprietary galvanised steel or aluminium suspension system..
Where specified for external use plasterboard to be approved exterior quality
gypsum ceiling board.
13.2.2 Ceiling Tiles
13.2.2.1 Steel Ceiling Tiles
Metal ceiling tiles; FERRO- Anti Bacterial F90 600 x 600 clip-in system as per
manufacturers’ specification.
Colour : To engineer's approval.
Tiles to be machine cut at all extremities.
Tiles to be set-out and co-ordinated with all service location points and lighting
layout.
Contractor shall prepare a detailed co-ordinated setting out plan for Engineer’s
approval.
13.2.2.2 Perforated Metal Ceilings
Perforated metal ceiling tiles as per manufacturers specification.
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Colour : To engineer's approval.
Comprising Q-clip suspension system, perimeter trims, access panels for
services. Electrolytically galvanised steel 0.5mm, micro-perforated Rd 1522 to
give alpha sound absorbtion of between 0.66 and 125 and 5000 Hz to DIN
52212.
13.2.2.3 Plain Metal Tile Ceiling
Plain polyester powder coated ceiling tiles; 600 x 600; exposed lay-in grid, to
approved sample.
13.2.2.4 Mineral fibre ceiling tiles
Mineral fibre tiles as per manufacturers specification. Pattern to be fissured or
similar to approved sample.
13.2.3 Stonewool
Stonewool proprietary suspended ceiling on proprietary galvanised steel or
aluminium suspension system.
Ceiling tile to be 18mm hygienic as per manufacturer's specification.
Plasterboard-related materials
Plasterboard nails: Galvanised or otherwise zinc coated steel with 2.5mm
minimum shank diameter and 7mm minimum head diameter; lengths as BS
8212 clause 6.3.
Jointing accessories
As follows:
a) Jointing compounds for bedding and finishing joints to comply with BS
6214.
b) Joint reinforcing tape to comply with BS 6214.
c) External angle : paper tape reinforced on both edges with zinc coated flexible
steel strip bonded to the paper.
d) Edge and corner beads : galvanised steel to BS 6452 : Part 1
13.2.4 Access
Unless the ceiling systems is fully accessible, access panels shall be provided
and installed to allow access to mechanical, electrical and any other
appurtenance within the ceiling void. Such access panels shall be of
proprietary type with hinges as supplied by “Arrow” type CD/PB/SB or
CP/PB/SB/F sizes to suit access purpose or equal and approved finished flush
with appropriate trim. Fire rating to match remaining ceiling installation.
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13.3 Execution
13.3.1 Setting Out
Set out the work with the following objectives:
a) To establish the correct ceiling level.
b) To establish panel centres and joint lines, etc including the layout at obstructions and in irregular areas.
c) To avoid or minimise cutting of ceiling panels.
d) To agree the positions of access panels, luminaires, grilles and other services equipment, fire checks and everything else that affects setting out.
e) To establish the location of all battens and other fixing points.
13.3.2 Installation
Install all ceilings complete and securely fix all components all in accordance with
the manufacturer’s written instructions.
Also comply with the following:
a) Erect the suspension system complete with hangers, primary grid and ceiling
grid.
b) Provide additional suspension for luminaires, grilles, ducts and other
equipment to be supported, including adaptation and span bars, etc where
necessary.
c) Adapt the system for obstructions, bulkheads and sloping sections.
d) Fix fire stopping and insulation
e) Fix all perimeter supports
f) Fix the ceiling panels and tiles including access panels, luminaires and
other equipment including that provided by others.
g) Fix perimeter and other trim
h) Check and adjust as necessary and leave truly level
i) Tolerance shall be 3mm in 3m
j) Do not anchor hangers to equipment, pipes, conduits or other
appurtenances.
k) Incorporate light fittings, a/c units, heat detectors and any other ceiling-
related items in accordance with the approved shop drawings and in
compliance with the related manufacturer’s instructions.
l) Carefully and neatly trim around appurtenances penetrating the ceiling
surface providing custom steel trims where necessary. Provide additional
support to adjacent ceiling areas as required.
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13.3.3 Plasterboard ceilings generally
Comply with BS 8212 subject to any qualifications given below.
The entire suspended ceiling system should be carried out in accordance with
the manufacturer’s instructions where appropriate and as directed by the
architect where necessary to suit site conditions.
13.3.4 Plasterboard suspension system installation
The installation of the ceiling suspension system and the fixing and finishing of
the plasterboard is to be carried out in strict accordance with the manufacturer’s
instructions.
a) Install suspension system in accordance with approved shop drawings.
b) Secure 75 x 75mm hardwood perimeter trim, perimeter channels and soffit
cleats as required avoiding the use of, or interference with, any mechanical
or electrical device already in place.
c) Ensure entirely assembly, including timber framing where necessary, is firmly
fixed and forms a rigid assembly ready for the installation of the
plasterboard.
d) Frame around and provide rigid support to any ceiling mounted fitting,
including access panels where required.
e) The acceptable dimensional tolerance for the assembly is 3mm in 3m.
13.3.5 Plasterboard installation
a) The ceiling should be set to the heights shown on the Drawings and should
be true and level.
b) Secure plasterboard using approved self-tapping galvanised screws to metal
framework at maximum 230mm centres. Neatly trim around ceiling mounted
fixtures and other appurtenances penetrating the ceiling. Provide and fix trims as necessary.
All end joints shall be broken over successive courses and located over a
support. Ends of sheets shall be tightly butted and edges lightly butted, the
sheets being fixed at 100 mm intervals. Fixings shall be not less than 9 mm
from edges of sheets. Where sheeting has been cut, fixings shall not be less
than 18 mm from cut edges. Fixings shall be well driven home with heads
slightly below the surface, but shall not break the paper. Punches shall not
be used. All angles between bulkheads and ceiling and all vertical angles
shall be reinforced with 90 mm wide jute scrim set in plaster and trowelled
flat.
c) Finish all fixing devices, taped joints and edges as recommended by
manufacturer to leave a perfectly smooth clean and neat finish without
defects ready for painting.
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13.3.6 Painting / Finish
Proceed with painting of ceiling surface as soon as possible after installation.
Refer “Painting Section” for painting specification.
Stone wool ceiling to be finished by cleaning only. If painting is required,
special acoustic paint supplied by the manufacturer to be used.
13.3.7 Completion of suspended ceilings
Ensure the completed ceilings are thoroughly clean and to the satisfaction of
the Engineer before handover.
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14 Raised Access Flooring
14.1 General
14.1.1 Scope of Work
Supply and installation of Raised access floor system in areas specified in the
drawings, schedules and specifications.
14.1.2 Relevant Standards
BSEN 12825 : Raised Access flooring to be tested and classified in accordance
with the requirements specified therein.
BSEN ISO 140-12 : Sound transmission to be in accordance to standards
mentioned therein.
BS 476-20: Thermal Properties to be in accordance to standards mentioned
therein.
14.1.3 Literature & samples
Provide comprehensive technical literature and samples of proposed system.
Submit full details of the proprietary system being proposed for the Engineer’s
approval.
Submit detailed setting out drawings showing the location of all pedestals,
ductwork, floor outlets, trunking and other related service elements for the
Engineer’s approval
14.2 Materials
Proprietary raised access-flooring system comprising pedestals and removable
insert panels complete with all necessary services appurtenances including
grilles, trunking etc.
Pedestals shall be adjustable to the tolerances required for the installation and
to be manufactured in accordance with the following materials.
Raised access floor system to be of heavy duty type to have an overall finished
height of 600mm and 1000mm as noted on the dwgs. and as supplied by Joint
Venture Production from UK or equal approved.
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Panels to be heavy grade of size 600x600x29mm thick in Calcium Sulphate to
take finishes as specified in finishes schedules dwgs. 210184- A-500 to
210184- A-502.
Tolerances:
Length of side - +/- 0.4 mm
Squareness - +/- 0.5 mm
Straightness of side - +/- 0.5 mm
Thickness - +/- 0.3 mm
Twist - +/- 0.7 mm
Vertical warping – 0.6mm
Casing finish – Galvanized
Casing material – steel
Core material – high strength particle board
Structural Perfomance:
Ultimate Load: in excess of 9KN
Working Load: Point load
General Areas - 4.5 kN(25mm x 25mm),
Corridors, 4th Floor and Data Centre areas - 12 kN (25mm x 25mm)
Deflection max. under working load condition: 2.5mm
Fire Perfomance:
Standard, Class O as outlined by UK building regulations
Fire resistance, small scale fire test.
Thermal properties to conform to BS 476-20
Sound transmission:
Sound transmission to conform to BSEN ISO 140-12.
All materials used in raised floor system shall be resistant to growth of fungi
and micro organisms and attack by insects.
Floor panels to be finished with marble, ceramic tiles, 2mm thick anti static
vinyltiles, carpet ties, etc. all as per as per finishes schedule.
Wear rating to be K5, complying with EN 649 and the International Computer
Manufacturer’s standards BS CEC 00015 & DN 51953 which require electrical
readings between 5x105 hours and 2x 1010 hours.
14.3 Installation
Pedestals to be fixed with screws in accordance with the manufacturer’s
specifications. Adjustability to be +/- 40mm. Locking to be by locknut.
Cut panels at perimeter edging to be sealed with class O Aluminium foil tape.
Floor panel location method to be positive.
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Installation to be carried out by either of the specialist installation companies
listed below:
A. Access Flooring Ltd
The Studio
15 Huntsmead
Northamton
NN3 5HT
England
B. JS Flooring
27 Westrow Gardens
Seven Kings
Ilford, Essex
IG3 9NE
England
C. Level 1 Raised Flooring Ltd
21 Bonney Street
Upper norwood
London
SE19 3RW
England
All substantial metal parts to be electrically continuous and fully bonded in
accordance with latest edition of IEE regulations.
Permissible deviation of locks i.e. level as advised by AFA code of practice to
be +/- 1.5mm over a length of 3.0 m.
14.4 Inspection and Testing
Raised access flooring to be tested and classified in accordance with the
requirements of BSEN 12825. Completed installation to be clean, stable and
free from bounce and vibration. No lipping to be provided for floor panels.
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15 Demountable Partitions
15.1 Scope of Work
The scope of work is for the supply and installation of proprietary demountable
partitions, wall linings and related doors all as detailed on the drawings.
15.2 Standards
Comply with the requirements of British Standard BS 5234 :1975, Code of
Practice for Internal Non-Load bearing Partitions.
15.3 Submittals
Submit full details of the proprietary system being proposed for the Engineer’s
approval.
Submit detailed drawings of the proposed layout including all elevations and
relevant details for the Engineer’s approval.
Submit samples of the samples of the system and alternative finished if so
requested by the Engineer.
15.4 Materials
15.4.1 Partitons
Proprietary demountable (readily Adaptable) partition system comprising
exposed white anodised extruded steel posts and rails with either solid or
glazed panels. Solid panels to be 2 x 13mm plasterboard sheeting with factory
applied colours vinyl fabric finish, with a core of 50mm mineral wool. Glazing
to be where shown on the drawings. Glass throughout to be 6mm clear except
to corridor walls where it is to be 6mm clear Georgian-wired.
Partition system to be equal or superior to “DEKO 1090 by Deko Partitions
Ltd.”
Fire rating of all partitions to be FR30 (1/2 hour fire resisting), as determined in
accordance with BS476: Part 8:1972.
Surface spread of flame to be Class O determined in accordance with BS 476:
Part 7: 1971
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The noise reduction index of the completed solid partition shall be a minimum
of 40 db. A glazed partition shall be a minimum of 38db.
The system is to be suitable for use with the relating ceiling installations,
complying generally with the details shown on the drawings.
The proprietary system is to allow the fitting of arrange of accessories also
available from the partition manufacturer. Such items are to include wall –hung
cabinets, drawers, shelves, computer desks, hanging rails, signs, pinboards, etc.
15.4.2 Wall Linings
Proprietary wall lining system to match the demountable partition system-
“DEKO 590 by Deko partitions Ltd” or equal and approved.
15.4.3 Partition Doors
Proprietary wooden framed mahogany veneered and glazed doors as supplied
by approved partition manufacturer.
Refer to Section 17- Wooden Doors for details.
Note that all wooden doors regardless of finish or location are to be supplied by
the approved partition manufacturer.
Doors are to be supplied complete with hinges as recommended and supplied
by partition manufacturer. The supply and fixing of all other ironmongery items
is covered by a provisional sum-refer to Bill of Quantities.
15.5 Installation
Install all partitions, wall linings and related doors and such assemblies in strict
accordance with the manufacturers instructions and to the complete satisfaction
of the Engineer.
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16 Painting
16.1 General
16.1.1 Scope of Work
The painting work includes the following main items:
• Exterior paint to surfaces where specified.
• Interior paint of ceilings and walls
• Painting of doors and windows
• Protection of timber
The exterior paint systems shall be provided with a 3 year warranty.
16.1.2 Relevant British Standards
Conform to the recommendations of the following British Standards where
applicable:
BS 3900 Methods of Test for Paints
BS 6150 Code of Practice for painting of buildings.
BS 5589 Code of practice for the preservation of timber
BS 5493 Etch Primer
16.1.3 Labour
Only workmen skilled in painting are to be employed for the purpose of
painting.
16.1.4 Accessories
All necessary tools, appliances, scaffolding and other accessories required to
complete the work shall be provided by the Contractor.
16.1.5 Removal of Related Items
All items relating to painted surfaces such as ironmongery, light fixtures,
switch plates etc. shall be removed before preparatory work is commenced.
Clean and re-fix such items on completion.
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The final interior paint coat is to be applied in co-ordination with the interior
works.
16.1.6 Protection
Clean dust sheets are to be used for the adequate protection of floors,
fixtures and surfaces not to be painted.
16.1.7 Approvals
Submit to the Engineer duplicate copies of paint system sheets relating to each
of the paints proposed for use. These shall be accompanied by the
manufacturer’s paint data sheet which show the manufacturer’s name, the brand
name, reference number, colour and description of the paint, the surface
preparation to which it is to be applied, the method and location of application,
the minimum dry film thickness, the coverage per litre and the number of coats
to be applied, all to the Engineer’s requirements. Following the Engineer’s
written approval the requirements of the paint system shall be adopted for the
works.
Ensure that the paint manufacturer’s data sheets cover the conditions at works
or at site, including temperature and humidity, under which the paints are to be
applied. Any addition of thinners must be made in the store under the
supervision of the Engineer and only as allowed by the manufacturer’s data
sheet.
16.1.8 Samples
Provide finished samples of minimum size 3m x 3m of paintwork as and when
required for the approval of the Engineer.
16.1.9 Colours and Tints
At the appropriate time provide the Engineer with a full schedule of surfaces to
be painted and request details of paint colours required. All colours should be
to the approval of the Engineer.
16.1.10 Waste Disposal
Provide suitable movable receptacles into which all liquids, slop washings, etc.
are to be placed. On no account is such waste to be disposed of in sanitary
fittings. All solid refuse or inflammable residue shall be removed from the site.
16.1.11 Storage
Provide a suitable store for painting materials in a location approved by the
Engineer.
16.1.12 Materials
All materials shall be obtained from a manufacturer approved by the Engineer
and shall be suitable for the exposure and location.
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All paint, etc. shall be delivered in sealed containers bearing the following
information as applicable:
i. Manufacturer’s name, initials or recognised trademark.
ii. The appropriate title and Specification
iii. Whether primer, undercoat or finishing coat
iv. Lead free, if required
v. Whether for internal or external use
vi. The colour reference from BS 4800 or as specified
vii. The method of application (i.e. brush, spray or roller)
The batch number and date of storage and use if highly inflammable or toxic
Detailed instructions for storage and use, if highly inflammable or toxic.
Containers of materials other than paints listed shall bear as much of the above
information as is appropriate.
Paint shall be stored in sealed containers in a suitable lock-up store where it is
not exposed to extreme temperature sunlight or weather. Any special storage
conditions recommended by the manufacturer shall be observed.
No paint shall be used beyond a period of 18 months from the date of despatch
or date of certificate of re-test. If this period is exceeded, the paint shall be
removed from the site.
The priming coat, undercoats and finishing coat of paint in any one system
shall all be obtained from the same manufacturer.
Coats of a paint system shall differ in shade or colour where practicable.
16.1.13 Prevailing conditions
Exterior or exposed painting shall not be carried out under adverse weather
conditions, such as rain, extreme humidity, dust storms etc. or upon surfaces,
not thoroughly dry.
16.1.14 Preparation before proceeding
No painting or other thin coat work shall proceed until floors have been washed
over, and every possible precaution taken to keep down dust.
16.2 Materials
16.2.1 Paints, stains and other thin coatings
16.2.1.1 General
All such thin coating materials are to be proprietary products manufactured and
supplied by one reputable company specialising in such items.
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Consideration may, at the discretion of the Engineer, be given to more than one
company providing such products, however not in the case of thin coating
products which relate to each other e.g. Primer/ under-coat/ topcoat.
The paint system shall be used; subject to the Engineer’s approval.
16.2.1.2 Intumescent Coatings
Intumescent paint coating to structural steel to one minimum 1 HR fire
protection paint to be applied on base coat and primer on prepared surface
strictly in accordance with manufacturer’s written instructions.
Colour : Blue : Grey to approved sample.
The finished paint system shall be certified and approved by R.O.P.
16.2.1.3 Wood and Stain Finishes
To be with 2-pack clear polyurethane top coat to approved sample.
16.2.2 Paint System
16.2.2.1 Exterior Masonry Walls
Paint system comprising:
2-pack epoxy primer/sealer applied by brush at 60 µm applied to clean and just
free surface.
Acrylic rolling compound applied at 100µm with special roller to approved
textured finish.
2-pack polyurethane top coat applied at 50µm by brush or roller.
Colour: To engineer's approved.
16.2.2.2 External Steel Work
Etch Primer; 2-pack Polyvinyl Butyral to BS 5493.
Applied to D.F.T. of 8µm in accordance with manufacturer’s instructions.
High-build epoxy polyamide coating applied to D.F.T. of 125µm or ocean dry
and degreased primed surface.
2-pack acrylic polyurethane top coat applied to D.F.T. of 50µm
Colour: as directed.
16.2.2.3 Internal Walls
One coat of acrylic primer
Two coats of stucco putty and
Two coats of acrylic emulsion paint.
Colour as per engineer's approval.
16.2.2.4 Internal Ceilings
Internal ceilings, soffits and areas requiring matt finish shall be:
One coat of acrylic primer
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Two coats of stucco putty and
Two coats of acrylic emulsion paint.
Colour as per engineer's approval
16.3 Execution
16.3.1 Preliminary Checks
Ensure that the following conditions exist:
a) Timing and sequence agreed with others
b) Work by others (that could affect decorations) completed
c) Areas of internal work
d) Weather tight and maintained at temperature and humidity levels similar to
those prevailing after the works are occupied.
e) Provision of good lighting
f) Provision for clean conditions when the decorating works is in progress.
16.3.2 Ordering Materials
Obtain liquid materials in containers sized to suit the extent of the work and to
prevent the deterioration of residual quantities in opened containers. (Maximum
generally 5 litres) Order early for non-standard colours and any other non-
standard materials.
16.3.3 Order for Working
Work in sequence that ensures that finished work is not spoiled by dust and
debris arising from subsequent preparatory work.
16.3.4 Access
Provide step-ladders and towers etc. Do not stand on finished work and fittings
etc. Do not lean ladders against finished surfaces.
16.3.5 Before Commencing
a) Remove architectural ironmongery, luminaries and any other removable
fitments, etc. that could be contaminated by the painting work or which
obstruct areas to be painted or receiving wall linings. Do not re-fix until paint
is fully hardened. Liaise with fitters before moving M&E equipment and
interior design items.
b) Protect surfaces not intended to be coated.
c) Protect other finishes, particularly those of an absorbent nature (i.e. carpet).
d) Ensure lighting levels are adequate.
e) Check moisture content of backgrounds.
f) Arrange for the safe disposal of washings and waste materials etc. off the site
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(disposal into drains is forbidden).
16.3.6 Handling and Storage
Materials shall be stored in approved locations where they will not interfere
with the work of others. Oil rags, waste and similar combustibles shall be
removed from the building every night. Under no circumstances shall such
combustibles be allowed to accumulate and every precaution shall be taken to
eliminate conditions conducive to spontaneous combustion.
Observe fire safety precautions and provide suitable extinguishers adjacent to
storage areas.
16.3.7 Tests
From time to time, at the Engineer’s direction, samples for testing shall be
taken from the sealed containers, spray gun containers or from the workmen’s
kettles on the works and tested in accordance with BS 3900. In addition the
Engineer may require that unopened sealed containers be set aside for
subsequent tests.
Where such tests show that, though the material taken from open containers is
in accordance with the Specification the material in spray gun container or in
work-men’s kettles is unsatisfactory, any work coated with such
unsatisfactory materials shall be re-executed.
Likewise, any work on which the paint is found to be unduly thin shall be
prepared again and repainted, all to the satisfaction of the Engineer.
If any paint delivered is considered defective or unsatisfactory it shall be set
aside and the manufacturers and the Engineer notified immediately.
16.3.8 Preparation of Surfaces
16.3.8.1 Generally
Generally all surfaces shall be thoroughly prepared and shall be clean, free
from loose and powdery material and sufficiently dry for the subsequent
decoration treatment. Each coat of paint shall be thoroughly dry before the
next coat is applied.
16.3.8.2 Cement rendering on concrete and blocks
Surfaces shall be brushed down thoroughly to remove all dust and loose
material. Mortar droppings and nibs shall be removed and defects made good.
Efflorescence shall be brushed off as it appears and all decoration deferred until
it ceases.
The application of paints shall be delayed until sufficient drying to the
satisfaction of the Engineer has taken place.
16.3.8.3 Plaster
Surfaces shall be brushed down to remove loose material and dust and where
directed washed with a minimum of warm water and detergent and allowed to
dry.
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Minor defects, cracks and holes, after cutting out as necessary, shall be made
good as appropriate and rubbed down flush with the surrounding surface.
Efflorescence shall be brushed off as it appears and all decoration differed until
it ceases.
16.3.8.4 Softwood and hardwood
All surfaces shall be rubbed down smooth with fine abrasive, and dusted off.
Sound knots, resinous streaks and bluish sapwood shall be given two coats of
knotting which shall extend at least 25mm around the affected area. Nails
shall be punched well below the surfaces.
After priming, defects such as open joints or nail holes shall be stopped with
hard stopping and surface imperfections faced up all as necessary. All such
repairs shall be primed before undercoating is applied.
Timber to be given translucent finish : shall be finished smooth and even with
sharp arises taken off. Surfaces shall be dusted and any excess of natural oil
shall be wiped down with white spirit immediately before applying finish.
Stop all nail holes and similar depressions with stopping to match the colour of
the timber, pressed well in to remove trapped air. Finish off flush with surface.
After stopping, fill pore and grain irregularities with filler to match the colour
of the timber, remove surplus and run down to leave a smooth and even
appearance.
Gaboon plywood and similar open-grained surfaces shall be face-filled over the
whole surface after priming and rubbed down smooth and dusted off.
The moisture content of the wood shall be tested prior to paintwork and shall
comply with the requirements of timber work specification but shall never
exceed interior 12%, exterior 17%.
Hardwood for paint finish which contains an excess of natural oil shall be
degreased with white spirit immediately prior to priming and allowed to dry.
16.3.8.5 Architectural iron and steelwork
Bare iron and steelwork including sheeting and pipes shall be thoroughly
prepared by removing all dirt, rust and loose mill-scale to the satisfaction of
the Engineer.
Preparation shall include the use of chipping hammers, scrapers, mechanical
wire brushes and carborundum grinding discs. The use of mechanical chisels
and other impact tools may exceptionally be ordered if in the option of the
Engineer their use is necessary.
All rivets, welds, angles, joints and openings shall be properly cleaned.
All tools shall be operated in such a manner that no sharp ridges or burrs are
left and no cuts made in the steel.
Dust and other loose material shall be removed after cleaning. Oil and grease
shall be removed with white spirit.
The priming coat shall be applied before any contamination or rusting occurs.
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In positions inaccessible to manual cleaning and where steel scraping is
insufficient, chemical rust remover shall be used, applied liberally. All surfaces
treated with rust remover and surrounding areas which might have become
contaminated are to be thoroughly washed with fresh water. Priming shall be
carried out as soon as practical and in any case the same day.
Steelwork primed before delivery and damaged in transit shall have all
damaged areas cleaned and patch primed immediately upon delivery. Areas
damaged during erection shall be similarly dealt with.
Steelwork which is supplied with the final finish applied shall be made good as
necessary strictly in accordance with the manufacturer’s recommendations and
to the approval of the Engineer.
16.3.8.6 Fibre building board, insulating and wallboard, hardwood,
plasterboard and wood wool
All boards, slabs and sheets shall be dry and the surfaces well brushed down to
remove loose material, dirt and dust. Cut edges require special priming.
16.3.9 Preparation of the Paint
All liquid paint shall be thoroughly stirred to a uniform consistency when
containers are opened and before being transferred to paint kettles.
Thinning for oil paints shall be permitted only exceptionally by agreement with
the Engineer.
For special paints the thinner and quantities recommended by the manufacturer
shall be used.
The paint and the like shall be kept well stirred and shall not be used when a
thick sediment has settled.
Any paint or the like which develops a skin on the contents within the contract
period shall be removed from the works.
Any residue left in a tin shall not under any circumstances be added to the
contents of another tin.
The mixing of different paints together shall not be permitted.
16.3.10 Straining
Any paint showing bittiness in application shall be strained through fine gauze.
16.3.11 Method of Application
The manufacturer’s instructions shall apply together with following guidelines.
16.3.11.1 General
All brushes paint rollers, spraying equipment, kettles, etc., used in carrying out
the work shall be clean and shall be thoroughly re-cleaned before being used
for a different type of class of material.
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16.3.11.2 Brush painting
Paint shall be applied so that the finished surface is free from brush marks.
Cutting in shall be neatly and accurately performed. All areas or parts shall be
laid off correctly. Before any new coat is applied over a preceding one, and
any dropping, runs or irregularities shall be removed and the Engineer shall be
invited to check. A fresh coat may be applied only when the previous one is
completely dry. Each coat, except the last, must be lightly rubbed down with
fine glass paper before the next is applied. The minimum thickness of coats
when dry shall be 20 to 140 microns. The final colour is to be perfectly even.
16.3.11.3 Spray painting
Spray painting will be permitted with approved machines but only in the
applications approved by the Engineer. Surfaces adjoining those being sprayed
shall be carefully and closely masked.
The coating shall be even and adequate and finish shall be free from orange
peel appearance, runs, sags, curtaining and other defects.
16.3.11.4 Roller painting
Roller painting shall be permitted with mohair or short pile sheepskin rollers
but in no case shall it be allowed in application of the following:
i. External work
ii. Priming coats
iii. Work other than that of a straight forward plain character.
Priming coats shall be applied by brush to give a coat of adequate thickness
with no misses and to satisfy the porosity of the surface. The priming shall be
well worked into the surface joints and angles.
Priming coats applied off site that have suffered from exposure on the site or in
transit shall be touched up or re-primed as necessary before undercoating.
The work shall be effected only on absolutely dry surfaces in ventilated
premises on surfaces free from dirt, dust, grease, strains, etc. Before and during
its use, the paint must be kept fully homogenized by stirring and, if necessary,
filtering. Painting of exterior work shall not be allowed in damp weather or
during rain, or when dew is falling or likely to fall within a few hours.
Protect all areas whilst working from paint splashes, drips etc. This may entail
covering certain semi-finished areas by tarpaulins, plastic sheets and such like.
16.3.12 Stains and Clear Preservative
Stains and clear preservatives are to be applied strictly in accordance with
manufacturer's recommendations.
16.3.13 Priming joinery
One coat of priming paint shall be applied before delivery to all surfaces of
joinery after drying out as described.
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Priming coats shall be applied to treated softwood having a moisture content
not exceeding 17 percent in accordance with the Specification.
Inspection:
Undertake a thorough visual inspection with the Engineer of the completed
decorations. The general quality will be judged as follows:
a) Satisfactory stopping and filling
b) Uniformity of gloss, sheen or texture
c) Uniformity of colour and obscuration of substrate
d) Freedom from film defects such as runs, sags, wrinkling, bulking or
thinning at edges, entrained dust, dirt or paint.
e) Accuracy of cutting in
f) General cleanliness and an overall appearance of the work.
16.3.14 Completion
Carry out remedial work resulting from the inspections to the satisfaction of the
Engineer and maintain the finishes in unblemished condition until handover.
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17 Carpeting
17.1 General
17.1.1 Scope of work
Supply and installation of carpeting where shown on the drawings or as
indicated in the finishes schedule.
Carpet shall be laid on approved rubber underlay and secured at edges with
gripper rods. Carpet shall be re tensioned after initial bedding-in period.
Carpet tiles for offices shall be as manufactured by B.S.B; Heuga; Tretford or
equal approved. To approved colour and sample.
17.1.2 Relevant British Standards
Conform to the requirements of the following British Standards where applicable:
BS 1006 Methods of test for colour fastness of textiles
BS 4223 Methods for determination of constructional details of textile floor coverings with yarn pile
BS 4682 Methods of test for dimensional stability of textile floor coverings.
BS 5229 Method of determination of tuft withdrawal force for carpets.
BS 5325 Code of Practice for the installation of textile floor coverings.
BS 5808 Specifications for underlays for textile floor coverings.
17.1.3 Literature and samples
Provide comprehensive technical literature on proposed materials with illustrations
of all colours, patterns and textures available. Provide samples of proposed
products.
Selection of product type, colour, pattern and texture is to be to the approval of the
Engineer.
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Full literature is required stating as minimum:
• Pile fibre weight and height
• Pile construction
• Yarn weight and specification
• Manufacturing process
• Primary and secondary backing
17.1.4 Record samples
Before any carpet laying commences provide two samples each approximately
500mm square cut from each type of specified carpet. Attach a label to each
sample stating the brand name and ordering reference. Seal the cut edges if
necessary.
17.1.5 Guarantee
All carpeting is to be guaranteed for a period of at least 10 years from date of
project handover against excessive surface wear, edge ravel, backing
separation, shrinking, stretching and static electricity.
“Excessive surface wear” means loss of more than 15% by weight of face fibre.
17.2 Materials
17.2.1 Carpet Tiles
Proprietary heavy duty commercial quality carpet made from carded fibres
formed into a continuous corrugation and bonded with PVC to a hessian
backing.
• Pile composition of carpet : 80% animal hair, 20% synthetics.
• Anti-static level must be below 2.5 KV
• Carpet to be inherently stain resistant. Flammability tests must comply with
BS 4790/6307.
17.2.2 Carpet Accessories and fixing materials
This includes edge binding tape, joining materials, grippers, etc.
All such items are to be as recommended by the carpet manufacturer, and as
approved by the Engineer.
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17.2.3 Edging strip
Solid polished brass proprietary strip approximately 5x25mm.
Changes in the types of flooring shall occur under the centre of the door
separating the two spaces.
The brass bar shall be set flush with the hardflooring.
17.2.4 Adhesives
As recommended by the floor finish manufacturer of a type that allows the
floor covering to be securely installed and easily stripped. The carpet shall not
be glued to the floor.
Underlay
Rubber underlay cushions or as recommended and guaranteed by the
manufacturer.
17.3 Execution
17.3.1 Execution Generally
Comply with BS 5325 Installation of textile floor coverings and subject to
any qualifications given below. Where necessary, check the dryness of the base
in accordance with the appendix to the CP.
17.3.2 Preliminary checks
Ensure that working conditions and background are suitable . Bases shall be
clean and dust-free, smooth, level and dry. Ensure there is sufficient material
from the same production run for each specified type to guarantee uniform
appearance when laid.
17.3.3 Planning and general layout
Wherever possible and appropriate, lay carpet with consideration to the
following general requirements; and when in conflict, agree the procedures
with the Engineer:
a) Seams to run the length of the area.
b) Traffic routes along rather than across seams
c) Light from windows not falling across seams
d) Pile laying away from lighting
e) Seams lining up in direction of manufacture.
f) Avoidance of cross-seams
g) Patterning matched.
h) Underlay seams at 90 degree angle to carpet seams
Lay out flooring material before cutting to layout approved by the Engineer,
allowing for ready access to floor trunking or the like.
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Lay out material to minimise cutting and avoid unduly narrow or small cut-offs.
17.3.4 Working with Adhesives
Comply with the following when laying carpets on adhesive:
a) Clean the base and prime if necessary : allow primer to dry thoroughly.
b) Ensure there is adequate ventilation. Do not smoke (tobacco smoke and
some adhesive fumes combine to form poisonous gases).
c) Spread adhesive to an even coverage without trowel ridges.
d) Remove any spilt adhesive with solvent immediately.
17.3.5 Installation generally
Installation to be carried out in strict conformance with the manufacturers written
instructions.
17.3.6 Completion
Leave floor finish clean and adequately protect the completed installations from
any contamination or traffic that could harm the flooring till handover.
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18 Stone Cladding
18.1 General
18.1.1 Scope of Work
Supply and installation of natural sand-stone cladding to walls where indicated
on the drawings.
18.1.2 Submittals
Submit comprehensive technical literature detailing the proposed cladding
fixing system for the approval of the Engineer.
Submit samples of various suitable sandstones for the Engineer’s approval.
Submit shop drawings of all facades where stone cladding is required
indicating all joints in the cladding and all fixing points; suspension rails; all
movement joints, and any other related element pertinent to the design of
the installation.
18.1.3 Standards
Generally comply with the recommendations of BS 8298:1989 – Design and
installation of natural stone cladding and lining.
18.2 Materials
18.2.1 Sand Stone Cladding
Slabs to be approximately 300x600x20mm thick and to the sizes indicated on
the drawings.
Edges to be square, chamfered or rebated according to location, as indicated
on the Drawings.
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18.2.2 Fixing System
Proprietary stainless steel stone cladding support system type “4102-4104
Support Anchor RAP” by “FRIMEDA FIXING SYSTEMS GMBH” or
equal and approved manufacturer.
The system is to comprise dowelled support and restraint brackets secured
to the supporting structure by a channel arrangement either cast in (to new
concrete walls) or surface fixed (to existing concrete walls and new steel-
framed walls).
Special supports required for soffits, corners, sloping surfaces, copings, etc.
are to be as recommended by manufacturer of fixing system.
Provide calculations appropriate to the type of sandstone and the proposed
anchor system in accordance with the anchor manufacturer’s
recommendations for the Engineer’s approval.
Fix anchors to solid blockwork or reinforced concrte only.
18.2.3 Joint Filler and Sealant
Joint filler to be polyethylene strip as specified in “Joints, Sealants and
Joint Covers” Section.
Sealant to be either 1 part polyurethane; 2 part poly-sulphide to BS 4254;
or 2 part polyurethane (non sag type).
18.3 Execution
18.3.1 Fixing System
Install support channels by an appropriate approved method in accordance
with the approved shop drawings, and the recommendations of the
manufacturer.
18.3.2 Stone
Install support and restraint clamps and stone slabs ensuring proper
vertical and horizontal alignment, all in accordance with the manufacturer’s
instructions.
Comply generally with the installation recommendations of BS 8298:1989
Joints, except for compression and movement joints, to be 5mm wide.
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External corner joints to be mitred and birds mouthed unless otherwise noted
on the Drawings.
18.3.3 Compression and Movement Joints
Incorporate compression and movement joints in accordance with the
recommendations of BS 8298:1989. Generally locate 15mm horizontal
compression joints at every floor level; and 10mm wide vertical movement
joints at maximum 6m centres.
18.3.4 Joint Filling
Except for compression and movement joints fill with pigmented
sand:cement mortar, taking care not to discolour the stone face. Joints to
be flush.
For compression and movement joints use joint backing and sealant as
specified herein. Finished sealant joint to be slightly dished.
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19 Metal Cladding
19.1 General
19.1.1 Scope of Work
Supply and installation of single skin aluminium ventilated cladding for external
walls as shown on the drawings.
19.1.2 Submittals
Provide comprehensive technical literature fully detailing the proposed
product and related details for the Engineer’s approval.
Provide comprehensive shop drawings fully detailing the proposed
installations for the approval of the Engineer.
19.1.3 Personnel
Ensure that only personnel skilled in the installation of this kind of work are
employed.
19.2 Material
19.2.1 Aluminium Cladding
Proprietary single skin aluminium cassette Rainscreen Cladding, Luxalon® from
Hunter Douglas Luxalon® or equal approved comprising of smooth aluminium
alloy 3005/ steel / stainless steel / zinc / copper of 2mm thk. installed on primary
support structure fixed horizontally
The panels to be of width 600 to 800mm module in variable lengths up to 2500
mm. as mentioned on the drawings and to align with the cill and lintel levels of
openings.
Colour of cladding to be RAL 9016 in PVF2/Luxacote or equivalent finish.
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19.2.2 Fixing Devices
The panels will be fixed to and supported by the Hunter Douglas Construction
Elements proprietary aluminium support carrier system and adjustable
connectors as necessary.
Appropriate fastener having regard for the pull-out / cantilever effect the clamp will
have on the fastener and its relationship to the wind load criteria.
19.3 Execution
19.3.1 Installation
Prepare shop dwgs. of the cladding taking into consideration window cill and
lintel levels, for the Architect’s approval. Installation of the aluminium
cladding to be in full compliance with the manufacturer's instructions.
END OF SECTION
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20 Joints, Sealants and Joint Covers
20.1 General
20.1.1 Scope of Work
Supply and installation of sealants and joint covers as called for on the
Drawings and in the Specification.
20.1.2 Relevant British Standards
Conform to the recommendations of the following British Standards where
applicable:
BS 4254 Specification for two part polysulphide based sealants
BS 5212 Cold applied joint sealants system for concrete pavements
BS 5215 One part gun grade polysulphide based sealants.
BS 5889 Silicone based building sealants
BS 6213 Guide to selection of constructional sealants.
20.1.3 Literature
Provide a complete schedule of sealants proposed for use on the job, listing type;
manufacturer; composition; colour; primer; joint width/depth ratio; backing
material; for each application.
Submit comprehensive literature describing the proposed sealants for the
approval of the Engineer.
Submit comprehensive literature detailing the proposed joint covers including
installation detail and samples for the Engineer’s approval.
20.2 Materials
20.2.1 Sealants
All sealants should be proprietary products, recommended by the manufacturer
for the intended purpose.
a) one part polysulphide to BS 5215
b) flexible epoxide
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c) two part polysulphide to BS 4254
d) two part polyurethane
e) mastic strip
f) acrylic resin (solvent type)
g) one part elastomeric to BS 5215
Other product types may only be used after approval by the Engineer.
20.2.2 Joint filler
Joint filler shall be closed-cell non-absorbent low density durable sheet,
rectangular strip or circular strip as required. Fibre board joint filler where
shown on the Drawings shall be compressed sheet of high grade bitumen
impregnated fibres compounded into compressible non-extruded board. The
pressure required to compress the material 50% of the original thickness shall
be approx. 3.1N/mm2, following which recovery shall be not less than 77%.
20.2.3 Backing Strip
If so recommended for use by the sealant manufacturer, backing strips shall be
proprietary closed cell expanded polyethylene strip of a diameter applicable to
the width of the joint being filled.
20.2.4 Primer
Primer, if required, to be as recommended by sealant manufacturer.
20.2.5 Expansion Joints
Expansion joints in wall and floor finishes shall be provided in the locations
indicated on the Drawings for joint widths as noted and total movement as
specified.
20.2.6 Joint Covers
Proprietary extruded bronze expansion joint cover suitable for 20mm wide joint
with movement allowance of 10mm.
Colour of rubber insert to suit internal finish.
Colour of rubber insert to suit internal finish.
20.3 Execution
20.3.1 Installation Generally
Installation of joint filler or backing strip and sealant to be carried out in strict
compliance with the sealant manufacturer’s instructions.
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20.3.2 Preparation
Thoroughly clean the surface to which sealant is intended to adhere. Prime
surfaces in accordance with sealant manufacturer’s written instructions if so
recommended.
Mask adjacent surfaces to ensure straight and even edges.
20.3.3 Tolerances
Width of proprietary joints shall not vary by more than ± 2mm from the
nominal width.
Width of formed joints shall not vary by more than 5% over the full length of
the joint.
20.3.4 Application of various sealant types
a) Floors/traffic areas:
2 part polysulphide
or 2 part polyurethane
or flexible epoxide
b) Parapet flashing and other similar roof locations : acrylic resin
(solvent type)
c) Joints of windows and doors with structure : 1 part polysulphide
d) Ceramic wall tiling : 1 part polysulphide
e) Joints of sanitary ware with ceramic tiling : flexible epoxide
f) Movement joints in block work : 2 part polysulphide
g) Concrete pavement joints : 2 part elastomeric
All sealants to be either hand or gun applied in accordance with manufacturer’s
instructions.
20.3.5 Joint Covers
Install all joint covers in accordance with the manufacturer’s instructions
ensuring a neat finished joint with all adjacent floor/wall finishes.
20.3.6 Completion
Completed sealant joint to be tooled if necessary to obtain a neat regular finish
either flush or slightly dished to the abutting surfaces.
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21 Sanitary Ware
21.1 General
21.1.1 Scope of Work
Supply and installation of sanitary ware appliances, all fittings and fixtures as
specified in the drawings, schedules and specification.
21.1.2 Relevant Standards
BS 6465 : Sanitary installations
BS 6465 : 1984 Code of Practice for scale of provision, selection and
installation of sanitary appliances.
BS 8000 Workmanship on building sites.
21.1.3 Literature and Samples
Provide comprehensive technical literature on all sanitary appliances together
with illustration of colours, shapes etc.
21.1.4 Samples
Provide samples of each type of fitting.
Selection of all materials shall be to the approval of the Engineer.
21.2 Materials
Sanitary ware shall be vitreous china; complete with all accessories.
Colour : to be white unless specified otherwise.
21.3 Fixing
Securely fix all appliances, following the manufacturer’s site work instructions
and the following:
Where they are subjected to frequent wet conditions use copper alloy or
stainless steel fixings and fastenings, unless the appliance manufacturer has
supplied fixings and fastenings or has provided instructions about which fixings
and fastenings are satisfactory.
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Do not embed any appliance in the wall surface finish except where specified.
Do not use supply or discharge pipe work to support or fix appliances.
Where the appliance is seated with its weight carried directly on the floor,
ensure that the seating is level and even; if necessary on hard floors, where it is
intended that an appliance makes continuous contact with the floor, use mortar
(cement: sand 1:6) no thicker than 20mm as laid on hard setting mastic to point
around and under the appliance.
Ensure that appliances are fixed at the required position and height and are
fixed plumb and level so that surfaces designed with falls and drain as intended.
21.4 Sealant
Seal between all appliances except, normally, cisterns, and the building
structure as follows:
a) Ensure that the correct specified type of sealant is used.
b) Ensure that the finishes to backgrounds are complete and the surfaces to
receive the sealant are clean and dry.
c) Remove the minimum necessary of any protective covering to give access
for the application of the sealant.
d) Apply sealant in accordance with the manufacturer’s site work instructions
and leave a neat smooth surface and watertight joint.
21.5 Protection
a) Keep protective coatings in place as long as practically possible up to hand-
over.
b) Replace any appliance which are chipped, cracked, scratched, distorted or
otherwise damaged.
c) Do not stand in or on any appliance
d) Do not use appliances.
21.6 Inspection and Testing
Examine sanitary appliance for damage and satisfactory operation of appliances
and fittings prior to inspection for handover, remedy any faults observed.
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22 Wall Guard Systems
22.1 General
22.1.1 Scope of work
Wall Guard system for wall protection and decoration
22.1.2 Standards
A. American Society for Testing and Materials (ASTM)
B. National Building Code of Canada (NBC)
C. National Fire Protection Association (NFPA)
D. Society of Automotive Engineers (SAE)
E. Underwriters Laboratory (UL)
F. Underwriters Laboratory of Canada (ULC)
G. Uniform Building Code (UBC)
22.2 System Description
Performance Requirements: Provide wall guard systems that conform to the
following requirements of regulatory agencies.
• Fire Performance Characteristics: Provide UL Classified wall guards
conforming with NFPA Class A fire rating. Surface burning
characteristics, as determined by UL-723 (ASTM E-84), shall be flame
spread of 10 and smoke development of 350 - 450. Provide ULC
(Canada) listed wall guards conforming to the requirements of the
National Building Code of Canada 1990, Subsection 3.1.13. Surface
burning characteristics, as determined by CAN/ULC-S102.2, shall be
flame spread of 15 and smoke developed of 35.
• Self Extinguishing: Provide wall guards with a CC1 classification, as
tested in accordance with the procedures specified in ASTM D-635-74,
Standard Test Method for Rate of Burning and/or Extent and Time of
Burning of Self-Supporting Plastics in a Horizontal Position, as
referenced in UBC 52-4-1988.
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• Impact Strength: Provide rigid vinyl profile materials that have an
Impact Strength of 30.2 ft-lbs/inch of thickness as tested in accordance
with the procedures specified in ASTM D-256-90b, Impact Resistance
of Plastics.
• Chemical and Stain Resistance: Provide wall guards that show
resistance to stain when tested in accordance with applicable provisions
of ASTM D-543.
• Fungal and Bacterial Resistance: Provide rigid vinyl that does not
support fungal or bacterial growth as tested in accordance with ASTM
G-21 and ASTM G-22.
• Color Consistency: Provide components matched in accordance with
SAE J-1545 - (Delta E) with a color difference no greater than 1.0 units
using CIE Lab, CIE CMC, CIE LCh, Hunter Lab or similar color space
scale systems.
22.3 Submittals
• Product Data: Manufacturer’s printed product data for each type of wall
guard specified.
• Detail Drawings: Mounting details with the appropriate fasteners for
specific project substrates.
• Samples: Verification samples of wall guard, 8" (203mm) long, in full
size profiles of each type and color indicated.
• Manufacturer’s Installation Instruction: Printed installation instructions
for each wall guard.
22.3.1 Delivery, Storage And Handling
• Deliver materials in unopened factory packaging to the jobsite
• Inspect materials at delivery to assure that specified products have been
received.
• Store in original packaging in a climate controlled location away from
direct sunlight.
22.3.2 Project Conditions
A. Environmental Requirements: Products must be installed in an interior
climate controlled environment.
22.4 Manufacturer
Provide all wall Guards and wall protection from a single source.
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22.4.1 Manufactured Units
22.4.1.1 Wall Guard Profile
• Wall Guard, 4" (152mm) height x 1" (25mm) depth
22.4.1.2 Materials
• Vinyl: Snap on cover of .080" (2mm) thickness shall be extruded from
chemical and stain resistant polyvinyl chloride with the addition of
impact modifiers. No plasticizers shall be added (plasticizers may aid in
bacterial growth).
• Aluminum: Continuous aluminum retainer of .080" (2mm) thickness
shall be fabricated from 6063-T5 aluminum, with a mill finish.
22.4.1.3 Components
• End caps, inside corners, outside corners and brackets shall be made of
injection moulded thermoplastics.
• Fasteners: All mounting system accessories appropriate for substrates
indicated on the drawings shall be provided.
22.4.1.4 Finishes
• Vinyl Covers: Colours of the wall guard to be selected by the architect.
Surface shall have a pebblette texture.
• Moulded Components: End caps, inside corners, outside corners and
brackets shall be of a colour matching the wall guards. Surface shall
have a pebblette texture.
22.5 Execution
22.5.1 Examination
• Examine areas and conditions in which the wall guard systems will be
installed.
• Complete all finishing operations, including painting, before beginning
installation of wall guard system materials.
• Wall surface shall be dry and free from dirt, grease and loose paint.
22.5.2 Preparation
• General: Prior to installation, clean substrate to remove dust, debris and
loose particles.
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22.5.3 Installation
Locate wall guard as indicated on the approved detail drawing for the
appropriate substrate, and in compliance with the IPC installation instructions.
Install wall guard level and plumb at the height indicated on the drawings.
Installation of Wall Guards:
• Cut the aluminum retainer to the desired length, allowing 37mm for
each end cap, 38mm for each inside corners and 14mm for each outside
corner.
• Using a 1/4" drill bit, drill holes in the centerline of the aluminum
retainer 102mm from each end and spaced evenly over the entire length
(6 anchors per 3.66m length).
• Position and level the aluminum retainer on the wall, allowing for end
caps and corners, and transfer mounting holes to the wall with a
marker. Drill 1/4" (6mm) holes at each mark and position
ALLIGATOR anchors into the holes on the wall. Mount the retainer
with #10 x 1-3/4" phillips pan head screws and tighten the screws to
secure the retainer.
• Slide the end caps and corners onto the aluminum, leaving a 1/16" gap
for adjustments, and secure with one 1-1/4" self-tapping screw per end
cap or two per corner.
• Cut the vinyl cover to the distance between the end caps/corners.
NOTE: Trim all factory edges square before installation. Position the
vinyl cover on the aluminum retainer starting at one end and working
to the other end by pushing the cover over the aluminum until it snaps
into place.
22.5.4 Cleaning
At completion of the installation, clean surfaces in accordance with the
manufacturers clean-up and maintenance instructions.
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23 External Work – Ground Finishes
23.1 Scope
This Specification covers the requirements for materials and workmanship for
the installation of kerbs and paved surfaces.
23.2 General
23.2.1 Related British Standards and Other References
BS 435:1975
(1993)
Specification for dressed natural stone Kerbs, channels,
quadrants and setts.
BS 3921:1985 Specification for clay bricks.
BS 5931:1980 Code of Practice for machine laid in-situ edge details for
paved areas.
BS 6677 Clay and calcium silicate pavers for flexible pavements.
Part 1:1986 Specification for pavers
Part 2:1986 Code of Practice for design of lightly
trafficked pavements
Part 3:1986 Method of construction of pavers
BS 6717 Pre cast concrete paving blocks
Part 1:1986 Specification for pavers
Part 2:1986 Code of Practice for design of lightly
trafficked pavements
Part 3:1986 Method of construction of pavers
Part 1:1993 Specification for pavers
Part 3:1989 Code of Practice for laying.
BS 7263 Pre-cast concrete flags, kerbs, channels, edgings and
quadrants
Part 1:1990 Specification
Part 2:1990 Code of Practice for laying.
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BS 7533:1992 Guide for structural design of pavements constructed with
clay or concrete block pavers
BS 882 : 1983 Dry sharp sand
23.2.2 Definitions
For the purposes of this Specification the definitions given in the British
Standards listed in Appendix ‘A’, as appropriate shall apply.
23.2.3 Levels, Reference Points and Setting-Out
The Works are to be set out from primary datum levels and setting out points
indicated on the drawings or as directed by the Engineer on site.
The Contractor shall submit his proposals for setting out and controlling the
alignment of the Works to the Engineer and obtain his approval prior to the
start of construction. The Contractor shall supply to the Engineer details of the
value and location of all temporary benchmarks and reference points he
establishes.
Should the Contractor dispute the original ground levels shown on the
drawings, he shall agree these with the Engineer prior to disturbing the original
ground.
23.2.4 Related Works
The Contractor shall carefully examine all of the Contract Documents for
requirements which affect the works covered by this Section.
Where materials used in this Section have been Specified elsewhere, the
relevant clauses shall apply to this Section.
Materials that have not been individually Specified shall be of first quality and
the minimum standard acceptable shall be that of the relevant British Standard
where applicable.
23.2.5 Quality Assurance
23.2.5.1Source
Granites, marbles and natural stones shall be provided from a single source and
through a single supplier.
Stone materials shall comply with the standards of the National Granite
Quarries Association.
23.2.5.2Mock-ups
Before commencing the primary works covered by this section, the Contractor
shall provide mock-ups of the representative installation for approval of the
Client and the Engineer.
Approved mock-ups shall be protected through the course of the Works and
shall be used as a basis for the acceptance of the completed works.
Acceptable mock-ups may be incorporated as part of the finished works.
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23.2.6 Submittals
23.2.6.1 Product Data
The Contractor shall submit manufacturer’s product data, installation
instructions, use limitations and other recommendations.
Certificates of Compliance shall be provided from each manufacturer.
23.2.6.2 Verification Samples
The Contractor shall submit representative samples of each element that is to be
incorporated into the finished Works. Samples shall show the full range of
colour and finish variations that may be expected. At least 4 No. un-mounted
units are to be provided.
23.2.6.3 Shop Drawings
The Contractor is to provide for Engineer’s approval, large-scale shop drawings
for the fabrication of all stonework. The drawings shall include plans and
details of the exact size, shape, profile, curvature, joinery, finish and proposed
fixing methods.
23.2.7 Delivery, Storage and Handling
Deliver, store and handle stone units in strict compliance with manufacturer’s
instructions and recommendations.
Materials shall be stored above ground and protected from damage and soiling.
23.2.8 Project Conditions
23.2.8.1 Weather
Work shall be executed only when the existing and forecasted weather
conditions are within the limits established by International Masonry All-
Weather Council – Guide Specification, and the mortar admixture
manufacturer.
23.2.9 Substrates
Proceed with work only when substrate construction works are completed.
23.2.10 Extra material
The Contractor shall provide wrapped, packaged and labelled additional
material consisting of three (3No) pieces of each type, size and configuration of
stone used on the project, delivered to the location as directed by the Engineer.
23.3 Materials
23.3.1 General
Where materials used in this Section have been Specified elsewhere, the
relevant clauses shall apply to this Section.
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23.3.2 White Cement and Aggregate
White cement shall be obtained from an approved manufacturer and shall
comply with the relevant British Standard. (BS: 12).
White aggregate shall be of a colour approved by the Engineer and shall
comply in all respects with the requirements for concrete aggregates.
23.3.3 Pre-cast Concrete Kerbs
Pre-cast concrete kerbs, channels, edgings and quadrants shall comply with
BS7263:2001 Parts 1 to 3.
Components shall be hydraulically pressed, laid and bedded on a Class II
mortar bed of not less than 10mm and not more than 40mm on a foundation of
concrete Grade M20.
For radii of 12m or less, appropriate radius kerbs shall be used. Short, straight
sections of kerb shall not be used for these radii without the Engineer’s
approval.
Prior to backing with concrete, the kerb line shall be checked for line and level
and the foundation shall be thoroughly cleaned and wetted. Any units deviating
by more than 3mm in 3m from line and level shall be taken up and re-laid. The
level of any part of the kerb line shall not deviate by more than 3mm vertically
from the Specified level.
Where filling behind the kerbs is likely to have harmful effect; the kerb,
backing and foundation shall be protected by a method agreed with the
Consultant or as shown on the drawings.
Joints between pre-cast units are to be left open.
Expansion joints of 3 to 5mm width are to be placed at 6m centres in both
foundation and backing.
23.3.4 Granite Kerbs and Paving
Stone and granite shall be obtained from a reputable and approved supplier.
Sizes
Shall be provided as shown on the drawings and as Specified below:
Stone and granite within vehicular areas. 5 cm thick.
Stone and granite within pedestrian areas. 3 cm thick.
Stone and granite shown on the drawings to occur in radial patterns shall be
fabricated in a curved shape to conform to the radii shown on the drawings.
23.3.5 Mortar and Grout Materials for Stone & Granite Paving
23.3.5.1Dry areas
Portland Cement ASTM C-150 Portland
Cement
Type I or II Colour:
white
Hydrated Lime ASTM C-207 Type S
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Aggregates ASTM C-144
Joints less than 6mm Graded with 100% passing the No8 sieve and 95%
the No16 sieve.
Pointing mortar Graded with 100% passing the No16 sieve
23.3.5.2Coloured mortar and grout pigments
Shall be natural or synthetic oxides and chromium oxides, compounded for use
in mortars. Only pigments with a record of satisfactory performance in stone
mortars shall be used. Colour shall be selected from the full range of
manufacturer’s standard colours and shall be to the Engineer’s approval.
23.3.5.3 Water
Clean, non alkaline and potable. Water is not to be used in latex modified
grouts or mortar mixes.
23.3.5.4 Wet areas
Mortar materials
Contractor shall provide latex modified Portland cement thick bed mortar to
comply with the directions of the latex additive manufacturer and as necessary
to produce a stiff mixture with a moist surface at time of setting stones.
Thickset mortar latex additive Mortar Admix or equal and approved.
Adhesive coat Mortar Additive Filler Powder to
engineer's approval.
Bond coat: Latex Additive Filler Powder to
engineer's approval.
Thick-bed mortar reinforcing mesh SS type to Engineer’s approval
Grout materials
Provide latex modified Portland cement, factory blended to comply with the
directions of the latex additive manufacturer.
Grouting mortars Laticrete Dry Set Grout or equal and
approved
Dowels To be stainless steel type (SS) to
Engineer’s approval.
23.3.5.5Clay Pavers and Kerbs
Clay pavers shall conform to the following:
Square edged pavers 200x100x65mm
Ribbed chamfered pavers 200x100x65mm
Classification Type PB; BS 6677:1986 CL.4
Texture: Wire cut or drag faced
Compressive strength: Greater than 70N/mm2 BS
3921:1985:CL.7
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Transverse breaking load Greater than 7kN – BS
6677:1986:CL.6
Liability to efflorescence Nil – BS 3921:1985:CL.6
Tolerance In accordance with BS
677:1986:CL.5.2
Mean wet skidding resistance value Greater than 60 to BS
6677:1986:CL.7
Water absorption Less than 7% to BS 3921:1985:CL.8
Colours: Buff
Red
Brown
Bricks shall be as supplied by:
• Bricks shall be bedded on 50mm sharp sand on an approved sub-base or on
20mm mortar bed on 150mm thick concrete foundation. The Contractor
shall allow for providing samples of each brick type and for the
construction of 2.0m x 2.0m sample panels for approval of the Client and
Engineer.
• Pavers in vehicular area shall be laid on a bed of mortar complying with
Class (i) of BS 5628.
• Sand for mortars shall comply with the requirements of Grading M as
contained in Table 5 of BS 882.
• Joint filling shall be in similar mortar with the addition of a colouring agent
to the approval of the Engineer.
• Pavers shall be buttered with joint filler and placed onto the prepared bed
immediately after application of the cement slurry. Additional mortar shall
be carefully placed in the joints as required and the surplus removed, a joint
profile being formed with the appropriate tool.
• Pointing shall be keyed unless otherwise specified.
• Care shall be taken at al times to prevent the staining of pavers resulting
from excess mortar or slurry entering the surface texture of the block.
• Movement joints shall be provided to the Engineer’s approval.
23.4 Pre-cast Concrete Paving Blocks
23.4.1 Materials
PC concrete paving blocks shall conform to the following:
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Roads and parking
areas
200x100x80mm
Pedestrian walkways 200x100x60mm
Dimensions and
tolerances:
Length+ 2mm
Width+ 2mm
Thickness+ 3mm
Correction factors for
chamfers and thickness
Plain Chamfered
60/65 1.00 1.06
80 1.12 1.18
100 1.18 1.24
Arises Wearing surface not less than 70% of the plan area
Arises to be clean, plane and uniform in dimension
Cement To BS 12, 4027 or BS 146.
Cement content of compacted concrete not less than
400kg/m
Texture To approved sample
: Compressive strength Average of not less than 49N/mm2 in wet conditions
No individual block to be less than 40N/mm2
Aggregates In accordance with BS 882
Salt content limits Acid soluble chlorides:
0.06% by wt fine aggregate
0.02% by wt coarse aggregate
Acid soluble sulphates:
0.3% by wt of fine aggregate
0.3% by wt of coarse aggregate
Water in production Clean and free from deleterious matter
pH. value in basic range 7.9
:
Total dissolved solids 2000 mg/litre
Chlorides: 600 mg/litre
Sulphates 500 mg/litre
Alkali carbonates & bicarbonates 1000 mg/litre
Liability to
efflorescence
Nil – BS 3921:1985:CL.6
Tolerance In accordance with BS 6677:1986:CL.5.2
Mean wet skidding
resistance value
Greater than 60 to BS 6677:1986:CL.7
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Water absorption Less than 7% to BS 3921:1985:CL8.
Colours: Buff / Red / Brown
Pigments: Shall comply with BS 1014
Blocks shall be through coloured for entire thickness
23.4.2 Sampling
Two blocks shall be drawn from each group of 1000 blocks for sampling 10No
blocks in every designated 5000 block section or part thereof in a consignment.
All samples shall be clearly marked at the time of sampling in such a way that
the designated section or part thereof and the consignment represented by the
sample are clearly defined.
23.4.3 Test for Compressive Strength
Testing shall be undertaken in accordance with BS 1881.
The sample specimens shall be tested in a wet condition after being stored for
at least 24 hours in water maintained at a temperature of 27ºC ± 3ºC.
The Contractor shall, where instructed, arrange to test and submit the results of
such testing to the Engineer.
All costs for such testing are deemed to be included in the Tender.
23.4.4 Test for Water Absorption Blocks shall be tested for water absorption in accordance with BS 1881.
Blocks shall be deemed to be acceptable provided that the maximum absorption
does not exceed:
2% after 10 minutes
5% after 24 hours
23.4.5 Certificate of Compliance The Contractor is to furnish a Certificate of Compliance furnished by the
manufacturer at the time of sale in accordance with Item No12 of BS 6073,
where the independent laboratory mentioned therein shall be the Oman
Government Testing Laboratory or other testing laboratory approved by the
Engineer.
23.4.6 Granite and Stone Finishes
External granite for use in paved and trafficked areas shall be nominally 30mm
thick; cut to size and shape as shown on the drawings.
All external granite shall be “framed” to approved sample to give a non-slip
textured finish.
Granite “setts” for use on speed control humps to be saw-cut to a depth of 6mm
into the slab and framed in-situ.
External granite shall be as per detail drawings.
Contractor shall provide control samples of selected granites for approval.
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Approved samples shall be retained on site for quality assurance against
delivered materials.
23.4.7 In situ and Pre-cast Colour Conditioned Concrete In situ colour-conditioned concrete shall be poured on fully cured RC slab to
the Engineer’s approval.
Colour conditioning admixtures shall be as per engineer's instruction.
Preparation of coloured condition concrete paving shall be undertaken in strict
accordance with the approved admixture manufacturer’s written instructions.
Finished depth: Pedestrian areas: 65mm
Vehicular area: 100mm
Classification Water reducing, set-controlling
admixtures for architectural concrete.
Materials to BS 5075 : Part 1
Colouring: CHROMIX Admixtures for Colour
Conditioned Concrete
Standard colour range
Coverage rate 6kg/m2
Construction joints 5mm with edges rubbed down to a
small 2-3mm chamfer
Shear wet sliding resistance Greater than 70 to BS 6677:1986
Water absorption Less than 18% to BS 3921:1985:CL.8
23.4.8 Sealer
The completed concrete paving shall be sealed with a premium quality, durable,
water based clear sealer.
The sealer must only be applied as a thin coat at the rate of 7 – 10m2 /litre.
23.4.9 Textures and Patterns
Textures and patterns should be formed only with a special applicator using
floats and imprinting skins. Applicators shall have minimum 10 years
experience of undertaking such work.
The Contractor shall allow for providing samples of different patterns in 2m x
2m bays for Client approval.
23.4.10 Natural Stone Boulders
All natural stone shall be water-worn boulders and pebbles from approved local
wadi sources.
Boulders shall be selected to give a natural appearance.
Colour of boulders shall be light to medium brown to approved sample.
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Boulders shall be free of holes, chisel marks, saw cuts or scuffs.
Boulders shall be supplied in a range of sizes from 300mm diameter to
1500mm diameter.
Placement and orientation of boulders shall be as directed by the Engineer on
site.
23.4.11 Cobbles
All natural stone shall be water-worn cobbles from approved local wadi
sources.
Cobbles shall be selected to give a natural appearance.
Colour of boulders shall be light to medium brown to approved sample.
Cobbles shall be supplied in a range of sizes from 100mm dia. to 300mm dia.
Placement of cobbles shall be as directed by the Engineer on site.
23.4.12 Gravel Gravel to be water-worn. (Crushed gravel will not be accepted).
Colour of gravel to be mixed; light to medium brown.
Gravel shall be supplied in the following sizes:
2-5mm dia.
10-20mm dia.
20-100mm dia.
Gravel shall be placed to a minimum depth of 100mm to the approval of the
Engineer.
23.5 Workmanship
23.5.1 Pavement Construction – Sand bedding.
The sub grade and sub- base shall be prepared in accordance with this
Specification and to the Engineer’s approval.
The laying course shall consist of sharp sand to BS 882 with a particle size of
4mm, containing not more than 3% silt and/or clay by weight. The sand shall
be obtained from a single source, allowed to drain before use, and shall be
covered with suitable sheeting to minimize moisture changes.
Permissible sulphate and chloride contents shall nor exceed 0.4% and 0.06%
respectively. (Expressed only as SO3 and C1 by weight).
The laying course shall be laid to a compacted thickness of 50mm unless
otherwise Specified plus a surcharge necessary to provide the final bed
thickness after vibration of the block paving.
During laying the sand shall be carefully screeded to a smooth surface to
receive the paving blocks.
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No compaction of the sand layer and no traffic, including pedestrian traffic, are
to be permitted before the blocks are laid.
The profile of the laying course shall be similar to that of the finished surface.
The maximum deviation from the design levels shall be +10mm. The edge
restraints to the paved area shall be laid in advance of the laying course and all
obstacles within the area, such as manhole covers, shall be constructed to the
correct finished levels.
The paving blocks shall be laid on the sand laying course in such a manner as
not to disturb the blocks already laid. Each block shall be placed firmly against
its neighbour so that they fir closely together.
Joints between blocks shall not exceed 3mm.
Where blocks do not fit at the edge restraints or other obstructions such as
manhole covers or up stands, the gaps shall be filled using cut blocks. Blocks
shall only be cut using a saw. Guillotine cutters will not be allowed on site.
Any damaged or broken blocks shall be discarded. Blocks damaged during
compaction shall be replaced at the discretion of the Engineer.
Due allowance shall be made in the final levels of the base for the compaction
of the laying course above, which occurs when paving blocks are being
vibrated. The amount of surcharge required for the laying course shall be
determined by site trials prior to the commencement of the actual surfacing and
shall be repeated when the source of sand supply or a change of weather
conditions occurs.
23.5.2 Compaction of concrete blocks
After each 20m2, has been laid (or such area that has been agreed with the
Engineer) the blocks shall be compacted to the levels required using a rubber
soled plate vibrator.
The plate vibrator shall have a plate area of 0.20 to 0.35m2 and have a
compaction force of 12 to 24 kN and a frequency of approximately 75-100 Hz.
A minimum of two passes of the plate vibrator shall be made in each direction;
i.e. at 90º to each other. Vibration shall continue until no further compaction of
the sand layer is apparent. Fine dry sand with particle size of 0.3mm shall be
brushed over the paving, and further passes of the plate vibrator made in each
direction until the sand is no longer absorbed into the joints.
The plate vibrator shall not pass closer than 1m to a temporarily unrestrained
edge during laying.
No paving shall be left un-compacted overnight, except for the one meter strip
at the temporarily un-compacted edge, which shall be covered and protected
from inclement weather.
23.5.3 Accuracy
On completion, the finished surface level shall be within 5mm of the design
level and the maximum deviation within the compacted surface, measured by a
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3m straight edge, shall not exceed 5mm. The level of any two adjacent blocks
shall not differ by more than 2mm.
Any areas of paving which do not comply with these tolerances shall be
removed, and sand laying courses lifted and re-laid together with the blocks at
the correct line and level.
Dimensional accuracy, uniformity of joint gaps, alignment and square ness,
shall be checked after paving the first three rows of blocks and thereafter at
regular intervals. If the joints begin to open the blocks shall be knocked
together using a hide mallet.
23.5.4 Protection of Paving
All paving shall be protected from trafficking and saturation until all materials
are fully cured.
23.5.5 Pavement Construction – Mortar bedding
23.5.5.1 Examination
Examine surfaces to receive stone or paving specified under this section, and
conditions under which paving will be installed, with the installer present, for
compliance with the requirements for installation tolerances and other
conditions affecting performance of stonework. Do not proceed with the
installation until unsatisfactory conditions have been corrected.
The installer shall be fully responsible for accepting the condition of such
surfaces, prior to initiation of the Work.
The Contractor shall ensure that surfaces to receive stone paving are firm, dry,
clean and free of oily or greasy films, mortar, soil and other foreign substances.
23.5.5.2 Installation
The Contractor shall strictly comply with the supplier’s and manufacturer’s
instructions and recommendations, except where more restrictive requirements
are specified in this section.
Clean the sub base to remove all dirt, dust, debris and loose particles.
Where blocks do not fit at the edge restraints or other obstructions such as
manhole covers or up stands, the gaps shall be filled using cut blocks. Blocks
shall only be cut using a saw. Guillotine cutters will not be allowed on site.
Any damaged or broken blocks shall be discarded. Blocks damaged during
compaction shall be replaced at the discretion of the Engineer.
Use full, uncut units to the greatest extent possible.
Install pavers in a full mortar bed and dowel to the substrate conforming to the
following requirements:
• Prepare setting bed over sub-slab – Portland cement concrete paving.
• Mix and prepare mortar in compliance with mortar/grout manufacturer’s
instructions and recommendations. Compact setting bed and screed to
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proper depth so that tops of pavers will be level with grades and as indicate
don the drawings.
Saturate concrete sub-base with clean water several hours before placing the
setting bed. Remove surface water about one hour before placing the setting
bed.
Spread and screed the setting bed to a uniform thickness at sub-grade elevations
required for accurate setting of stone paving to finish grades indicated. Mix
and place only that amount that can be covered with stone prior to the initial
set.
Cut back, level edge and remove and discard mortar that has reached initial set
prior to placing stones. Wet stones thoroughly before setting. Set pavers in
patterns as directed by the Engineer. Pavers are to be laid symmetrically about
centre line as directed. Provide no larger than 6mm grout joints between
pavers. Set stones before initial set of mortar bed occurs. Do not set stone on a
dry bed. Apply 1.6mm thick slurry bond coat to bed or back of stone with a flat
trowel just prior to placing stones on green or wet setting bed.
Pound pavers into place with a heavy rubber mallet to obtain full contact and
adhesion with the setting bed. Do not disturb pavers after setting. Remove and
relay pavers that must be adjusted.
23.5.5.3 Tolerance Allowable installed tolerance: ±3mm in 3m. No ponding of water will
be permitted.
Stone edge to edge alignment: ±8mm in any direction.
Face width of joints: ±0.6mm in any location
Mix, install and cure grout in strict compliance with the mortar/grout
manufacturer’s instructions and recommendations. Any colouring agent added
to the grout shall be to the approval of the Engineer.
23.5.5.4 Expansion and Control Joints
Provide 9.5mm wide sealant filled joints in compliance with the relevant
specification section.
Provide sealant filled expansion joints over all cracks and joints in concrete
sub-slabs, over all changes in backing materials, where stone abuts a restraining
surface such as walls, columns, planters and dissimilar walking surfaces, all to
the Engineer’s approval.
Grout joints as soon as possible after initial set of the setting bed. Force grout
into joints, taking care not to smear grout on adjoining exposed stone surfaces.
After grout initially sets, tool the joints slightly concave. Cure grout by
maintaining in damp condition for 7 days except as otherwise indicated by latex
additive manufacturer. Pointing shall be flush unless otherwise specified.
Traffic shall be prohibited on paving and steps during setting or within 24 hours
after initial grouting of joints.
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23.5.6 Repair and Cleaning
Remove and replace loose, chipped or broken pavers. Clean exposed surfaces
using materials and methods recommended by the pavers manufacturer.
Remove and replace work that cannot be successfully cleaned.
23.5.7 Sealant
Paving surfaces are to be treated with 2No coats of proprietary sealant applied
in accordance with the manufacturer’s instructions.
23.5.8 Protection of Paving
The Contractor shall include in his rates for paving, adequately protecting all
surfaces to the satisfaction of the Engineer until the time of Substantial
Completion of the Works.
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24 Flood Gates
24.1 Scope
This Specification covers the requirements for supply and installations of flood
gates.
24.2 General
24.2.1 Related References
A. ASTM A 36 - Standard Specification for Carbon Structural Steel.
B. ASTM A 167 - Standard Specification for Stainless and Heat-
Resisting Chromium-Nickel Steel Plate, Sheet, and Strip.
C. ASTM A 276 - Standard Specification for Stainless Steel Bars and
Shapes.
D. ASTM B 26 - Standard Specification for Aluminum-Alloy Sand
Castings.
E. ASTM B 209 - Standard Specification for Aluminum and Aluminum-
Alloy Sheet and Plate.
F. ASTM B 211 - Standard Specification for Aluminum and Aluminum-
Alloy Bar, Rod, and Wire.
G. ASTM A 500 - Standard Specification for Cold-Formed Welded and
Seamless Carbon Steel Structural Tubing in Rounds and Shapes.
H. AISI CL 304 - American Iron and Steel Institute.
I. Aluminum Association - Specification for Aluminum Structures, 7th
Edition.
J. ASME Structural Welding Code Section IX.
K. FEMA #114 - Engineering Principles and Practices of Retrofitting
Flood-Prone Residential Structures.
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L. FEMA Technical Bulletin 3-93 - Non-Residential Flood Proofing.
M. SEI/ASCE 7-02 - Minimum Design Loads for Buildings and Other
Structures.
N. AWS D1.1 - Structural Welding Code - Steel.
O. AWS D1.2 - Structural Welding Code - Aluminium.
P. Aluminium Structures - A Guide to Their Specifications and Design.
Q. U.S. Army Corps of Engineers, EP 1165-2-314 - Flood Proofing
Regulations, 15 December 1995.
24.2.2 Design/Performance Requirements
A. Design watertight doors to perform under hydrostatic loads (and
hydrodynamic or other loads as specified) to control short-term load
pressures indicated. All water pressure loads and operating loads are
transferred to the building structure.
B. Standard loading: Standard Flood Barriers are designed for hydrostatic
loading, and have no additional allowances included for
hydrodynamic loads, wave loads or debris impact loads.
C. Special loading: Design Flood Barriers for hydrodynamic loads, wave
loads, debris impact loads, or other uniform loads as indicated.
D. Design Safety Factor for all watertight door Flood Barrier Models of a
minimum 2:1. Based on material ultimate yield strengths.
E. Design Safety Factor for Anchors, minimum of 4:1 for cast-in-place
concrete, or minimum of 6:1 for concrete masonry unit construction.
24.2.3 Submittals
A. Submit under provisions of Section 01300.
B. [ Product Data ]: Manufacturer's data sheets on each product to be used,
including:
i. Preparation instructions and recommendations.
ii. Storage and handling requirements and recommendations.
iii. Installation instructions.
C. Shop Drawings: Provide shop drawings showing layout, profiles, and
product components, including anchorage, hardware, and finishes. Include
dimensional plans, applicable material specifications, elevations and
sections detailing mounting and connections, and load diagrams.
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D. Calculations: Submit calculations approved by a qualified engineer, to
verify the flood barrier's ability to withstand the design loading.
E. Closeout Submittals: Provide Operation and Maintenance data to include
methods for maintaining installed products, precautions against cleaning
materials and methods detrimental to finishes and performance.
F. Manufacturer's Certificates: Certify products meet or exceed specified
requirements.
24.2.4 Quality Assurance
A. Manufacturer Qualifications: Manufacturer must demonstrate a minimum
of five years successful experience in design and manufacture of similar
flood related closures. Upon request, provide supporting evidence
including list of installations, descriptions, name and method of contact.
B. Welder Qualifications: Welders Certified in accordance with American
Welding Society Procedures: AWS-1-GMAW-S, WPS No. B2.004.90 for
applicable material used in production of specified product.
24.2.5 Delivery, Storage, and Handling
A. Store products in manufacturer's unopened packaging container with
identification labels intact until ready for installation.
B. Protect materials from exposure to moisture.
C. Store materials in a dry, warm, ventilated weathertight location. If outdoor
storage is required, block materials to store at an incline, to prevent pooling
of any moisture and promote runoff. Tarp materials in a tent-like
arrangement, elevated above the product with open sides to allow airflow.
Store all other hardware in a dry controlled environment.
D. Use caution when unloading and handling product to avoid bending,
denting, crushing, or other damage to the product.
When using forklifts, use forks of proper length to fully support product being
moved. Consult shop drawings or consult with factory for proper lift points.
24.2.6 Project Conditions
A. Maintain environmental conditions (temperature, humidity, and
ventilation) within limits recommended by manufacturer for optimum
results. Do not install products under environmental conditions outside
manufacturer's absolute limits.
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24.2.7 Coordination
A. Coordinate Work with other operations and installation of adjacent
materials to avoid damage.
24.3 Products
24.3.1 Manufacturers
A. Acceptable Manufacturer: PS DOORS, located at: 1150 S. 48th Street,
Grand Forks, ND 58201; Toll Free Tel: 800-284-0623; Tel: 701-746-
4519; Fax: 701-746-8340; Email: [email protected]; Web:
www.flooddoors.com
B. Substitutions: Not permitted.
C. Requests for substitutions will be considered in accordance with
provisions of Section 01600.
D. Obtain all watertight doors and flood barriers assemblies from single
manufacturer.
24.3.2 Equipment
2.2 Watertight Doors: Provide the following doors:
A. Horizontal Sliding Flood Barrier 6.0m wide and 2.5m high: PS Doors
Model HS-560.
B. Horizontal Sliding Flood Barrier 1.0m wide and 2.5m high
2.3 Products Details:
A. Sealing Requirements: Flood Barrier and gasket design shall provide an
effective barrier against short-term high water situations, to the protection
level indicated on Drawings.
B. Operation: Provide with latching operable from one side only (typical).
C. Mounting/Load Transfer: Anchor to existing structure. Flood Barrier
designed for specified hydrostatic pressure (and other loads as specified)
and will transfer loads to adjacent structure.
D. Frames to be cast-in-place or anchored utilizing mechanical, chemical or
other anchor types as designed. Manufacturer to include all anchors,
water-stop, and sealants, as designed.
E. Loading Direction Selection:
(1) Standard: Positive Pressure Loading: (Direction of loading against
flood barrier so as to further compress gaskets against flood barrier
frame-"seating").
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(2) Optional: Reverse Pressure Loading: (Direction of loading against
flood barrier so as to force the flood barrier away from the flood
barrier frame-"unseating").
F. Provide rectangular door opening with square corners to facilitate easy
passage.
G. Provide compression gasket which requires no inflation.
24.3.3 Materials
24.3.3.1Flood Barrier: A. Steel: Structural or formed steel shapes conforming to ASTM A 36;
tubing conforming to ASTM A 500 Grade B, ASTM A 513; bars
conforming to ASTM A 36, M1020; of appropriate size and strength with
welded construction.
B. Stainless Steel: Stainless steel conforming to ASTM A 276.
C. Aluminum: 6063 alloy conforming to ASTM B 211.
Panel Sheeting: Flood Barrier to be sheeted with steel sheeting or plate,
Commercial Quality-Low Carbon ASTM-A-569, ASTM-A-366, ASTM-
A-36 welded in place. Optional
1) Steel: Commercial Quality-Low Carbon steel conforming to
ASTM A 569, ASTM A 366, ASTM A 36; of appropriate size
and strength with welded construction.
2) Stainless Steel: Stainless steel conforming to ASTM A 167, 304
or 316 alloy.
3) Aluminum: 6063 alloy conforming to ASTM B 209
D. Gaskets to be factory mounted to flood barrier assembly. Gaskets to be
compressible rubber type, typically EPDM unless otherwise noted, and to
be field replaceable.
E. Frame to include jamb and sill members for field locating and installation
on structure. Jamb members to be designed and fabricated with
appropriate material as required for the loading.
1) Steel: Structural or formed steel shapes conforming to ASTM A
36 of appropriate size and strength with welded
construction.
2) Stainless Steel: Stainless steel conforming to ASTM A 167
using 304 or 316 alloy.
3) Aluminum: 6063 alloy conforming to ASTM B 26.
4) Aluminum: 6061 alloy ASTM B 209.
G. Threshold:
1) Stainless Steel: Stainless steel conforming to ASTM A 276, 304
or 316 alloy.
2) Aluminum: 6063 alloy conforming to ASTM B 26.
3) Aluminum: 6061 alloy ASTM B 209.
H. Frame Mounting Hardware: Provide anchors, sealant, and water stop, as
required.
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I. Operating Hardware: Provide hardware sized for the size and weight of
the flood barrier and loads. Hardware to be factory located on jambs and
barrier panels, as practical. All loads are transferred to building structure.
Latching hardware to be as indicated on Drawings. Flood barrier panel to
be factory prepared for applicable latching devices.
J. Steel Shop Finish: Apply in accordance with manufacturer
recommendations and instructions.
(1)Primer: One shop coat of manufacturer's standard shop primer (S-W
Kemflash Primer E61-R-26).
(2)Finish: Two shop coats of Standard Industrial Enamel (S-W Industrial
and Marine Coatings B54 Series)
K. Stainless Steel and Aluminum products to be mill finish, welds are
ground smooth, not polished, and are factory acid washed, neutralized
and rinsed.
L. Labeling. Each watertight door and frame will be individually identified
for matched installation.
M. Instruction Placard: Provide pictorial and written operation instruction
placards on flood barrier.
24.3.3.2Fabrication
A. Fit and shop assemble items in largest practical sections, for delivery to
site.
B. Fabricate items with joints tightly fitted and secured.
C. Supply components required for anchorage of fabrications. Fabricate
anchors and related components of same material and finish as
fabrication, except where specifically noted otherwise.
24.4 Execution
24.4.1 Examination
A. Do not begin installation until substrates have been properly prepared.
B. If substrate preparation is the responsibility of another installer, notify
Architect of unsatisfactory preparation before proceeding.
24.4.2 Preparation
A. Clean surfaces thoroughly prior to installation.
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B. Prepare surfaces using the methods recommended by the manufacturer
for achieving the best result for the substrate under the project conditions.
24.4.3 Installation
A. Install in accordance with manufacturer's installations instructions,
approved shop drawings, shipping, handling, and storage instructions,
and product carton instructions for installation.
B. Frames shall be installed level, square, plumb, and rigid.
C. Sealants, water-stop, and grouting to be applied per product application
directions and in accordance with manufacturer's instructions.
D. Field Grouting to be completed by appropriate personnel, and in
accordance with product application directions and manufacturer's
instructions.
E. Tolerances: All dimensional requirements must be in accordance with
manufacturer's installation instructions and shop drawings.
F. Field Testing:
(1) Perform visual dry test for gasket alignment, continuity contact and
pre-compression.
(2) Construct temporary water barrier and test installed flood barrier.
24.4.4 Field Quality Control
A. Manufacturers representative to verify that installation of assembly and
that the perimeter conditions are in conformance to the manufacturer's
recommendations.
B. Products to be operated and field verified including the sealing surfaces
to assure that they maintain contact at the correct sealing points.
C. Verify that hinging and latching assemblies operate freely and correctly.
D. Verify all anchorage is in accordance with manufacture's installation
instructions and applicable data sheets.
24.4.5 Cleaning
A. Repair or replace damaged installed products or components.
B. Clean all sealing surfaces.
C. Touch up damaged finish.
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24.4.6 Protection
A. Protect installed products until completion of project.
B. Touch-up, repair or replace damaged products before Substantial
Completion.
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25 Vertical Transportation Systems
25.1 Passenger Lifts and Goods Lift
The elevator(s) shall be designed, supplied, installed, tested and commissioned
by a manufacturer to the Engineer’s approval.
The work will be carried out concurrently with the work of the building
contract and the main contractor will be required to carry out certain work in
connection with the Elevator contractor.
25.1.1 General Requirements
For approved manufacturer or product specifications or the relevant BS, the
safety factor of 5 or greater shall be taken for all parts of the equipment. The
safety factors shall be calculated on the basis of maximum imposed loads.
Deviations from the requirements of the specifications may be considered but
only if they are fully detailed in a letter accompanying the Tender and the
difference in price between the specified article and that offered is stated with
the accompanying letter. If the Tender price includes for delivery of factory-
assembled cars or other equipment to the site, this should be clearly stated in a
letter accompanying the Tender, together with full details of any special
facilities required for their installation.
The wording used on drawings, notices, labels or other marks called for in this
Specification shall be in English/Arabic where indicated.
The supplier has to ensure compliance in all respects with the written
specifications.
The supplier has to ensure prior approval for any deviations and acceptable
justification for the same. Cost savings must be mentioned.
The Project Engineer/Architect has the right to accept or reject any such
deviations.
The supplier should confirm that their offer includes all critical requirements of
the Specifications which are included in the following document.
A. SERVICE ELEVATOR SPECIFICATIONS
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QUANTITY : One(1) Nos.
TYPE : Service Elevator
CAPACITY : 5000 KGS
SPEED : 0.5 M/s
STOPS/ENTRANCES : 6/6 All in line –
LANDING DENOMINATION : B,G,1,2,3,4
DRIVE SYSTEM :Variable Voltage Variable
Frequency, Gearless with
Permanent Magnet Synchronous
motor with two independent
brake system for better
ride comfort & energy saving
CONTROL : Simplex Full Collective
TRAVEL : 27.4 Mts.
CAR ENCLOSURE / FINISH
NO.OF OPENINGS : One in front
CAR INSIDE AREA : 2900mm W x 3000 mm D x
2400mm H
FRONT RETURN PANEL : Hairline finished stainless steel
SIDE & REAR WALLS : Hairline finished stainless steel
FLOORING : Zinc Coated Steel tear plate
CEILING/LIGHTING : Flat shape ceiling with fluor-
escent tubes
White Painted sheet metal
BUFFER RAIL :2 rows of solid lacquered
wooden buffer rail on the rear
and side walls
FAN : Roof mounted.- In blow
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CAR DOOR
DOOR TYPE :Automatic 4 panel centre opening
sliding steel door
DOOR OPERATION :Variable Voltage Variable Frequency
drive System
FINISH :Door panels in hairline finish
stainless steel
SAFETIES :Light Curtain & Door pressure
limitater
DOOR OPENING : 2500mm W x 2300mm H
CAR OPERATING PANEL : Hairline finished stainless steel –Full
Height
Car operating panel shall comprise of the following:
Micro movement push button in stainless steel for each floor with call accepted
light
Position indicators & Direction arrows (Digital)
Door Open extension button
DC Alarm Button
Door open button
Door Hold button
Door close button
Intercom unit
Overload indicator – Audio / Visual
Emergency Light
Fireman Key Switch
Load data
LANDING DOORS
DOOR TYPE : Same as car door
DOOR OPENINGS : Same as car door
FINISH AT GROUND FLOOR : Door panels with Narrow
Frame in hair line
Finished Stainless Steel
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FINISH AT TOP FLOOR :Door panels, and Narrow
frames in Hairline finish
stainless steel
M A P : Wall mounted at Top floor
LANDING DOOR SILL : Extruded Hard Aluminium
HALL CALL PANELS -
HALL CALL BUTTONS : Landing Call Station on the
entrance wall
HALL INDICATORS : Digital hall indicator above the
landing doors at all floors
FACEPLATES : Hairline finished stainless steel
MACHINE ROOM : Not Required
POWER SUPPLY : 3 Phase, 415 Volts, 50 Hertz
SHAFT SIZE (Available) : 4200 mm W x 3500 mm D per
lift
PIT DEPTH (Required) :2100mm clear from FFL
OVERHEAD (Required) : 4500 mm clear from FFL
SPECIAL FEATURES
Battery Operated Emergency Landing Device – Automatic
Less RPM resulting less noise, wear & tear
Easy Operating Manual Rescue device- Without external power and 100%
manual
Advanced door opening
Accurate re levelling
Intercom - 3 station Car, Top floor & Ground Floor (If Ground floor unit is
required in any other location, (Max distance 50 M), conduit & wiring to be
carried out by others.)
Emergency lighting in the car
DC Alarm bell in the car
Arrival Gong
Firemen drive
Automatic car light & fan shutoff
Car Call registered Buzzer
Drive time supervision
Nudging etc
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To be connected to the elevator monitoring system
Prevention of uncontrolled motion in up direction
Two independent brake systems
Manufactured in compliance with EN81 – 1; 1998
NEW GENERATION MACHINE ROOM LESS / GEARLESS ELEVATORS
Number of Units Six (6) Nos.
Type Passenger Elevators
Load 630 Kgs. – 08 Persons
Speed 1.0 MPS
Travel 23.2Mts. for 2 lifts and 27.4 Mts. For 4 lifts
Number of stops/openings 5/5 stops for 2 Lifts & 6/6 Stops for 4Lifts -
All in line
Floor Designations B,G, 1 ,2,3,4 For 4 Lifts ( 1 set of triplex & 1
simplex)
G,1,2,3,4, For 2 lifts – 2Nos. Simpex
Steel ropes Bright steel wires formed steel ropes with
suitable diameter to ensure a minimum safety
factor of 12. Should be lubrication free for
better safety and life - Quantity and size of the
rope according to the manufacturer to meet
the above safety standard.
Compact Gearless Machine
To make equipment 50% more efficient than a
conventional geared machine. Machine is
located at the top of hoist way, hence
maintenance free, light weight with out
gearbox machine is necessary for safety,
reliability, less noise pollution and efficiency.
Number of starts per hour 180 starts / hour must to meet the traffic in
the peak hours
Main Motor
Synchronous motor with embedded
permanent magnets with radial gap. This will
ensure better speed control and reliability,
maintenance and lubrication free.
Brake
Disk brake, maintenance free. – 2nos.
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Motion Control
Average Noise Level in car
Closed loop-Vector Control VVVF drive
system to have ultimate ride quality and
leveling accuracy of ± 5 mm.
Should be less than 55 dB(A)
Improved Design Simplicity
To reduce part count.
Controller EPac – mistake proof controller assembly
with vandal - resistant emergency and
inspection controls – Duplex opertaion
Motor R P M Should not be more than 100 to avoid wear &
tear and reduce noise pollution
Motion Control Microcomputer – AC Variable Voltage &
Variable Frequency (VVVF) for ultra smooth
ride comfort and 50% power saving, precise
leveling accuracy.
Control System Triplex Full collective selective control for 3
Lifts
Simplex Full Collective selective control for 3
Lifts
Power supply 25 Amps, 415V, 50Hz, 3P with neutral and
10Amps, 240V, 50Hz. Single phase for each
elevator.
Lift well size (Available) 1800mm (W) x 2000mm (D) – Per Lift- clear
inside Note for civil work. Shaft should be
plumbed without any deviation.
Overhead (Available)
4000mm between the last landings finished
floor level and underside machine room floor
slab.
Pit Depth
1400 mm
Elevator cabin design Suitable for Passenger elevator
Cabin internal size
1100 MM (W) x 1400 MM (D) x 2400 mm
(H)
Side panels
In Hairline Finish stainless steel
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Rear panels In Hairline finish stainless steel
Hand Rails In Hairline stainless steel finish on the rear
wall
Car operating panel In Hairline stainless steel incorporating all
operating and indicating fixtures.
False ceiling & lighting Decorative False ceiling.- Minimum of 5 type
of ceilings to be submitted for the engineers
approval
Car façade In Hairline finish Stainless Steel
Car door In Hairline finish Stainless Steel
Flooring 25mm recess for local flooring by others. Max
allowed weight for the same is 200 Kgs. and if
exceeded the capacity of the elevator will be
reduced accordingly.
Cabin sill & landing sills Extruded hard aluminium with slotted sills.
Car and landing sill gap – 25mm for safety
reason.
Door operator Door operator with mechanical reversal
switch for quick and smooth operation.
Clear door opening 800 mm (w) x 2100 mm (h)
Landing doors Centre opening type power operated
automatic sliding doors in Hairline finish
stainless steel.
Doors shall be 2 hrs fire rated
Door frames – on all floors Narrow Jambs in Hairline finish stainless
steel.
Indicators/fixtures
At All Landings
Landing call station with buttons and Hall
Position and Direction indicator above the
landing doors for better viewing and avoid
vandalism. Buttons and face plate in Hairline
finish stainless steel faceplates.
LCD display with black back ground for
better identification and user convenience.
Micro-touch hall buttons with Self lit up &
down arrows. Hairlines finish stainless steel
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faceplates.
Cabin indicator Built in latest high quality liquid crystal
display with black back ground with
Direction Arrows and it will be a part of the
car-operating panel to facilitate better view of
the position of the car.
Car chime On the car roof.
Automatic Car Return:
When there are no further car or hall calls, the
car will return and automatically park at a
specified landing.
Cut off Hall Call Switch:
When activated this feature disables all hall
calla, but allows the normal operation of car
calls. When the car has no further demand, it
parks with its doors opened at the last landing
served.
Load Non - stop:
When a car is loaded to a pre-determined
percentage of capacity, weight sensing
devices are activated, causing the car to by
pass further hall calls.
Remote Monitoring System
All the elevators should be connected to the
elevator monitoring system kept in the
maintenance room. The system should be
capable of displaying the real time view of
equipment status (Movement; location; door
operation etc). Traffic History play back like
availability; down time & generate reports
about equipment performance, availability
and operational quality. Should be able to call
and commands to be issued to the elevators
like locking of calls etc. The system,
programming etc has to be supplied and
installed by the elevator contractor
Car position Indicator:
This feature displays car position, running
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direction, fire service and overload signals.
Extra Door Time:
This feature extends the length of time the
doors Remain open.
Emergency light:
Emergency lighting in the car with trickle
charger unit with battery back up.
Communication:
3- Way communication. In car, top landing
near the control panel and care takers room
(max. wire length 250 mts cabling by main
contractor)
Door time protection:
When the doors fails to open or close, the
elevator will remove itself from the group
control, retry to open or close its doors and
sound the buzzer in the car. After three
unsuccessful attempts, the car will be shut
down.
Door protection:
A full wall height electronic curtain will be
fixed between doors which monitors
passengers boarding or existing to control
opening/closing time of the doors most
suitably and ensure automatic door reversing
(touch less).
Door Pressure Limiter
The door will reopen when ever it exceeds the
pre- programmed force while closing.
Door Speed
It should have minimum of 3 level of speed to
be programmed at site according to the
requirement of the client and should be with
variable voltage variable frequency drive
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system for quieter and smooth operation.
Door time protection:
When the doors fails to open or close, the
elevator will remove itself from the group
control, retry to open or close its doors and
sound the buzzer in the car. After three
unsuccessful attempts, the car will be shut
down.
Anti-Nuisance Car Call Protection:
When the weight of passengers in the car is
not more than 10% of rated car duty, and four
or more car calls are registered, all car calls
are cancelled automatically.
Car Call Cancellation:
When a car call button is incorrectly selected,
it can be cancelled by pressing twice on the
same button.
Nudging:
If the doors are prevented from closing for a
fixed period of time, a buzzer sounds and the
doors begin to close at a reduced speed.
Automatic Bypass (ABP)
If a car becomes near full capacity, the
elevator will automatically bypass all the hall
calls along the service direction, responding
to the car calls only.
Suitability for handicapped persons:
All elevators are suitable for handicapped
persons. Height of landing & car buttons are
suitable for handicapped as per CEN code of
practice.
Car Ventilation
Blowing fan to ventilate the car.
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Fireman emergency operation.
Elevator will have fireman switch at the main
landing with switch. On activating the
switch, the elevator will automatically cancel
all the landing calls and will immediately
respond and reach the main landing and
remain there to ensure access to fireman
people.
Manual rescue operation
100 % manual rescue should be used to avoid
external source of power supply etc for safety
INCASE OF EMERGENCY
Alarm bell:
By pressing the alarm bell in the car, a DC
alarm bell starts ringing to give an alarm
signal.
Reopen with hall button:
While the doors are closing, pressing the hall
call button can reopen them.
Repeat door close:
Should an obstacle prevent the doors from
closing the doors will repeatedly open and
close for a limited period of time for the
safety of the equipment.
Automatic Rescue Device:
Battery operated emergency landing device
will be provided to bring the elevator
automatically to the nearest landing with
continuous drive motion for safety in case of
power failure and doors open for rescue of
passengers.
Safety Gradual type
Power Consumption 3.7 KW Motor; 3,000 Kwh/a for 200000
Starts
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Buffers Standard
Guide rails
Steel tee sections.
Other features
• Automatic Circuit Breaker
• Anti nuisance car call protection
• Electromagnetic interference filter (high
frequency) to comply with EN 12015
(emission) and EN12016 (immunity)
• Manual main circuit breaker
• E&I panel at top landing can be located
in the front wall /rear wall / side wall
according to the requirement of the
engineer.
• Door open & close button
• Delayed drive protection
• Reverse phase relay
• Over speed governor
• Re-leveling
• Scrolling display at all landings and
inside the cabin to display the status of
the elevator in case of overload; Full
load; fireman drive; out of service etc
25.1.2 Builders Work and Attendance
The main contractor shall allow for all builders’ work in connection with the
elevator installation as per requirements of the Elevator contractor listed in this
schedule.
The main contractor shall also provide normal attendance including all usual
facilities for the execution of the Elevator contractor.
A clear list of builder’s works and exclusions are to be submitted with the
original offer by the Local Agent.
The lift contractor shall supply all necessary fixings, inserts and bolts for
building in to the lift shaft structure.
Steel beams for lifting tackle or for the fixing of guides in a common lift well
should be supplied and fixed by others to details provided by the lift contractor.
The lift contractor shall drill in this steelwork the holes required for supporting
or securing his equipment.
Unless otherwise indicated, the lift contractor shall supply and fix any steel
angles he requires to support the landing door frames and sills. Where inter
well pit screens are required, they shall be supplied and fixed by others.
Counterweight screens and guards shall be provided and fixed by the lift
contractor.
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All other builder’s work associated with the lift installation shall be by the lift
contractor.
25.1.3 Services to be provided by the Main Contractor
Unless agreed otherwise, the following works are deemed to be included in the
Main Contractor’s Scope of Works.
• Required data for the performance of the Contract.
• A properly framed, plumbed and enclosed elevator hoist way including,
if required, any extension of such above the roof level.
• A hook should be provided at the centre of the lift well in the roof slab.
• An air conditioner of approved type shall be provided inside the lift
shaft near the top landing.
• An elevator pit shall be provided in the lift shaft below the bottom
landing. The pit shall be waterproofed and provided with a drain or
sump (if required) and an approved access ladder.
• The hoist way shall be designed and constructed to meet the reaction
loads and forces, as furnished by the elevator supplier, resulting from
the use of the elevator.
• The Main Contractor shall do all cutting or painting of walls, floors or
partitions together with any repairs made necessary thereby.
• The Main Contractor shall install power, signal and light connections as
follows:
o A 3-phase 415V 50Hz (kVA rating as per approved drawing) AC
power supply with isolator for each elevator, at the top floor near
the operating panel.
o A single phase 240V 50Hz AC auxiliary power supply with isolator
for each elevator near the operating panel for hoist way lights, with
one light at each floor level and one at pit level
o A 15A 240V single phase 50Hz power supply, complete with
isolator switch, at the top floor near the operating panel for light
and fan installation within the elevator car.
• The Main Contractor shall furnish and erect shaft scaffolding with a
safe working platform and other temporary civil works as required for
the execution of the project. The scaffolding shall be dismantled and
removed in conjunction with the elevator contractor’s agreed
installation programme.
• To supply and fix, cut-outs, circuit breakers, lightning arrestors or other
devices that are required to meet local requirements.
• To provide temporary power of the necessary characteristics during the
erection of the elevator for lighting, tools and hoists.
• To provide temporary power as required for testing and adjusting the
elevator when required.
• To provide suitable protection to the hoist way at all times during
construction.
• To provide a safe storage room and material handling facility at the site.
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• To provide and fix any heat insulation materials on the hoist way slab
and adequate ventilation for maintaining the temperature inside the
lobby and shaft within 40ºC.
• Related builder's works of the elevator shaft
• Permanent 3 PH 415V 50HZ TPN with circuit breakers of required
capacity etc. in the top floor inside the elevator shaft. – To be connected
to the elevator controller by the lift supplier
• Shaft hoisting hooks in the elevator roof slab.
• Provision of conduits with draw wire between elevator shaft and
security/reception for elevator interphone
• Sufficient lockable covered storage accommodation to store the elevator
materials at ground floor near elevator shaft till the completion of
installation
• The building carnage facility should be extended to the elevator
contractor incase of reqmnt.3-phase power supply with the capacity and
characteristics of the final power for installation and testing purpose at
the top floor of the lift shaft.
• Separator beams in between the two lifts if there is no middle wall
• Elevator shaft lighting
• Marble/granite flooring to the elevator with the approved color and finish
• All finish work after the installation of elevators.
• Necessary insurance for the materials during storage, installation and till
handing over
• Wire mesh partition in the pit level- Pit bottom to bottom most floor
level – In between the elevators for the combined shaft
• Draw wire between the building fire system and elevator control to
incorporate the building fire system to the elevator control
• Necessary cabling for the elevator monitoring system – Connection
between the elevator controller and the elevator monitoring system
25.1.4 As-Built Drawings and Service Manuals
On completion of the elevator installation and at least one-week prior to the
date of inspection, the elevator contractor shall hand over to the Engineer, as
built elevator installation drawings. The drawings shall be duly approved and
give dimensions, critical clearances, load reactions and civil work finishes.
As built wiring diagrams shall be provided upon completion of wiring testing
and commissioning.
Two sets of Operation and Maintenance manuals are to be supplied for general
running, maintenance and repair together with specific equipment supplier
documents.
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25.1.5 Relevant Codes and Standards
The minimum standards for products specified in this section shall be as
referred to in the following Codes:
• EN-81:1998 – Safety rules for the construction & installation of lifts.
• BS 5655: Lifts and Service Lifts
• ISO 9001-2000: Standards (for local agency) for supply, installation,
testing and commissioning of elevators.
The Elevator contractor shall design, supply, install, test, commission and hand
over the complete elevator installation as specified and in accordance with the
latest regulations EN-81; 1998.
The contractor shall specifically confirm full compliance to the following EU
Directives:
• 95/16/EC – mandatory from 01.07.1999, Prevention of uncontrolled
elevator motion up and overloading, improving accessibility for the
disabled and providing means of permanent communication with rescue
service
• 89/336/EEC – mandatory on electromagnetic compatibility, covering
elevator equipment radiation and immunity aspects
• 89/106/EEC – voluntary, recommendation on construction products to
improve energy efficiency, environmental aspects and safety of use, and
to reduce noise, vibrations and fire risks
The particular specifications of the elevators are given at the end of this schedule.
The Elevator contractor shall commence the electrical installation from the
isolators (one per elevator) provided for this purpose. All these shall be
coordinated with the other contractors prior to installation, so that there will be
no areas of incompatibility.
The elevators shall be equipped with traction machinery and associated traction
equipment, elevator cars, micro computer control systems and all other
equipment and accessories required to provide a complete, modern, durable and
efficient vertical transport system.
All the electrical equipment shall be compatible with the available electrical
system of the building, as specified under electrical section.
All the components shall be selected to provide satisfactory operation under
prevailing environmental conditions at site.
The elevator contractor shall be responsible for the complete maintenance of the
elevators for a period of 12 months from the date of acceptance by the Engineer
of the completed elevator installation and shall include for cleaning, oiling and
inspection of the elevators and all the associated equipment at period of one
month and to include for all emergency calls throughout the 24 hours of the day
due to the failure of the elevator to operate normally.
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A monthly inspection sheet shall be submitted to the Engineer immediately after
each monthly inspection and cleaning and greasing.
The contractor shall also give confirmation that any fault notified will receive
immediate attention on the day of the notification.
25.1.6 Test Certificate
Safety and type test certificates from the supplier shall be provided for items
used in the equipment.
25.1.7 Capacity
Each elevator shall have a safe carrying load as specified, exclusive of weight
of complete car, cables, ropes and other accessories.
25.1.8 Lift Machines
All elevators are to be of the latest machine room less technology with a
compact machine installed inside the hoist way with a steel rope or coated steel
belt for smooth operation. There should be a factor of safety of at least 12:1 for
passenger elevators.
The lift machine shall be complete gearless type.
All components comprising the lift machine shall be mounted on a steelwork
assembly supported on vibration insulators above the front and rear wall of the
shaft.
They shall be mounted and assembled so that proper alignment of the
component parts is maintained under all conditions.
The machine shall run with minimum noise and vibration and the braking
arrangement shall bring the car to rest smoothly under all conditions of loading.
Shaft axils shall be provided with adequate fillets where shouldered.
All bearings shall be quiet running and renewable with adequate provision
against oil leakage.
25.1.9 Lift Motor
The lift motors shall run with minimum noise and vibration. Their
characteristic and their controlling device shall provide smooth acceleration and
deceleration, together with a short levelling distance, as approved to the type
specified.
The lift motor shall be capable of continuous duty cycle of 180 starts per hour
and shall have the same rating at car top control speed.
Equipment shall be provided with thermal overload device in the main motor
which shall operate in the event that the motor temperature exceeds 55ºC.
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25.1.10 Levelling, acceleration and deceleration
The stopping/levelling accuracy of the elevator car during normal operation
with or without load condition in up or down direction shall be within ±
25.1.11 Electrical Supply
The electrical supply shall be 415V/3-Phase/50Hz. The product supplied shall
function satisfactorily at the declared voltage ±10%.
The lift contractor’s electrical installation shall commence from a main switch
provided by others as per the location specified in the General Arrangement
drawing for which the lift contractor shall recommend the current rating and
minimum protection requirements. The circuit for the car lighting etc, shall be
fed from a separate switch provided by others and fused at a current rating
recommended by the lift contractor.
25.1.12 Phase failure
Motors connected to a 3-phase supply shall have phase failure protection to
prevent operation in the event of a single phase failure or reversal of building
power.
25.1.13 Speed
The rated speed of the elevators shall be as specified in the schedule.
25.1.14 Solid state control and drive technology
The elevators shall be equipped with variable voltage and variable frequency
(VVVF) control gearless motor as specified in the schedule. The motor shall
be permanent magnet embedded synchronous type with vector controlled drive
technology. The design shall be compact and capable of being installed in the
shaft and having step-less, smooth speed time characteristics.
25.1.15 Elevator Operating & Controlling System
The Group Control:-
The elevators shall operate as one group controlled by a supervisory system,
which automatically detects the prevailing traffic pattern and regulates
movement of cars according to the best service strategy at any moment or as
Simplex if specified in the particular specifications.
The elevator and group controls shall be microcomputer-based, programmed in
a high level language. The group control software shall be located in each
elevator controller, with every elevator control computer being able to assume
the system leadership. The data transfer between the computers shall be
realized with high-speed, disturbance-resistant serial link. Preferably LON
technology shall be used to ensure high data integrity and reliability.
‘Up’ and ‘Down’ directional landing call push buttons are to be provided at
each intermediate landing served by the bank, together with push button only to
be provided at terminal landings. Landing calls are to be connected to the
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elevator controllers so that failure of one elevator or group control computer
does not prevent the registering of landing calls and their normal service by the
remaining elevators. All elevators in group that may assume leadership, shall be
connected to all landing calls.
‘Up’ and ‘Down’ directional hall lanterns are to be provided at each landing
served by the bank, together with an electronic acoustic arrival signal. ‘Up’ and
‘Down’ lantern only is to be provided at terminal landings.
In each car, a car control station is to be provided. The station shall contain a
push button for each floor served with `call registered' illuminated signal
marked with appropriate floor designations, as well as an Alarm push button, a
Door open and Door close push button.
The control system shall collect statistics on elevator operation, including
number of starts, number of calls, their waiting time distributions, and log of
fault situations. An access port shall be provided on the elevator controllers to
enable viewing all these data. A basic set of data necessary for routine
maintenance shall be visible on a built-in maintenance interface.
The system shall be prepared for connection through a serial link to a
computerized elevator monitoring and command system, through which all the
aforementioned data can be accessed.
Control shall be Direction Selective-Collective and programmed for multiple
car operation. The first car to fall idle shall become the ‘home’ car and shall
automatically arrive at the main floor with its door closed. If both cars are idle
at the main floor then the last car to arrive takes over as the ‘home’ car.
Whilst there is a ‘home’ car, the other car shall be ‘free’ and shall function as
directional collective control for one car except that it shall not answer:
• A call from the Main Floor
• A call below the Main Floor
The ‘home’ car shall come into operation if:
A call is made on its own car call buttons
An ‘up’ call is made from a landing below a ‘free’ car whilst it is travelling
up.
An ‘up’ or ‘down’ call is made from a landing above the ‘free’ car whilst it
is travelling downwards.
The ‘free’ car is fully loaded or unable to answer within a pre-set period, all
the calls which it is assigned. Only one car shall answer any one landing
call.
If a lift fails to start or is taken out of normal service, e.g. Car Preference or
car top control, the other lift shall function as directional collective control
for the one car.
25.1.16 Push Button and Signal Panels
Push button and signal panels shall be finished in hairline stainless steel unless
specified otherwise. The floor designations and other markings shall be
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approved by the Architect/Engineer and shall be bold and durable. Any
abbreviations shall be clear and non ambiguous. Arabic script shall be approved
by the Engineer.
The following features shall be applicable:
• All car and landing push buttons for passenger’s normal use shall be
located between 900mm and 1400mm from finished floor level
• Push buttons shall be micro-touch with self-lit type within stainless
steel.
• Routine maintenance and lamp replacement shall not involve disturbing
any wiring which is not truly flexible and properly anchored.
• The rated voltage of indicator lamps shall be at least 10% greater than
the normal voltage of the supply to which the lamp is connected.
• Illuminated indicators with 16-segment display shall be provided in
addition to those specified in other parts of the specification.
• Car Operating Panel (COP) and landing displays shall comprise
segmental (at least 16 segments) indicators showing position and
direction arrow.
• Displays shall be large in size and shall indicate:
• Every landing on the side of door combined 16-segment digital Hall
position and direction indicators for better use convenience.
• Within cabins and at top of COP, combined 16-segment digital Hall
position and direction indicators.
• The COP shall contain the items listed below:
o Full set of car buttons (one per landing)
o “Open Door” button
o “Close Door” button
o “Alarm/Intercom” button
o Key operated switch to change from automatic to car preference
option.
Where a directional collective control system is specified, the push buttons in
the car shall remain illuminated to indicate outstanding car calls.
25.1.17 Landing Push Button Panels
One call button shall be provided at each of the terminal landings and one up
and down call button shall be provided at each of the intermediate landings.
The panels shall include a signal light for each button to indicate when a call
has been registered and will be answered.
Push buttons shall be micro-touch or capacitor type with self-lit buttons in
stainless steel casing and where indicated an illuminated arrow to indicate
direction selected.
Panels shall have complete hairline stainless steel finish to face plate
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25.1.18 Car Call Cancellation
When a car responds to the final car call in the up or down direction, all
registered car calls should be automatically cancelled to increase traffic
efficiency. After cancellation, a new car call registration is possible.
25.1.19 Automatic Bypass
If a car becomes near full capacity, the elevator shall automatically bypass all
the hall calls along the service direction and respond to car calls only.
25.1.20 Next Landing Facility
If an elevator door becomes jammed for some reason and passengers are unable
to get off at the desired floor, the elevator shall automatically proceed to the
next floor with functioning doors with all safety devices intact.
25.1.21 Safe Landing with Main Power Supply Uninterrupted
To be designed to prevent passengers from being stranded in the car when an
elevator malfunctions and stops between floors. The source of the malfunction
has to be automatically determined and when elevator operation is determined
to be safe, the car shall proceed to the nearest safe landing at reduced speed and
on arrival the doors shall open with all safety devices intact.
25.1.22 Hoisting Ropes/Belts
Hoisting Ropes shall be made of bright steel wire with fibre cores of adequate
cross-section, manufactured to BS EN81 and BS302:Part 4, or steel wire ropes
with adequate cross-section, manufactured to EN81, fixed with spring loaded
rope tension equalizer with a slack rope switch. A better proposal of
suspension with coated steel belts instead of steel ropes shall also be provided.
25.1.23 Governor Ropes
These shall be manufactured similar to hoisting ropes. The two ends shall be
securely linked to the car and attached to the safety gear-operating lever. A
weight-loaded device located in the pit shall tension the governor ropes.
At least three suspension ropes/belts shall be provided for the main suspension.
Lift installer shall provide copies of manufacturers test certificates for the rope
and belts.
The lift installer shall ensure that the car rope/belt anchorages permit
equalization and tension.
A data plate shall be fixed to the top member of the car sling near to the
suspension rope anchorage in a conspicuous position giving the following
information:
• The maximum static load on the belt in kg.
• The rated load and speed in kg and m/sec.
• A description of the suspension rope/belt construction.
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The suspension rope/belt anchorage devices at both ends shall permit and
indicate equalization of tension (e.g. long screwed shank eyebolts and matched
sets of compression springs.)
25.1.24 Counterweight
Cast iron blocks and guide shoes shall be enclosed in a steel framework to
balance the weight of the car and 50% of the specified capacity. The filler
weights shall be contained and secured within the steel frame.
The counter weight shall withstand the effect of buffer impact without
permanent deformation.
25.1.25 Guide Shoes
The car sling and counter weight frame shall incorporate heavy pattern
adjustable sliding guide shoes fitted with renewable linings of durable non-
ferrous material. For lift speeds exceeding 1.0m/sec the guide shoes shall also
be spring-loaded and self aligning. Any necessary lubrication shall be applied
by automatic means.
25.1.26 Buffers
All necessary support and mounting of the buffers shall be provided, including
any steel stools, columns or stands to support the buffers at the appropriate
height above the pit floor.
Energy accumulation type buffers shall be of the helical spring type and have a
constant spring rate.
Polyurethane buffers for speeds up to 1.00mps and oil buffers for speed
1.60mps and above shall be fitted in the hoist-way pit beneath both car and the
counterweight. These shall be securely mounted on continuous RS channels RS
channels and correctly disposed relative to the car and the counterweight.
Oil buffers shall be used when the rated speed of the lift exceeds 1.0m/sec. The
buffers shall have been tested in accordance with BS EN 81-1 and bear the type
approval mark.
Oil buffer plungers shall be of mild steel, accurately machined and designed to
provide required retardation rates. A toughened rubber bumper shall be fitted
to the top of the plunger to withstand the impact of the steel buffer plates
mounted on the underside of the car and the counterweight.
The buffers shall be so constructed as to contain any oil or hydraulic fluid
displaced during operation.
The buffers shall be permanently and legibly marked to indicate the type and
quantity of oil to be used.
An oil gauge shall be provided to check the oil level.
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25.1.27 Travelling Cables
The travelling cables shall be 450V/750V grade multi-core with stranded high
conductivity copper conductors, especially designed for lift duty, and
manufactured to EN81. Retaining straps and individual cable lamps shall
properly support these cables. Provision for plug in connections shall be given.
25.1.28 Safety Equipment
Safety gear shall have been type tested in accordance with BS EN 81-1 and
shall bear the type approval mark. The safety gear shall be compatible with the
over speed governor.
The car safety gear shall be attached to the bottom/top member of the car sling.
Where counterweight safety gear is provided, it shall be fitted to the underside
of the counterweight frame.
The gradual or instantaneous type safety system depending on the speed of the
elevator comprising of a close loop roping system, over-speed centrifugal
governor, safety gear equipment, etc. shall be provided.
In case of gradual type the operation of the system shall be such that if the car
overspeeds in the downward direction the governor jaws shall trip, operating
the safety gear. It shall, in sequence, out of the motor power supply, apply a
constant retarding force to bring the car to a gradual and smooth stop within
defined limits.
Re-setting of the safety devices shall be possible by moving the car in upward
direction.
The complete system shall comply with the relevant Sections of EN-81; 1998.
25.1.29 Over Travel – Final Limit Switches
Over travel limit switches shall be provided at the top and bottom of the
terminal landings, to disconnect the power supply and apply brakes to bring the
car to safe stop position in the event of an over travel in either direction.
Operation of the final limit switches and any well mounted terminal stopping
switches shall be effected directly by the car at the top and bottom of the well.
The switches shall be securely fixed and in a manner that normal horizontal
movement (float) of the car shall not affect their operation.
25.1.30 Evacuation Devices and Fireman’s Control
Provision shall be made to move the car automatically and / or manually from
the controller/Maintenance access panel, to a nearest landing in either direction
(depending on load conditions) to facilitate evacuation of passengers during the
power failure.
The machine shall also be provided with a manual means of operation whereby
the car can be moved to a landing by manual operation by switches provided in
EI or operating panel located either in top or bottom floor entrance.
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Where specified on the fire strategy drawings, a fireman’s control shall be
provided for the designated lift(s). Unless specified otherwise, the fire switch
shall be of the tumbler type, fitted in a flush-mounted box with a glass cover.
All lifts shall be configured to home to a designated landing in the event of the
fireman switch being operated.
An escape hatch shall be provided in the roof of each cabin
25.1.31 Elevator Car
The size of the car, interior design and decorations, ceiling and lighting and
other facilities shall be as called for in the Schedule.
The car shall be of rigid steel framework, with sound isolation, designed and
manufactured all in accordance with relevant Sections of EN-81; 1998.
The tender price shall allow for the car to be finished internally with delivered
materials as specified and for subsequent fit-out to an agreed weight by
specialists if required.
The lift car walls, floor and roof shall be made of non-combustible materials
with the exception that:
Slow burning materials may be used if all outside surfaces of such materials
forming part of the enclosure and platform are covered with sheet steel not less
than 0.5mm thick.
All surfaces within the car enclosure shall have a surface spread of flame not
inferior to Class2 of BS476:Part 1.
The car enclosure shall be resiliently secured to the car sling.
The car platform shall be resiliently secured to the car sling.
The operating buttons and keys shall be as given in the relevant Section of the
Specification.
25.1.32 Suitability for Handicapped Persons
All elevators must be suitable for handicapped persons including blind persons.
Buttons should have Braille text and numbers as required and the height of the
landing and car call buttons should be suitable for handicapped persons as per
EN Code of Practice.
25.1.33 Car Sling
The car enclosure shall be carried on a separate steel sling. When supporting
the rated load, evenly distributed over its platform, the sling shall have
sufficient mechanical strength to withstand safety gear or buffer operations
without permanent deformation.
The car sling shall incorporate at least four guide shoes, two at the top and two
at the bottom of the car sling.
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25.1.34 Ventilation
An electric fan mounted on the car roof with vents according to EN81-1; 1998.
Provide an extractor fan in the roof of the car operated automatically through a
battery supply complete with transformer and rectifier. The battery shall
provide continuous operation of the fan for a minimum of 30min.
25.1.35 Lighting and Emergency Lighting
The interior lighting of the car shall be by at least 2No mains operated
fluorescent lamps, suitably enclosed and each operated by separate control gear.
The total Illuminance at floor level shall be in the order of 200lux and is to be
specified by the lift supplier.
For Service Lifts the interior lighting shall be provided with protection against
mechanical damage.
The car light switch shall be located in the car under a lockable panel in the
COP and marked “Car Light”.
Lift lighting shall automatically extinguish when has not been used for 5
minutes.
In addition to the normal mains lighting self-contained a maintenance-free
emergency light shall be installed complete with a trickle charger and battery.
Minimum operation time shall be 1 hour. The installation shall be in
accordance with BS5255:Part 1. The lighting shall be energized automatically
following the failure of the main supply to the normal lighting.
The lamps for the emergency lighting shall be located and rated such that, in
addition to giving some general Illuminance of at least 0.5lux over the front of
the car to distinguish the car threshold, they should also distinguish the
telephone cabinet and the alarm button. If incandescent lamps are used at least
2No lamps of equal wattage shall be provided and connected in parallel.
The battery for the emergency lighting shall have sufficient capacity to
maintain the simultaneous operation of the emergency lighting for at least half
an hour and the emergency signal for at least one hour.
The emergency lighting unit shall be fed from the live side of the car light
switch. It shall automatically recharge the battery upon restoration of the
normal mains supply after being discharged. The battery shall within a 14 hour
period be capable of again meeting the power supply requirement. At the end
of the specified discharge period, the battery shall provide not less than 85% of
its normal voltage at 15ºC with the normal load connected.
25.1.36 Working Platform
A working platform, complying with EN-81; 1998 shall be provided on the roof
of the car.
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25.1.37 Fascia Plates
Where the landing thresholds are designed to project into the lift well, sheet
fascia plates at least 100mm wider than the clear door opening (symmetrically
located) shall be provided between the undersides of each track or sill and the
top door supporting frame below. A steel ramped apron shall be provided
below the lowest track or sill.
25.1.38 Car and Landing Doors
The car and landing doors shall be fully automatic, centre / side opening, sliding
doors as specified in the schedule.
The finish of the doors shall be stainless steel with hairline finish as per the size
detailed elsewhere in this specification and shall comply in all respects with BS
EN 81.
Opening of the landing doors manually shall shut down the equipment and a
manual resetting shall be required to restart the equipment for safety reasons.
25.1.39 Sill, Guards, Door Suspension
Each door shall be complete with a combined track and sill in cast aluminium
alloy or in stainless steel on a supporting steel frame. Each panel should have a
two-point adjustable suspension element and robust anti-tilting device. They
shall run on wheels fitted with sealed bearings that shall be easily renewable
from the cabin top,
Guide shoes shall be fitted at the bottom of the door panels to prevent twisting
during operation.
25.1.40 Door Operation
Closed loop door operation
Car and landing doors shall be automatically operated with VVVF digital
closed loop door operator either with belt drive or direct coupled rope driven
micro-processor controlled mechanism with encoder for smooth movement and
minimum noise. Doors shall be provided with the following safety features:
Door load detector.
When an object is caught in opening/closing mode the doors will reverse
direction when an excess load is detected. This function shall ensure maximum
safety to users.
Door protection.
A door protection 2D electronic curtain up to full height of the door shall be
fixed between doors which shall monitor passenger and goods loading in the
elevators and re-open the doors if there is any obstacle in the doorway.
Door nudging feature
In the event of any door safety device malfunction, a temporary override
function is to be automatically engaged to close the doors, thereby preventing a
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fault in elevator operation. Once the doors have closed completely the override
has to be cleared and normal operation resumes.
Advance door opening:
During normal operation the opening movement of elevator doors shall start in
the levelling zone and be substantially complete in operation by the time the car
has stopped at the landing within the limits specified in BS EN 81-1.
Door open and close buttons inside cabin:
The elevator car shall be supplied with door open & close buttons inside the
cabin with the following functions:
• Door open button: When the elevator is in the idle mode with the
doors closed or closing in normal mode, pressing this button will
immediately open the doors.
• Door close button: When the elevator doors are fully open, by
pressing this button the elevator doors will close immediately.
Note that the individual door open/close and reopen timings should be
adjustable between 0 –5 sec.
25.1.41 Door Locks
When both panels of centre opening doors are indirectly linked, e.g. by wire
cord, belts or chains, each panel shall be electronically interlocked to prevent
the lift car from being started or kept in motion (other than for slow speed
levelling or re-levelling) unless all car and landing doors are closed.
The locks shall have been tested in accordance with BS EN 81-1 and shall bear
the type approval marks.
Any trailing panel, e.g. two panel side opening doors, shall be directly
mechanically linked to its leading panel in the closed position.
It shall not be possible in normal lift operation to open the car door whilst the
lift is in motion, except under the conditions noted in 31.1.31 ‘Advance Door
Opening’.
The lift contractor shall state in the tender response the maximum landing door
gap that the door locks will tolerate. This shall be on the basis of what will be
demonstrated during the acceptance tests by the use of rectangular obstructions
standing 100mm high on the sill (on the go/not-go principle).
25.1.42 Landing Entrance
Landing entrances shall have the certified fire resistance of 2 hours.
Landing entrance architraves shall be provided where specified. The tender
price shall allow for the design (in the material specified) shown in an
illustration attached to the Tender. This drawing shall show clearly the extent
of work that is to be included in the lift Tender.
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The material and finish of the landing door panels and any architraves shall be
directed and approved by the Engineer.
The lift contractor shall provide with his tender a full description of the
materials and decorative finishes, including the colour, surface texture and
grade of finish for the door panels and architraves included in his Tender. The
lift contractor shall be willing to substitute to an equal or agreed value different
materials and finishes if so required by the engineer or contract administrator.
25.1.43 Levelling accuracy
The maximum difference in level between any landing and the car floor, after
travelling in either direction (with the braking adjustment set to suit general
passenger traffic) shall not exceed 5mm. The levelling accuracy shall be
demonstrated under these specified load conditions during the acceptance tests.
25.1.44 Safety Features
Emergency unlocking key from landing side provided on the header trim of the
landing door for evacuation and maintenance work.
Manual opening of the doors from inside the car, within landing zones during
power failure.
Full door height curtain of light shall be provided to reopen the doors when
there is any obstruction to door closing. In addition to curtain of light, force
limiters shall also be provided to reverse the closing of the doors in case of
obstruction to door closing.
Electrical interlocking to operate in conjunction with the car doors, so that
elevator cannot operate unless doors are closed and locked.
Overload indicator with buzzer. If the car is overloaded it shall be prevented
from starting. The blinking overload indicator and the sounding buzzer shall
signal the overload condition to the passengers.
Emergency light with trickle charger and battery.
25.1.45 Performance
The single floor flight time stated by the lift contractor in the Tender letter,
shall be demonstrated during the acceptance tests and shall mean the time taken
for a single floor run with the test floor to floor distance as shown on the tender
drawings, when raising the rated load with the acceleration and braking
adjusted to suit general passenger traffic.
The time shall be measured from the instant the brake is released to the instant
the brake is applied.
25.1.46 Testing
On completion, a thorough test of the elevators under the working conditions
shall be carried out in the presence of and to the approval of the Engineer.
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All materials used must be of highest quality and the best of their respective
kinds and must comply with the relevant EN-81; 1998. All weights necessary to
carry out the full load and overload tests must be provided by the Main
contractor and removed after use.
The Tests include the following:-
• No load current and voltage readings both on "Up" and "Down” Circuits.
• Full load current and voltage readings both on "Up" and "Down”
Circuits.
• One and quarter load current and voltage readings both on "Up” and
"Down" Circuits.
• Stalling current and voltage and time taken to operate overload.
• Overload protection.
• Gate sequence relays, if provided and installed.
• All interlocks.
• Collective control and priority sequence, if installed.
• Safety gear mechanism.
• Speeds on Up and Down travel with full loading and empty car.
• Door contacts.
• Final terminal stopping device.
• Normal terminal stopping device.
• Insulation and earth continuity.
The Contractor shall give the Engineer at least seven days written notice of the
proposed date for the acceptance tests.
The lift contractor shall have the type test certificates for the locks, buffers
(where applicable), safety gear, landing doors, over-speed governor, ropes and
belts, motors and motor generators for examination during the site test.
25.1.47 Controller
The controller shall be placed in the lift shaft and shall be provided with a sheet
metal enclosure with convenient opening front access door. If the enclosure
houses major heat producing components such as resistor banks it shall be
provided with suitable ventilation.
All resistors installed shall be adequately supported.
All heat generating components in the elevator controllers are to be properly
self-ventilated and provided with sheet steel enclosures. Main controller and
drive components are to be installed inside the hoist way with only the simple
operating panel outside the hoist way on the top landing for all elevators.
Materials used in the construction of the control equipment shall not support
combustion.
The components shall be designed and mounted in a manner which facilitates
inspection, maintenance, adjustment and replacement. They shall be
permanently labelled and the codes or abbreviations shall match the wiring
diagram.
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Control circuits at normal mains voltage shall be connected between phase and
neutral and shall be supplied through an isolating transformer. The transformer
shall be double wound with earth screen between primary and secondary
windings and one pole of the secondary winding shall be earthed through a
removable link. The removable link is for test purposes and no switch, fuse or
device shall be placed in that pole or circuit. Removal of the link shall prevent
operation of the lift.
A six figure counter shall be provided on the controller or in the operating
panel to register the number of operations of the lift car.
25.1.48 Solid state controls
When offering solid state controls which require more stringent environmental
conditions that those specified in BS EN 81-1:Part 1 to ensure correct and
stable lift operation, the lift contractor shall include in his tender for the
necessary equipment to provide the correct conditions. Full details of this
equipment shall be provided in a letter accompanying the Tender.
Microprocessor based lift controls will be considered, provided full technical
details are submitted with the Tender to enable the performance of the system
to be assessed.
Microprocessor based controls shall include the following design features:
The system hardware shall be capable of fully supporting software based
supervisory and motor control systems.
Interruption of the electrical supply to the lift shall not affect the system
memory or the software. (None volatile).
It shall be possible to change the supervisory control algorithm to meet a
change in use of the building by re-programming the instruction memory.
It shall be possible to interrogate the system operating functions by use of a
portable unit using diagnostic routines. This shall be achieved by means of
communication access/test points on the controller.
Visual indicators (e.g. LED’s) shall be provided on the controller to display
information on the operational status of the lift.
Multiplexing techniques may be employed to reduce the number of trailing
cables normally required, if considered cost effective to do so.
25.1.49 Control system features
The following control features shall be included:
Car Preference
Operation of the car preference switch shall change the control from
‘automatic’ to car preference and vice versa. On ‘car preference’, control of car
movement shall be possible from the car only and the doors shall remain open
until a car call is registered for a floor destination.
All landing calls shall be by-passed and the indicators shall not be illuminated.
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On multiple lift installations the changeover operation shall not cancel
registered landing calls
Car top control station
The car top controls shall comply with the requirements of BS EN 81-1 and
shall include the following combined into one convenient station:
Doors OPEN/CLOSE switch with the open and close positions legibly marked,
or two push buttons with open and close functions legibly marked.
Permanent light fitting, suitably protected and separately switched.
13A socket, complying with the requirements of BS1363, which shall be fed
from the car light supply.
A permanent notice reading “Tools and hand lamps to be certified double-
insulated type, maximum 1000 Watts” shall be fixed adjacent to the 13A socket
outlet. The control station shall be placed and designed so as to prevent it from
being operated accidentally
A terminal stop limit switch associated with the car top control operation shall
be provided which shall, when the car is moving in the upward direction, stop
the car with its roof not less than 1.8m from the top of the well.
Emergency electrical operations switch (change-over switch)
Up and Down push buttons with their functions legibly marked.
A push button that renders inoperative the electrical safety devices stated in BS
EN 81-1. The push button shall be legibly marked to indicate this function.
25.1.50 Intercom & Emergency Signal
Inter-phone for two way three station hands free (inside car only)
communication between the elevator cabin, top landing lobby and security
personnel at ground floor/or the centralised maintenance room (with a
maximum distance of 250m). Wiring shall be provided by the Main
Contractor.
In addition to the facilities for the emergency intercom, the Tender price shall
include for an alarm bell (with indicator for multiple lifts) at the main reception
desk, powered by the emergency lighting battery. The lift contractor shall
check the suitability of this arrangement with the consultant before installation.
While depressed, the alarm button in the car shall illuminate to indicate that the
emergency signal is functioning and shall activate the intercoms. Wiring shall
be provided by the Main Contractor.
25.1.51 Closed-Circuit TV
Closed circuit TV (CCTV) shall be provided and installed within each
passenger and service lift car by others.
The lift contractor shall make provision for the installation of cableways for the
CCTV signal and power cabling from the lift controller to the lift car.
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25.1.52 Electrical Installation of Elevators
General wiring throughout the installation shall be carried out as specified in
the Electrical Specifications. Plastic (EN-81; 1998) trunking shall be used
wherever possible instead of multiple conduits. Flexible conduits shall be used
between trunking and apparatus. All conduits in the pit bottom shall be
metallic.
Earthing of all the equipment shall be carried out as specified in Electrical
Specification and as per IEE Regulations.
Distribution Equipment shall contain all protection equipment for motors and
circuits. These shall include overload protection, short-circuit protection, single
phasing protection, etc. as appropriate.
25.1.53 Operation on standby power supply
A standby power supply shall be provided by others. (If applicable)
When standby power becomes available following the failure of the normal
mains power supply, all lifts connected to the standby power shall return
automatically to the main floor one at a time in sequence. The control system
shall enable the cars to restart irrespective of their position in the lift well. On
arrival at the main floor each lift shall park with doors open and shut down.
When all lifts have shut down at the end of the parking sequence, one lift (the
Fireman’s lift when provided) shall respond to car and landing calls in the
normal manner. When the normal mains supply is restored, the lifts shall
automatically return to normal service. The lift contractor shall check the
suitability of this arrangement with the Engineer before manufacture.
For standby power operation, the following shall be provided by others.
• The standby power supply.
• A change-over switch
• Pair of voltage-free cable runs to the machine room from a normally
closed auxiliary contact on the changeover switch.
An alternative method of connection will be considered provided full details are
given by the Tenderer in a letter accompanying the Tender.
Any electrical installation work for the interconnection of separate lifts or
groups of lifts for sequencing purposes are to be connected to the same standby
power supply.
25.1.54 Painting
With exception only of specifically and self finished surfaces, the whole of the
equipment shall be painted one coat in the factory after full and proper
preparation including priming.
For exposed feature elevators the colour shall be strictly in accordance with the
Architects direction in approved colours.
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Parts not normally accessible after erection such as the vertical car sling
members shall have an additional coat applied in the factory.
25.1.55 Sundries
A non-fading single-line wiring diagram shall be durably mounted and fixed in
the maintenance personnel room.
Detailed instructions regarding the moving of the lift in an emergency in
accordance with BS EN 81-1 shall be durably mounted and fixed in the
maintenance personnel room before the acceptance tests.
A danger notice complying with the requirements of BS EN 81-1 shall be
affixed in the maintenance personnel room
25.1.56 Noise Levels
The average running noise level measured in the lift car should not exceed 56
dBA for passenger lifts and 60 dBA for service lifts.
25.2 Execution
25.2.1 Examination
The Contractor shall verify site conditions under the provisions of EN81 & 115.
Before ordering materials or commencing work the Contractor shall verify that
the building structure associated with the system is within tolerance and take
full account of the shape, configuration and material properties of the structure.
25.2.2 Preparation
Prepare all surfaces and building fabric as required. Ensure necessary
scaffolding, load hooks, power supply, room for storage, transport etc are
available to ensure smooth installation of the works in accordance with the
agreed programme.
A list of work and exclusions to the contractor’s work to be treated as others
responsibility are to be clearly stated. The same works shall be co-ordinated at
site as and when required by the lift contractor and to be executed by others
prior to proceeding with the installation.
The lift contractor shall use appropriate checklists and mutually agreed
schedules to ensure readiness of the site
25.2.3 Handling and storage
System component parts shall be delivered to site, completely identified in
accordance with coordinated working drawings and shop drawings prepared for
this work. Components shall be stored in accordance with manufacturer’s
instructions, above ground, properly protected from the weather and
construction activities.
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25.2.4 Installation
Before beginning installation in any area, examine all parts of the adjoining
work into which applicable work is to be placed. Should any conditions be
found which will prevent the proper execution of the work, installation shall not
proceed in that area until such conditions are corrected by the main contractor.
25.2.5 Field Quality Control
Field quality control shall be provided under provisions of ISO 9001-2000:
Quality Control and the pre-established local agent’s ISO 9000-2000
procedures.
As per procedure, necessary documents to be filled as and when required.
All such documents are to be made available for inspection at the site during
the entire process of installation until handover of the project.
25.2.6 Cleaning
Clean all equipment and the surrounding area as necessary. Lubricate the
moving parts of the installed works as per the manufacturer’s recommendations
before handover the same to the Client.
25.2.7 Protection of finished work
Work shall be protected reasonably by the contractor. Any additional protection
required at site shall be by others. However, up to the handover of the
equipment the responsibility of arranging the necessary protection of the
installation shall rest with the lift contractor.
25.2.8 Maintenance requirements
25.2.8.1 Planned Maintenance
The lift contractor shall allow for at least 11No routine visits at regular intervals
during normal working hours to carry out preventative maintenance during the
12 months following acceptance.
The lift contractor shall:
Maintain each lift in accordance with his planned maintenance routines during
normal working hours.
Forward copies of the said routines with his tender.
25.2.8.2 Corrective Maintenance
During the 12 months maintenance period following acceptance of the
installation, the lift contractor shall provide a ‘call-out’ service 24hrs x 7 days
per week with zoning maintenance service to carry out corrective maintenance
(including adjustment and repair) to restore a lift which has ceased to meet an
acceptable condition.
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25.2.8.3 Emergency Maintenance
During the twelve months following acceptance of the installation, the lift
contractor shall provide a call-out service, both during and outside normal
working hours to carry out emergency maintenance.
The lift contractor shall arrange for a qualified technician to attend to
emergency maintenance calls on his behalf when the lifts to be maintained are
such a distance from his depot that he cannot comply with this Clause in
person.
25.2.8.4 Workmanship and Materials – General
The lift contractor shall supply all labour, tackle, materials, lubricants and
replacement parts (including lamps) for the complete execution of the
maintenance works.
The work shall be carried out by competent tradesmen conversant with
statutory regulations and the rules and regulations of the local authority
concerned.
25.2.8.5 Schedule
This Schedule is intended to be used as an indication of work within this
section. It is not necessarily comprehensive or complete and it is the
Contractor’s responsibility to ascertain to complete the full works intended and
as shown on the drawings, specification and Contract or thereby implied.
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26 Asphalt Paving
26.1 General
26.1.1 Scope of Works
The scope of works for asphalt paving includes all works required to install roads,
and kerbs areas, in areas where the internal roads meet the existing road and with
all associated finishes in areas of vehicular traffic such as markings etc.
26.2 Asphalt Paving
All works and materials with exception of Method of Measurement and Basis
of Payment, to be in accordance with the Sultanate of Oman General
Specifications for Roads April 1994:
Section 300 Granular and stabilised sub-base, base course and
stabilised sub-grade (subsections 301, 302, 303)
Section 400 Bituminous Pavement (Subsections 401, 402, 405, 406).
Section 1400 Road markings (sub section 1402)
Section 1800 Plant and Equipment (Subsections
1801,1802,1807,1808,1809 and 1810)
26.3 Concrete Kerbs
26.3.1 Description
The work shall consist of the construction of kerbs in accordance with the
Specification and in conformity with the lines, grades and typical sections
shown on the Drawings or established by the Engineer.
26.3.2 Materials
Concrete
Concrete shall conform to the requirements of the concrete Specification for
concrete C25 type 3.
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26.3.3 Fabrication
26.3.3.1 General
Kerb sections shall be pre-cast from concrete produced from fully automatic
batching plant. The kerbstones shall be cast hydraulically and shall be of solid
concrete. Kerbstone cast in two layers shall be rejected.
26.3.3.2 Testing
Tests shall be carried out on the concrete mix prior to use to ascertain that the
strength and surface finish requirements can be met. If the required strength
and surface finish is not obtained, then the Engineer may order revisions to be
made in order to achieve the special requirements.
26.3.3.3 Dimension
Kerbs shall be manufactured to the dimensions shown on the Drawings. For
horizontal curves of radius less than ten (10) metres, kerb sections shall be
manufactured to the radius shown, and in no circumstance will straight units or
portions of same be permitted.
In general dimensions of kerbs shall be as indicated by Ministry of
Communication, Highway Design Standard, Drawing DS 1.26.
26.3.3.4 Surface Finish
The finished product shall be of solid appearance with clean faces, be free of segre-
gation, honeycombing, pits, broken corners or other defects.
Curves faces shall be of constant radius with a smooth change from radius to plane
face.
Tolerances of manufacture shall be three (3) mm in any one dimension and end
faces shall be truly perpendicular to the base.
All concrete surfaces against soil shall receive three coats of bituminous paint
to a paint thickness of 350 microns.
26.3.4 Construction
26.3.4.1 Setting Out
Kerbs shall be set out to the lines and grades shown on the Drawings. Under no
circumstances will it be permitted for levels to be set by direct measurement
from pavement layers.
26.3.4.2 Sub-grade
The sub-grade shall be excavated to the grades and sections shown on the
Drawings.
The sub-grade shall be compacted to a uniform density as approved by the
Engineer. Unsuitable material shall be excavated 150 mm below sub-grade
elevation and replaced with suitable backfill material, which shall be compacted to
meet the specified requirements. All sub-grade shall be compacted and graded to a
smooth surface and shall be approved by the Engineer before placing concrete.
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26.3.4.3 Bedding Kerbs
Kerb sections shall be laid either directly onto a wet concrete base or onto a
sand/cement (3:1) mortar bedding, 20 mm thick, on a previously laid concrete
base. The dimension of the base shall be as shown on the Drawing SCD 2.l of
Ministry of Communication Highway Design Manual 1994.
26.3.4.4 Kerb Haunch
After kerb units have been laid contiguous, haunching shall be poured using
approved forms. The concrete shall be the same as that used in the base.
No pavement layers shall be laid against kerning until such time as the haunching
is complete, cured and backfilled and the backfill compacted.
26.3.4.5 Joints
Joints between kerb sections shall have a width of four (4) mm and be filled
with a sand/cement (1:1) mortar plasticizer, and sufficient water to make the
mixture plastic and easily smoothed. A grooving tool shall be used to produce
a smooth circular section groove not more than three (3) mm deep in all joints.
Grouted joints shall be cured by an approved method to the Engineer’s
satisfaction. Expansion, contraction and construction joints shall be provided as
directed by the Engineer.
All kerbs shall be thoroughly cleaned of all extraneous material prior to
approval.
26.3.4.6 Tolerance
Kerbs shall be laid within tolerance of plus or minus three (3) mm, at each end
of element, to the lines and grades given on the Drawings.
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27 Through Coloured Render
27.1.1 Location
One Coat Through Coloured pre mixed pigmented render for application to all
external walls (except areas of stone cladding).
27.1.2 Product Specification
Product : Weber.pral M Monocouche Render (or equal Approved)
27.1.3 Finish
Scrape textured finish
27.1.4 Background:
Masonry suitable to take a designation III (1:1:6) mix (should be confirmed by
block manufacturer).
27.1.5 Preparation
The nature and condition of the background is a prime consideration in
deciding the preparatory treatment
Prior to the application of weber.pral M. Substrate must provide suitable key /
suction. Guidance in respect to movement
joints and bed joint reinforcement should be obtained from block manufacturer
and MUST be adhered to. The
recommendations detailed in BS5628 : Part 3 and BS5262 should be observed.
27.1.6 Render Coat:
Proprietary reference: weber.pral M by Weber (or equal approved)
Colour: To be agreed from Standard Colour Range.
Thickness: 15mm (finished)
Finish: Scraped.
Angles – weber.pral renders:
Except where specified otherwise, form external angles using clean, straight
chamfered timber battens.
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When the surface is sufficiently hard, normally between 5-16 hours after
application, scrape the surface in small circular
motions using a weber Scraping Tool to remove all laitance and bring the
application to the specified thickness. Remove no
more than 3mm from the surface thickness.
Immediately after scraping, brush using a clean soft bristle brush to remove
dust.
Ensure scraped finish is even over the entire surface, with no areas missed.
27.1.7 Accessories
Render only beads shall be of appropriate design, gauge and material as
approved by Weber. Beads to be located and fixed as detailed on System
Manufacturer's details (this may involve bedding RO beads in mortar).
Where mesh cloth is being incorporated as treatment to areas of potential high
stress it shall be Weber. mesh standard duty, balanced, open weave, glass fibre
mesh cloth, coated for alkaline resistance, available in 1m x 50m rolls.
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28 Carpets
28.1 General
28.1.1 Scope of Work
Supply and installation of carpeting where shown on the drawings or as
indicated in the finishes schedule.
28.1.2 Relevant British Standards
Conform to the requirements of the following British Standards where
applicable:-
BS 1006 : 1974 Methods of test for colour fastness of textiles.
BS 4223 : 1989 Methods for determination of constructional details of
textile floor coverings with yarn pile.
BS 4682 : Methods of test for dimensional stability of textile floor
coverings.
BS 5229 : 1982 Methods of determination of tuft withdrawal force for
carpets..
BS 5325 : 1982 Code of Practice for the installation of textile floor
coverings.
BS 5422 : 1989 Classification of Adhesives for construction.
BS 5808 : 1979 Specifications for underlays for textile floor
coverings.
28.1.3 Literature and Samples
Provide comprehensive technical literature on proposed materials with
illustrations of all colours, patterns and textures available. Provide samples
of proposed products if so requested by the Engineer.
Selection of product type, colour, pattern and texture is to be to the approval
of the Engineer.
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28.1.4 Guarantee
All carpeting is to be guaranteed for a period of at least 10 years from date
of project handover against excessive surface wear, edge ravel, backing
separation, shrinking, stretching and static electricity.
“Excessive surface wear” means loss of more than 15% by weight of face
fibre.
28.2 Materials
28.2.1 Carpet
Proprietary heavy duty commercial quality tufted broadloom carpet “Autumn
Harvest” or equivalent range by “Lees Commercial Carpets” or equal and
approved. Colour will be selected by the Engineer.
28.2.2 Carpet Accessories and Fixing Materials
This includes underlay, edge binding tape, joining materials, grippers, etc.
All such items are to be as recommended by the carpet manufacturer, and as
approved by the Engineer.
28.2.3 Edging Strip
Proprietary ribbed 25mm wide solid brass clip-in cover strip.
28.2.4 Adhesives
As recommended by the floor finish manufacturer of a type that allows the
floor covering to be securely installed and easily stripped.
28.3 Execution
28.3.1 Execution Generally
Comply with BS 5325 Installation of textile floor coverings subject to any
qualifications given below. Where necessary, check the dryness of the base
in accordance with the appendix to the CP.
28.3.2 Preliminary Checks
Ensure that working conditions and background are suitable. Bases shall be
clean and dust free, smooth, level and dry. Ensure there is sufficient
material from the same production run for each specified type to guarantee
uniform appearance when laid.
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28.3.3 Planning and General Layout
Wherever possible and appropriate, lay carpet/linoleum with consideration to the
following general requirements; when requirements conflict, agree the
procedures with the Engineer:
a. Seams to run the length of the area.
b. Traffic routes along rather than across seams.
c. Light from windows not falling across seams
d. Pile laying away from lighting.
e. Seams lining up in direction of manufacture.
f. Avoidance of cross-seams.
g. Patterning matched.
Lay out flooring material before cutting to layout approved by the Engineer,
allowing for ready access to floor trunking or the like.
Lay out material to minimise cutting and avoid unduly narrow or small cut-
offs.
28.3.4 Working with Adhesives
Comply with the following when laying carpets or linoleum on adhesive:-
a) Clean the base and prime if necessary: allow primer to dry thoroughly.
b) Ensure there is adequate ventilation. Do not smoke (tobacco smoke
and some adhesive fumes combine to form poisonous gases).
c) Spread adhesive to an even coverage without trowel ridges.
d) Remove any spilt adhesive with solvent immediately.
28.3.5 Installation Generally
Installation to be carried out in strict conformance with the manufacturers
written instructions.
28.3.6 Completion
Leave floor finish clean and adequately protect the completed installations from
any contamination or traffic that could harm the flooring till handover.
28.3.7 Warranties
Wear - Lifetime of carpet. No more than 10% face yarn loss by weight in
normal use.
Static- Lifetime
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29 Flagpoles and Flags
29.1 General
29.1.1 Scope of Work
Supply and installation of flag and flagpole where shown on the drawings.
29.1.2 Literature and Samples
Provide comprehensive technical literature on proposed materials with
method of installation. Prepare and submit shop drawings for Engineer’s
approval.
29.2 Materials
29.2.1 Flagpoles and flag
Proprietary ‘Zephyr’ outdoor Flagmaster flag poles and flags or equal
approved.
Nominal Length Of Flagstaff 6.0m [2 section]]
Height Above Ground, [ using ground socket ] 6.16m
Top Section Diameter 64mm
Bottom Section Diameter 76mm 76mm
Ground Socket Diameter [ internal ] 77mm
Ground Socket Diameter [ external ] 83mm
Length Of Ground Socket 850mm
Overall Length Of Flagstaff 7.01m
Packed Size 4.3 x 0.10 x 0.10 m
Packed Weight 16kg
Foundation – To be designed by installer.
Flag Size [Landscape] 180 x 120cm [2yrd ]
29.3 Execution
29.3.1 Installation Generally
To be installed in accordance with supplier’s specifications and directions.
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30 Carpark shades
30.1 General
30.1.1 Scope of Work
Supply and installation of propreitory carpark shade structures where shown
on the drawings.
30.1.2 Literature and Samples
Provide comprehensive technical literature on proposed materials with
method of installation. Prepare and submit shop drawings for Engineer’s
approval.
30.2 Materials
30.2.1 Carpark shades
Proprietary ‘K-Span’ carpark structures or equal approved.
The support framework to be in factory painted G.I. steel. Vertical
cantilevered supports to be at 6.0m c/c and to cover a length of 6.25m.
Roofing to be powder coated, K-span roofing sheet.
Foundation to be designed and constructed taking into consideration the
above spans, wind load, etc.
30.3 Execution
30.3.1 Installation Generally
To be installed in accordance with supplier’s specifications and directions.
The construction to be water tight.
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31 Epoxy Resin Flooring
31.1 General
31.1.1 Scope of work
The supply and installation of Epoxy Resin Flooring Finish to:
• Bullion vehicle parking
• Vault
• Armoury
31.2 Material
31.2.1 Resin Flooring Product For Areas Not Exposed To Weather Or UV Radiation (Toilets)
Substrate: Concrete, Cement based screeds, polymer-modified cementitious
screed.
Preparation: Captive shot blasting to remove top skin of cement, laitance, and
cement slurry.
Resin flooring system:
Manufacturer: BASF Construction Chemicals UAE LLC, PO Box 37127,
Dubai, UAE (or equal approved).
Primer reference: MASTERTOP Primer 2 applied at 0.15-0.30 kgs/m2
Resin flooring reference: MASTERTOP 1330 -Polyurethane Waterproofing
and Protective Traffic Deck Coating System with Crack Bridging Ability and
UV resistant top coat
Application: 1.2-2.0 mm
Colour: 3-Tone colour schemes differentiating parking spaces, driveways and
walkways
Surface finish/ treatment: Top coat (2 coats minimum) MASTERTOP TC 458
Flatness/ Surface regularity:
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Sudden irregularities: Not permitted.
Classification of surface regularity to BS 8204-6: SR2.
Other requirements: Coving /Skirting/ Upstands As per manufacturer’s
recommendations
Resin Flooring Product For Parking Areas Exposed To Weather Or UV
Radiation (External Areas)
Substrate: Concrete, Cement based screeds, polymer-modified cementitious
screed.
Preparation: Captive shot blasting to remove top skin of cement, laitance, and
cement slurry.
Resin flooring system: Manufacturer: BASF Construction Chemicals UAE
LLC, PO Box 37127, Dubai, UAE (or equal approved).
Primer reference: MASTERTOP Primer 2 applied at 0.15-0.30 kgs/m2
Resin flooring reference: MASTERTOP 1332 -Polyurethane Waterproofing
and Protective Traffic Deck Coating System with Crack Bridging Ability and
UV resistant top coat
Application: 1.5-2.0 mm
Colour: 3-Tone colour schemes differentiating parking spaces, driveways and
walkways
Surface finish/ treatment: Top coat (2 coats minimum) MASTERTOP TC 458
Flatness/ Surface regularity:
Sudden irregularities: Not permitted.
Classification of surface regularity to BS 8204-6: SR2.
Other requirements: Coving /Skirting/ Upstands As per manufacturer’s
recommendations.
31.3 Preparation Of Substrates
31.3.1 Testing Moisture Content Of Substrates
Drying aids: Remove minimum four days prior to test.
Test: To BS 8203, Annex A using an accurately calibrated hygrometer or
moisture meter.
Location of readings: Corners, along edges, and at various points over the test
area.
Acceptability: Do not lay resin flooring until readings are scrutinised by
manufacturer/approved applicator_
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31.3.2 Surface Hardness Of Substrates
General: Substrates must restrain stresses that occur during setting and
hardening of resin.
Test for surface hardness: To BS EN 12504-2 using a rebound hammer.
Test results: Submit.
Areas of non compliance: Submit remedial proposals.in accordance with
flooring system manufacturer’s recommendations
31.3.3 Preparation Of Substrates Generally
Chases/ Saw cuts: Cut/ break out at skirtings, free edges, movement joints, etc.
for termination of resin flooring.
Blow holes, cavities, cracks, etc: Fill with repair product recommended by resin
flooring Manufacturer.
Cleanliness: Remove surface contaminants, debris, dirt and dust.
Surface texture: Suitable to accept resin flooring and achieve a full bond over
the complete area.
31.3.4 Existing Substrates
Preparation: Captive shot blasting to remove surface imperfections, ingrained
contaminants, coatings and residues.
Contaminated areas: Submit proposals for removal and repair in accordance
with manufacturer’s recommendations
31.4 Laying Flooring
31.4.1 Workmanship
Operatives: Trained/ Experienced in the application of resin floorings.
Evidence of training/ experience: Submit on request.
Fillers and incorporated aggregates: Thoroughly mix in to ensure wetting.
Avoid over-vigorous mixing resulting in excessive air entrainment.
Scattered aggregates: Broadcast onto wet surface of resin.
Appearance: Consistent.
Curing: Allow appropriate periods between coats and before surface treatments
and trafficking/ use.
31.4.2 Control Samples
Complete areas of finished work in the following locations: in advance of the
remainder lay 36sqm samples of each floor type, locations to be approved by
ENGINEER.
Approval of appearance: Obtain before proceeding.
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31.4.3 Primers
Application: Even to completely wet, penetrate and seal substrates.
Coverage per coat:0.15-0.3kgs.m2 as per substrate porosity.
Curing period (maximum): 24 hours at 30-35°C before application of resin
flooring.
31.4.4 Bond Strength Of Resin Flooring
Contact surfaces: Substrate and fully cured resin flooring.
Bond: In accordance with manufacturer's performance data.
Test: To BS 8204-6, clause 11.4 and BS EN 1542.
31.4.5 Resin Skirtings/ Upstands
Quality: Render grade resin.
Colour: As flooring.
Profile: Radius cove.
Top edge of Skirting/ Upstands: Retain with a stop bead.
Transition with resin flooring: Sealant movement joint.
31.4.6 Free Edges Of Resin Flooring
Transition to abutting floor finishes: Straight and smooth.
Retention of resin edges: See termination detyails provided by manufacturer.
31.4.7 Sealant Movement Joints
Selection of product and design as per recommendations of Resin Flooring
system manufacturer .BASF Construction Chemicals UAE LLC ,P O Box
37127, Dubai ,UAE.
Location: Centre over movement joints in substrate.
Preparation and application: As section Z22.
Retention of resin edges:
Joint width: As per design
Sealant: Masterflex 460-as manufactured by BASF Construction Chemicals
UAE LLC.
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32 Anti- Static Vinyl Tiles
32.1 General
32.1.1 Scope of work
The supply and installation of Anti-Static vinyl tiles on raised access flooring
in computer data centres, electrical rooms, utility rooms, all are indicated on
dwgs. and finishes schedule.
32.2 Material
32.2.1 Anti-Static Vinyl tiles
Hard wearing homogeneous anti-static vinyl floor tiles with dissipative
properties, engineered for electro static dissipative (ESD) protection
The flooring shall be Polyflor 2000 SD tiles, as manufactured by Polyflor
Ltd. of Manchester, England or equal approved
The flooring shall be tiles with static dissipative properties in 2.0mm
thickness. It shall be homogeneous and monolayer in construction. The
static dissipative properties must be present throughout the full product
thickness.
The flooring shall conform fully with the requirements of EN 649.
In respect of flame spread, the flooring shall have been fully tested to EN
13501-1 and certified as having Class Bfl-S1, achieving the criteria EN ISO
9239-1 ³8kw/m2 and the mandatory requirement of EN ISO 11925-2 pass. It
shall be tested to ASTM E648 and certified as having passed with a Class 1
rating
With regard to EN 13893 for slip resistance, the flooring shall be classified
DS, making it suitable for use in areas which are predominantly dry, but
with occasional spillage.
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The product must have been fully tested for abrasion resistance to the Frick
Taber test EN 660: Part 2 and be in abrasion group M, as defined in EN 649.
With regard to static dissipative properties, the flooring must conform to the
requirements of IBM specifications. When tested to EN 1081 R1/R2 the
flooring must have a resistance of <109 ohms. When tested to ESD S7.1, the
flooring must have a resistance of between 1x106 to 1x109 ohms.
Tested to BS IEC 61340-4-1 2003 RG, the flooring must have a resistance
between 1x106 to 1x109 ohms.
Polyflor Static Dissipative products are engineered for use where static
control is required. These floor tiles are ideal for use in telecommunications
installations, computer rooms
32.3 Laying Flooring
32.3.1 Workmanship
Access Panel applications require specific fitting instructions, to ensure
product performance and achievement of electrical results outlined by
manufacturer.
The tiles therefore are to be installed strictly in accordance with manufacturer’s
specified adhesive and procedures.
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33 Porcelain Tiles
33.1 General
33.1.1 Scope of work
The supply and installation of non-slip homogeneous Porcelain stoneware fully
vitrified tiles on screed or on raised access floors in areas as indicated on dwgs.
and finishes schedule.
33.2 Material
33.2.1 Porcelain tiles
Tiles to be of size approx. 300x300 as suitable for installing on 600x600
panels of raised access floor panels and for installing on screed.
33.2.2 Samples and literature
Samples and/or literature of proposed adhesive, sealants and grouts to be
submitted to the Engineer for approval.
33.2.3 Shop drawings
Provide detailed shop drawings of the tiling installation for the approval of the
Engineer. Shop drawings are to show the following:
iii. floor plans showing tile layouts, floor gulleys and any other relevant floor
fixtures.
iv. Wall elevations showing tile layouts, mirrors, sanitary fixtures and any other,
relevant wall fixtures.
10.2.1.2 Requirement for Homogeneous Porcelain fully vitrified floor tiles
Water Absorption C373 0.5% Maximum
b. Abrasive Wear C501 100 Minimum
c. Breaking Strength C648 250lbs. Minimum
d. Bond Strength C482 50 psi Minimum
e. Coefficient of Friction-Dry C1028 .6 Minimum
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f. Coefficient of Friction-Wet C1028 .6 Minimum
g. Facial Dimensions (Range) C499 1.5% Maximum
h. Range of Thickness C499 0.040
i. Warpage (Diagonal) C485 +/- 0.75 Maximum
j. Wedging C502 1.00% Maximum
k. Scratch Hardness C373 7/8
All tiles to be submitted for Client approval.
33.2.4 Adhesives
33.2.4.1 Adhesives for floor tiling works
Thin set latex mortar composition adhesive shall be used in accordance with the
following characteristics:
Shear bond 3.5 MPa (500 psi)
Shear bond water immersion 2.3 Mpa (340 psi)
Water absorption 4% max
Compressive strength 34.5 Mpa (500 psi)
TLA service rating extra heavy
Tensile bond (BS 5890) 1575 N (355 lbs)
Shear adhesion (14 days) 22.8 kN95126 lbs)
Coefficient linear thermal expansion 65 x 10-7/(° F)
117 x 10-7/(° F)
All materials to be mixed and applied strictly in accordance with the
manufacturer’s written instructions.
33.2.4.2 Grout Compounds
Grout system shall be epoxy based stainless grout. Grout shall comply with the
following characteristics:
Stainless, pigment free colourfast epoxy grout suitable for floor and wall
installations of ceramic tile, brick and stone.
Tensile strength 17.7 MPa (2577 psi)
Compressive strength 101 Mpa (14700 psi)
Thermal shock resistance 7.6 MPa (1100 psi)
Shrinkage 0.07%
Sag resistance pass
Water cleanability > 80 minutes
The completed system should carry a full warranty from the supplier.
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33.2.4.3 Adhesives for bathroom areas
Adhesive shall be two part latext modified as per manufacturers specification.
33.2.4.4 Grout compounds for bathroom areas
Grout system shall be epoxy based stainless grout as per manufacturer's
specification. The grout shall comply with the following characteristics:
Stainless, pigment free, colour fast epoxy grout suitable for floor and wall
installations.
Tensile strength 11.7 MPa (1700 psi)
Compressive strength 51.7 Mpa (7500 psi)
Thermal shock resistance 7.6 MPa (1100 psi)
Shrinkage 0.19%
Sag resistance pass
Water cleanability > 80 minutes
33.2.5 Joint sealant, back-up strip, performed joint and grout
As recommended by BS 5385.
33.2.6 Cement
Ordinary Portland cement complying with BS 12 or Omani Standard No. OS7.
33.2.7 Sand
Clean sharp sand complying with BS 882 (grading Zone 2 or 3).
33.2.8 Water
Clean potable water shall comply with specification for Concrete Work.
33.2.9 Mortar for floor tiles
Thin-set mortar as specified here in.
33.2.10 Separating membrane
Polythene sheet, 250 microns thick.
33.2.11 Grout
Proprietary grout as recommended by tile manufacturer. Colour to match the
tile and to the approval of the Engineer. The grout shall be water resistant.
33.3 Execution
All as outlined in item 10.3 of Section 10 – Ceramic Tiles.