Implementing Agency (IA)iccoindia.org/wp-content/uploads/2019/11/Final-NIT...IL&FS Clusters as the Technical Agency for Baghara Traditional Dress Making Cluster , Morigaon, Assam under

ICCo INVITATION FOR BID

January 2020 Page 1

Construction works of 1 no Common Facility Building (CFC) & 2 No of village level

Work shed (Spoke) Units including all internal electrification, plumbing & sanitary

installation works at Baghara Panchayat (Gunamora no. 2, Tengaguri & Charaihagi

village) in Morigaon District, Assam under SFURTI Project

Tender No- SFURTI- MSME/ICCo/Civil/2019-20/02

Implementing Agency (IA):

ICCo, Guwahati

Volume I – General Conditions of Contract (GCC)

Nodal Agency (NA): Technical Agency(TA):

Indian Institute of Entrepreneurship, IL & FS Cluster Development Initiative Ltd

Guwahati. New Delhi


January 2020 Page 2

INDEX

S NO DETAILS PAGE NO

1 NOTICE INVITATING TENDER 3-4

2 INSTRUCTIONS TO BIDDERS 5-6

3 TENDER DOCUMENTS 7-11

4 FORMS OF TENDER QUALIFICATION INFORMATION 11-11

5 DECLARATION 12-12

6 CONDITIONS OF CONTRACT

A-GENERAL 13-15

B-TIME OF COMPLETION 15-17

C-QUALITY CONTROLS 17-18

D-COST CONTROLS 18-20

7 PRICE SCHEDULE (I)

8 PRICE SUMMARY 26-27

9 TECHNICAL SPECIFICATIONS 28-28


January 2020 Page 3

Notice Inviting Tender ICCo

ICCo is a registered Organization (Implementing Agency) working in collaboration with IIE, a Nodal Agency and

IL&FS Clusters as the Technical Agency for Baghara Traditional Dress Making Cluster , Morigaon, Assam under the

SFURTI Scheme, Ministry of MSME. The interested parties may submit the sealed quotation affixing court fee stamps

of Rs. 8.25 (Rupees eight and twenty five paise only) in prescribed format from registered contractors (class–IB and

above), registered with APWD/CPWD/Any Other Government Organization for the following works at Baghara Traditional Dress Making Cluster, Morigaon ( Assam).

Tender No - SFURTI- MSME/ICCo/Civil/2019-20/02 Dated 08/01/2020

Brief Description

of the Works

Estimated

value of

works (Rs. in

lakhs)

Earnest

money

(Rs. in

lakhs)

Cost of

Tender

docume

nt (in Rs)

Mode

Payment

of Period of Downloading,

Submission & Opening of

Tender box

Construction works

of 1 no Common

Facility Building

(CFC) & 2 No of

village level Work

shed (Spoke) Units

at Baghara

Panchayat

(Gunamora no. 2,

Tengaguri &

Charaihagi village)

in Morigaon

District, Assam

under SFURTI

Project

45.23 0.9

(Rs

90468/-)

1500/- Demand

Draft- in

favour of

“Baghara

Traditional

Dress Making

Cluster”,

payable at

Guwahati.

Downloading – 8th January,

2020 to 28th January, 2020 up to 24.00 Hours.

Submission - 8th January, 2020

to 28th January, 2020. Up to

13.00 Hours.

Placing & Opening of Tender

box-

Placing: ICCo, Second Floor Above Bandan Bank, A.G

tower, B.N. Saikia Road, Beltola Survey, Guwahati,

781028, Assam.

Opening of Tender: Indian

Institute of Entrepreneurship

(IIE), Guwahati.

Near Games Village, Lalmati,

Guwahati, Assam 781029, on

28th January, 2020 at 15.00

hours by Tender Evaluation Committee.

The detailed tender document can be downloaded from www.iie.gov.in /www.iccoindia.org

Sd/-

(Alay Barah)

Executive Director

Place : Guwahati ICCo

http://www.iie.gov.in/

http://www.iccoindia.org/


January 2020 Page 4

1. The Tender form/bidding document is attached in this document and can be used for the

tender bidding process.

2. Bidders / bidders should submit their bids through Speed post/Currier and Hand delivery in

the address:, ICCo, Second Floor, Above Bandan Bank, A.G tower, B.N. Saikia Road, Beltola

Survey, Guwahati, 781028, Assam.

3. Bidders / bidders are requested to visit the above website regularly. Any

changes/modifications in tender enquiry will be intimated by corrigendum through this

website only.

4. In case, any holiday is declared by the Government on the day of opening, the tenders will be

opened on the next working day at the same time. The ICCo reserves the right to accept or

reject any or all the tenders.

5. All bidder is required to submit Earnest Money (EMD) which is refundable after selection of

lowest bidder, in the form of a Demand Draft issued by a nationalized bank @ 2% of project

cost (Rs 90468/-). The EMD is to be in favour of “Baghara Traditional Dress Making

Cluster” payable at Guwahati.

6. Bidders are required to submit Tender Document Fees Rs 1500/- in the form of a Demand

Draft issued by a nationalized bank. The EMD is to be in favour of “ICCO” payable at New

Delhi. Please note that the tender fees is not refundable

7. Bidders will be required to come or send their authorized representative to attend the bid

opening process at above mentioned Office.

Sd/-

Authorized Signatory

ICCo, Guwahati: 781028


January 2020 Page 5

NOTICE INVITING TENDERS

1. Tenders are invited from eligible and experienced Contractors for the work mentioned below:

1 Name of the work 1.Construction of Cluster level Common Facility

Centre (CFC) building including internal

Electrification, plumbing & sanitary installation.

2. Construction of two Village level Spoke Unit

buildings including internal electrification,

plumbing & sanitary installation

2 Estimate Contract value of work. Rs. 45,23,392/-

3 Period of completion of work 6 months

4 Form of contract / class of firms

eligible,

5 E.M.D to be paid by bidders in the

shape of Demand Draft obtained

from Nationalized Bank only.

Experience in similar type of work in the North

East Region of India (Class-IB & above

contractors)

@ 2% on estimated value, Rs 90468/-

6 Issue of Tender Document Tender documents can be down loaded from the

web site www.iie.gov.in, www.iccoindia.org

7 Last Date and time for submission

of Tenders

8 Date and time of opening of

Tenders.

28th January 2020, 13:00 Hrs

28th January 2020 at 15:00 Hrs at IIE, Ghy

2. ICCo through community has already arranged land required for the construction of the CFC

building and spoke units at proposed locations.

http://www.iie.gov.in/

http://www.iccoindia.org/


January 2020 Page 6

3. Eligible Criteria for Selection of Bidder:

a. Experience in Similar type of Work (Construction of Community Halls, CFC, Work shed,

factory Buildings, Warehouse, etc) in the North East Region

b. At least a single similar work/project of Rs 40 Lakhs or 2 works of Rs 60 Lakhs & above

should have been carried out successfully in past 2 years.

c. Bidders should have an Average Annual Turnover of Rs 1.5 Crore for past 3 financial

years, Audited Balanced Sheets to be attached.

d. Bidders should have a solvency of Rs 37 Lakhs, Bank solvency certificates to be attached.

e. The Bidders should not be blacklisted by any State/Central government or Private

Organization, the bidder should be free from any past litigations, pending court case or

criminal proceedings, an undertaking in this regard has to be submitted, failure to submit

the undertaking shall cancel the bid

f. The bidder should have a GSTIN registration, PAN, IT Return acknowledgement for past

2 years.


January 2020 Page 7

INSTRUCTIONS TO BIDDERS

A – GENERAL

Introduction: ICCo as the Implementing Agency and Indian Institute of Entrepreneurship (IIE) as a

Nodal Agency for the Baghara cluster under the SFRUTI project with an objective to strengthen

traditional industries in terms of productivity, competitiveness and sustainability. In this context, the

construction of Cluster level Common Facility Centre (CFC) & 2 Spoke building including internal

electrification, plumbing & sanitary Installation is to be set up in the target area (Morigaon). The

tender is invited from experienced contractors for the construction of CFC and spoke Unit.

1. Name and scope of works:

Brief details of works as follows:

A Brief description and location of

works

1. Construction of Cluster level Common

Facility Centre (CFC) building at Gunamora

number 2.

2. Construction of two Village level Spoke

Unit buildings at Tengaguri and Charaihagi.

B Scope of works Construction, internal electrification,

plumbing and sanitary installations.

C Period of completion of works 6 months

ICCo, New Delhi has invited tenders from the bidders to be valid for the 6 (six) months from

the date of issue of work order.

The shortlisted bidder quoting the lowest has to furnish a performance security, at the

time of signing of agreement, issued by a nationalized bank in the form of a Bank

Guarantee/FDR @ 10% of quoted amount with a validity of 60 days from the date of

completion of work.

The successful bidder have to complete the works within the specified period of time.

2. Eligible Criteria for Selection of Tender:

Experience in Similar type of Work in the North East Region especially in Assam

At least a single similar work/project has been completed successfully

Bidders should have completed project not less than Rs. 40 lakh

3. Qualification data of the Bidders

The Bidder shall furnish the following particulars in the formats enclosed, supported by

documentary evidence as specified in the formats.

Check slip to accompany the tender.

Proof of documents relating to experience in the similar type of works.


January 2020 Page 8

Even though the Bidders meet the above qualifying criteria, they are liable to be disqualified

/ debarred / suspended / blacklisted if they have

Furnished false / fabricated particulars in the forms, statements and /annexure submitted in

proof of the qualification requirements and/or Not turned up for entering into agreement,

when called upon.

Record of poor progress such as abandoning the work, not properly completing the contract,

inordinate delays in completion, litigation history or financial failures etc. and/or

Even while execution of the work, if found that the work was awarded to the Contractor

based on false / fake certificates of experience, the Contractor will be blacklisted and work

will be taken over invoking relevant standard rules of GOI

If the rate quoted by a Bidder is found to be either abnormally high or within the permissible

ceiling limits prescribed but under collusion or due to unethical practices adopted at the time

of tendering process, such tenders shall be rejected.

A Bidder submitting a Tender which the tender accepting authority considers excessive and

or indicative of insufficient knowledge of current prices or definite attempt of profiteering

will render him liable to be debarred permanently from tendering or for such period as the

tender accepting authority may decide. The Bidder overall quote should be based on the

controlled prices for the materials, if any, fixed by the Government or the reasonable prices

permissible for the Bidder to charge a private purchaser under the provisions of clause-6 of

the hoarding and profiteering prevention ordinance of 1943 as amended from time to time

and on similar principle in regard to labour supervision on the construction.

4. One Tender per Bidder:

Each Bidder shall submit only one Tender for the work. A Bidder who submits more than

one Tender will cause disqualification of all the Tenders submitted by the Bidder.

5. Cost of Tendering

The Bidder shall bear all costs associated with the preparation and submission of his Tender

and the tender inviting authority will in no case be responsible and liable for those costs.

6. Site Visit:

The CFC is to be constructed at the proposed site in Gunamora number 2 (Morigaon). The

two spoke units are to be constructed at Tengaguri and Charaihagi. The bidders may conduct

site visits on their own before submitting their financial quotes


January 2020 Page 9

TENDER DOCUMENT

7. Content of Tender document:

One set of tender document consist of the followings:

7.1.1.Notice Inviting Tenders (NIT)

7.1.2.Instruction to Bidders

7.1.3. Forms of Tender and qualification information

7.1.4.Conditions of Contract.

Specifications.

Drawings.

Forms of Securities. i.e., EMD, Additional Security etc.

Bill of quantities and estimated cost

7.1.9.Bid format.

8. Clarification of Tender:

A prospective Bidder requiring any clarification on Tender documents may contact the in

charge at the address indicated in the N I T . The In charge will also respond to any request

for clarification, received through post or telephone

9. Amendment to Tender Documents.

Before the last date for submission of Tenders, the Tender Inviting Officer may modify any

of the Contents of the Tender Notice, Tender documents by issuing amendment / Addendum.

Any addendum/amendments issued by the Tender Inviting Officer shall be part of the Tender

Document and it shall either be communicated in writing to all the purchasers of the Tender

documents or notified in the Web site/News Papers in which NIT was published.

10. Language of the Tender:

All documents relating to the tender shall be in the English Language only.

11. Documents comprising of the tender:

The bidders are requested to submit a Proposal as detailed in this document.

The bidders, who are desirous of participating in the Tender, shall sign on all the

statements, documents, certificates, tender document purchased by him, owning

responsibility for their correctness/authenticity.

Performance Security: The successful bidder shall submit performance security in the form

of bank guarantee @10% of quoted value as indicated earlier along with the Proposal. If the

successful bidder does not submit the performance security within the stipulated time than

bidder will be disqualified and contract will be awarded to next qualified bidders.

Technical Bid proposal:

In preparing the Technical proposal, bidders are expected to examine the documents

comprising this tender document in detail. Material deficiencies in providing the information

requested may result in rejection of a Proposal.

While preparing the Technical proposal, bidders must give particular attention to the

following:

If a bidder considers that they do not have all the expertise for the Assignment, it may obtain

a full range of expertise by associating with other firms as appropriate.

The Technical Proposal should provide the following information using the attached

Standard Forms, where ever applicable


January 2020 Page 10

A brief description of the bidder/ JV’s organization and an outline of recent experience on

assignments of a similar nature. For each assignment, the outline should indicate, inter alia,

duration of the assignment, contract amount, and bidder/ JV’s involvement.

List of equipment proposed, make, model etc with technical brochures (v) List of personnel

who will be looking after the project execution

Any comments or suggestions on the proposed scope of work, list of services, and any

facilities expected to be provided by the ICCo/Baghara Traditional Dress Making Cluster.

Any additional comments/ remarks.

12. Price Offer:

The Bidder should quote his price offer as per items and quantity in annexure-I tender

amount based on this schedule of quantities. He should quote his offer both in words and

figures. The price offers shall be written both in figures and words legibly and free from

erasures, over writings or corrections of figures. Corrections where unavoidable should be

made by crossing out, and rewriting duly initializing with date.

The bid offer shall be for the whole work.

All statutory duties, taxes, and other levies payable by the contractor as per State/ Central

Government rules, shall be included in the prices quoted by the Bidder.

13. Validity of Tender:

The validity of tender shall be for 180 days

During the above mentioned period no plea by the Bidder for any sort of modification of the

tender based upon or arising out of any alleged misunderstanding or misconceptions or

mistake or for any reason will be entertained.

In exceptional circumstances, prior to expiry of the original time limit, the Tender Inviting

Officer may request the bidders to extend the period of validity for a specified additional

period. Such request to the Bidders shall be made in writing.

14. Signing of Tender:

If the tender is made by an individual, it shall be signed with his full name and his address

shall be given. If it is made by a firm, it shall be signed with the co-partnership name by a

member of the firm, who shall also sign his own name, and the name and address of each

member of the firm shall be given, if the tender is made by a corporation it shall be signed by

a duly authorized officer who shall produce with his tender satisfactory evidence of his

authorization. Such tendering corporation may be required before the contract is executed, to

furnish evidence of its corporate existence. Tenders signed on behalf of G.P.A holder will be

rejected.

The tender shall contain no alterations or additions, except those to comply with instructions

issued by the tender inviting officer, or as necessary to correct errors made by the Bidder, in

which case all such corrections shall be initialed by the person signing the tender.

No alteration which is made by the Bidder in the contract form, the conditions of the contract,

the drawings, specifications or statements / formats or quantities accompanying the same will

be recognized, and, if any such alterations are made the tender will be rejected.

15. Submission of Tender:

The Bidder shall invariably ensure that the following are to be submitted along with tender

document.

Check slip

Copy of Experience Certificate in Similar type of Work.



At least a single similar work not less than Rs.40.00 lakhs value in NER.

Declaration towards the genuineness of the certificates

The successful Bidder shall furnish the original hard copies of all the

documents/EMD/certificates/ statements by them before concluding the agreement.

Submit tenders in as explained above. The tender should be submitted in a water proof

covers and duly sealed. The cover should clearly indicate the Tender Number, Name of work

Tendered, due date for opening, address of the bidder and the Bid schedule.

The successful bidders should submit performance security in the form of bank

guarantee(BG) or Fixed Deposit Receipt (FDR) @ 10% of quoted value before signing the

agreement

The bid should reach the above mention address on or before last date and time of

submission mentioned in NIT.

16. Tender opening and evaluations:

The Bidders or their authorized representatives can be present at the time opening of the

tenders. Either the Bidder himself or one of his representative with proper authorization only

will be allowed at the time of tender opening. If any of the Bidder is not present at the time

of opening of tenders, the tender opening authority will, on opening the tender of the

absentee Bidder, reads out and record the deficiencies if any, which shall be binding on the

Bidder.

The bid containing qualification requirements as per eligible criteria will be evaluated by the

tender opening authority and the minutes are recorded which will be signed by the tender

opening authority as well as Bidders or their authorized representatives present.

17. Bid validity:

The bid validity should be not less than 6 (six) months from the submission of bid.

18. Evaluation and Comparison of bids:

The Committee will evaluate and compare the price of all the qualified Bidders.

Negotiations at any level are strictly prohibited. However, good gesture rebate, if offered by

the lowest Bidder prior to finalization of tenders may be accepted by the tender accepting

authority.

Selection of Bidder among the lowest and equally quoted Bidders will be in the following

orders:

The Bidder whose Technical bid capacity is higher will be selected.

In case the bid capacity is also same the Bidder whose annual turnover is more will be

preferred.

Even if the criteria incidentally become the same, the turnover on similar works and

thereafter machinery available for the work and then the clean track record will be

considered for selection.

19. Process to be confidential:

Information relating to the examination, clarification, evaluation and comparison of tenders

and recommendations for the award of a contract shall not be disclosed to Bidders or any

other persons not officially concerned with such process until the award to the successful

Bidder has been announced by the tender accepting authority. Any effort by a Bidder to

influence the processing of tenders or award decisions may result in the rejection of his

tender.



20. Award of Contract:

The evaluation committee will award or recommend to the competent tender accepting

authority for award of the contract to the Bidder who is found technically qualified as per the

tender conditions and whose price is lowest.

The tender accepting authority reserves the right to accept or reject any tender or all tenders

and to cancel the tendering process, at any time prior to the award of contract, without

thereby incurring any liability to the affected Bidder or Bidders or any obligation to inform

the affected Bidder or Bidders of the reasons for such action.

21. Notification of award and signing of agreement

The Bidder whose Tender has been accepted will be notified of the award of the work prior to

expiration of the Tender validity period by registered letter. This letter (hereinafter and in the

Conditions of Contract called “Letter of Acceptance”) will indicate the sum that the tender

inviting organization will pay the Contractor in consideration of the execution, completion,

and maintenance of the Works by the Contractor as prescribed by the Contract (hereinafter

and in the Contract called the “Contract Amount”).

The successful Bidder has to sign an agreement within a period of 15 days from the date of

receipt of communication of acceptance of his tender. On failure to do so his tender will be

cancelled.

The Scope of work, time of completion, defect liability period and Bank Guarantee will be

made in the agreement between contractor and ICCo.

22. Corrupt or fraudulent practices:

Under the SFURTI scheme requires that the bidders / suppliers / contractors observe the highest

standard of ethics during the procurement and execution of such contracts. In pursuance of this

policy,define for the purposes of the provision, the terms set forth below as follows:

“corrupt practices” means the offering, giving, receiving or soliciting of anything of value to

influence the action of a Government official in procurement process or in contract execution:

and

“fraudulent practice” means a misrepresentation of facts in order to influence a procurement

process or the execution of a contract to the detriment of the Government and includes collusive

practice among Bidders (prior to or after Tender submission) designed to establish in Tender

prices at artificial non- competitive levels and to deprive the Government of the benefits of free

and open competition

Will reject a proposal for award if it determines that the Bidder recommended for award has

engaged in corrupt or fraudulent practices in competing for the contract in question.



FORMS OF TENDER QUALIFICATION INFORMATION CHECKLIST TO ACOMPANY THE TENDER

Sl . No .

Type of

Document

Please Tick

1. The forwarding letter of the tender YES

NO

2. Technical bid document* YES

NO

3. Supporting for technical bid YES

NO

4. Financial Bid document* YES

NO

5. Certificate of registration/proof of

ownership along address* YES

NO

6. Copy of pan card / TIN* YES

NO

7. GST registration/ certificate * YES

NO

8. Income tax and sales tax certificates of

last 2 years

YES

NO

9 Audited statements of last 3 years YES

NO

10 Undertaking that the firm is not

blacklisted by any Government/Private Organization

YES

NO

11 Undertaking that the firm has no pending vigilance/CBI case;

YES

NO

Note:

1. All the statements copies of the certificates, documents etc., enclosed to the Tender Document

shall be given page numbers on the right corner of each certificate, which will be indicated in

column (4) against each item. The statements furnished shall be in the formats appended to

the tender document.

2. The information shall be filled-in by the Bidder in the checklist and shall be enclosed to the

bid for the purposes of verification as well as evaluation of the Bidder’s Compliance to the



qualification criteria as provided in the Tender document. All the Certificates, documents,

statements as per check-list shall be submitted by the Bidder.

3. The bidder shall sign all the statements/documents/certificates received by him owing

responsibility for their correctness/authenticity. The successful Bidder shall furnish the

original hard copies of all the documents / certificates / statements received by them before

concluding the Agreement



DECLARATION

I / WE ………………………………………………………………. have gone through carefully all

the Tender conditions and solemnly declare that the certificates or the documents submitted by me/us

are genuine and I/We will abide by any penal action such as disqualification or black listing or

determination of contract or any other action deemed fit, taken by, the Department against us, if it is

found that the statements, documents, certificates produced by me/us are false/fabricated

I / WE hereby declare that, I / WE have not been blacklisted / debarred / Suspended / demoted in any

departments of Govt. of India or State Governments due to any reasons.

Signature of the Bidder

Seal:



CONDITIONS OF CONTRACT

A-General

1. Interpretation:

In interpreting these Conditions of Contract, singular also means plural, male also means

female, and vice-versa. Headings have no significance. Works have their normal meaning

under the language of the contract unless specifically defined. The In charge will provide

instructions clarifying queries about the conditions of Contract.

The documents forming the Contract shall be interpreted in the following order of priority:

1.2.1.Agreement

1.2.2. Letter of Acceptance, notice to proceed with the works

1.2.3.Contractor’s Tender

1.2.4.Conditions of contract

1.2.5.Specifications

Drawings

Bill of quantities

Any other document listed as forming part of the Contract.

2. Decisions:

Except where otherwise specifically stated, the Director will decide the contractual matters

between the Department and the Contractor in the role representing the Department.

3. Delegation:

The ICCo may delegate any of staffs and responsibilities to other officers.

4. Communications:

Communications between parties, which are referred to in the conditions, are effective only

when in writing. A notice shall be effective only when it is delivered (in terms of Indian

Contract Act)

5. Personal:

The Contractor shall employ the required Key Personnel named in the Schedule of Key

Personnel to carry out the functions stated in the Schedule or other personnel approved by

the Committee. The Committee will approve any proposed replacement of Key Personnel

only if their qualifications, abilities, and relevant experience are substantially equal to or

better than those of the personnel listed in the Schedule.

Failure to employ the required technical personnel by the contractor the following amounts

will be recovered from the contractor over and above the provision made in part two of

schedule-A from the contractors bills.

The technical personnel should be on full time and available at site whenever required by in

charge to take instructions.

The names of the technical personnel to be employed by the contractor should be furnished

in the statement enclosed separately.

If the contractor fails to employ technical personnel the work will be suspended or

department will engage a technical personnel and recover the cost thereof from the contractor

If the Committee asks the Contractor to remove a person who is a member of Contractor’s

staff or his work force stating the reasons the Contractor shall ensure that the person leaves

the site forthwith and has no further connection with the work in the contract.

6. Contractor’s Risks:



All risks of loss of or damage to physical property and of personnel injury and death, which

arise during and in consequence of the performance of the Contract, are the responsibility of

the Contractor.

7. Insurance:

The Contractor shall provide, in the joint names of the Department and the contractor,

insurance cover from the Insurance company Date to the end of the Defects Liability Period

i.e., 12 months after completion for the following events which are due to the Contractor’s

risks.

loss of or damage to the Works, Plant and Materials;

loss of or damage to the Equipment;

loss of or damage of property in connection with the Contract; and

Personal injury or death of persons employed for construction

8. Site Inspections:

The contractor should inspect the site and also proposed quarries of choice for materials

source of water and quote his rate including quarrying, conveyance and all other charges etc.

9. Contractor to Construct the Works:

The Contractor shall construct and Commission the Work in accordance with the

specifications and Drawings.

10. Power Supply:

The contractor will pay the bills of Electricity Department /Sources for the cost of power

consumed by him for construction of CFC and spoke unit in Morigaon.

11. Water Supply:

The contractor will have to arrange for water required for construction & other allied

activities during the period of construction.

12. The works to be Completed by the Intended Completion Date

The Contractor may commence execution of the Works on the Start Date and shall carry

out the Works in accordance with the programme submitted by the Contractor, as

updated with the approval of the in charge, and complete the work by the Intended

Completion Date.

13. Safety:

Contractor is responsible for safety of all activities during the construction.

14. Installation:

At the CFC at Morigaon.

15. Settlement of disputes:

If any dispute of difference of any kind whatsoever arises between the ICCo-IIE and the

Contractor in connection with, or arising out of the Contract, whether during the progress of

the works or after their completion and whether before or after the termination, abandonment

or breach of the Contract, it shall in the first place, be referred to and settled by the

Committee who shall, within a period of thirty days after being requested by the Contractor

to do so, give written notice of his decision to the Contractor. Upon receipt of the written

notice of the decision of the Committee the Contractor shall promptly proceed without delay

to comply with such notice of decision.

If the In charge fails to give notice of his decision in writing within a period of thirty days

after being requested or if the Contractor is dissatisfied with the notice of the decision of the

In charge the Contractor may within thirty days after receiving the notice of decision appeal

to the Department who shall offer an opportunity to the contractor to be heard and to offer

evidence in support of his appeal, the Department shall give notice of his decision



within a period of thirty days after the Contractor has given the said evidence in support of

his appeal, subject to arbitration, as hereinafter provided. Such decision of the ICCo-IIE in

respect of every matter so referred shall be final and binding upon the Contractor and shall

forthwith be given effect to by the Contractor, who shall proceed with the execution of the

works with all due diligence whether he requires arbitration as hereinafter provided, or not. If

the ICCo has given written notice of his decision to the Contractor and no claim to

arbitration, has been communicated to him by the Contractor within a period of thirty days

from receipt of such notice the said decision shall remain final and binding upon the

Contractor. If the ICCo fail to give notice of his decision, as aforesaid within a period of

thirty days after being requested as aforesaid, or if the Contractor be dissatisfied with any

such decision, then and in any such case the contractor within thirty days after the expiration

of the first named period of thirty days as the case may be, require that the matter or matters

in dispute be referred to arbitration: jurisdiction of which is Guwahati, Assam.

B-TIME OF COMPLETION

16. Time of Completion:

The total period of completion is 6 months from the date of receipt of Works order

The attention of the Bidder is directed to the contract requirement at the time of beginning of

the work, the rate of progress and proportionate value of work done from time to time as will

be indicated by the contractor’s Certificate for the value of work done will be required. Date

of commencement of their programme will be the date for concluding agreement but not the

date of handing over site.

After signing the agreement, the contractor shall forthwith begin the work, shall regularly

and continuously proceed with them.

The contractor shall commence the works on site within the period of 6 months after the

receipt of work order by him of a written order to this effect from the concerned authority and

shall proceed with the same with due expedition and without delay, except as may be

expressly sanctioned or ordered.

Delays and extension of time: No claim for compensation on account of delays or hindrances

to the work from any cause whatever shall lie, except as hereafter defined. Reasonable

extension of time will be allowed by the or by the office competent to sanction the

extension, for unavoidable delays, such as may result from causes, which in the opinion of

the , are undoubtedly beyond the control of the contractor. The shall assess the period of

delay or hindrance caused by any written instructions issued by him, at twenty five per cent

in excess or the actual working period so lost. In the event of the failing to issue necessary

instructions and thereby causing delay and hindrance to the contractor, the latter shall have

the right to claim an assessment of such delay by the ICCo, whose decision will be final and

binding. The contractor shall lodge in writing with the statement of claim for any delay or

hindrance. Referred to above, within fourteen days from its commencement, otherwise no

extension of time will be allowed. Whenever authorised alterations or additions made during

the progress of the work are of such a nature in the opinion of the as to justify an extension of

time in consequence thereof, such extension will be granted in writing by or other competent

authority when ordering such alterations or additions.



17. Construction Program:

The Contractor shall furnish within 15 days of the order of the work a programme showing

the sequence in which he proposed to carry out the work, monthly progress expected to be

achieved, also indicating date of procurement of materials plant and machinery. The

schedule should be such that it is practicable to achieve completion of the whole work within

the time limit fixed and shall obtain the approval of the in charge. Further rate of the progress

as in the program shall be kept up to date. In case it is subsequently found necessary to alter

this program, the contractor shall submit sufficiently in advance the revised program

incorporating necessary modifications and get the same approved by the Committee. No

revised program shall be operative without approval of in charge.

The ICCo shall have all times the right, without any way violating this contract, or forming

grounds for any claim, to alter the order of progress of the works or any part thereof and the

contractor shall after receiving such directions proceed in the order directed. The contractor

shall also report the progress to the ICCo, within 7 days of the in charge direction to alter the

order of progress of works.

The Contractor shall give written notice to the in charge whenever planning or progress of

the works is likely to be delayed or disrupted unless any further drawings or order including

a direction, instruction or approval is issued by the in charge within a reasonable time. The

notice shall include details of the drawing or order required and of why and by when it is

required and of any delay or disruption likely to be suffered if it is late.

18. Speed of Work

The Contractor shall at all times maintain the progress of work to conform to the latest

operative progress schedule approved by the in charge. The contractor should furnish

progress report indicating the programme and progress once in a month. The In charge may

at any time in writing direct the contractor to slow down any part or whole of the work for

any reason (which shall not be questioned) whatsoever, and the contractor shall comply with

such orders of the In charge. The compliance of such orders shall not entitle the contractor to

any claim of compensation. Such orders of the in charge for slowing down the work will

however be duly taken into account while granting extension of time if asked by the

contractor for which no extra payment will be entertained.

Delays in Commencement or progress or neglect of work and forfeiture of earnest

money, Security deposit and withheld amounts: If, at any time, the In charge shall be of the

opinion that the Contractor is delaying Commencement of the work or violating any of the

provisions of the Contractor is neglecting or delaying the progress of the work as defined by

the tabular statement. “Rate of progress” in the Articles of Agreement”, he shall so advise

the Contractors in writing and at the same time demand compliance in accordance with

conditions of Tender notice. If the Contractor neglects to comply with such demand within

seven days after receipt of such notice, it shall then or at any time thereafter, be lawful for the

ICCo, to take suitable action in accordance with relevant Clauses.

19. Suspension of works by the Contractor:

If the Contractor shall suspend the works, or sublet the work without sanction of the In

charge, or in the opinion of the In charge shall neglect or fail to proceed with due diligence

in the performance of his part of the Contract as laid down in the Schedule rate of



progress, or if he shall continue to default or repeat such default in the respects mentioned in

relevant rules of GOI, In charge shall take action in accordance with related Clauses.

If the Contractor stops work for 28 days continuously and the Stoppage has not been

authorised by the in charge the Contract will be terminated as per the law.

If the Contractor has delayed the completion of works the Contract will be terminated under

relevant Clauses.

20. Extension of the Intended Completion Date:

The In charge shall extend or recommend for extension, in accordance with the Government

orders in force, the Intended Completion Date if a Variation is issued which makes it

impossible for Completion to be achieved by the Intended Completion Date.

The In charge shall decide whether and by how much to extend the Intended Completion

Date within 21 days of the Contractor asking the Engineer for a decision upon the effect of a

Variation and submitting full supporting information. If the Contractor has failed to give

early warning of a delay or has failed to cooperate in dealing with a delay, the delay by this

failure shall not be considered in assessing the new Intended Completion Date.

21. Early Warning:

The contractor is to warn the in charge at the earliest opportunity of specific likely future

events or circumstances that may adversely affect the Execution of Works.

The Contractor shall cooperate with the In charge in making and considering proposals for

how the effect of such an event or circumstance can be avoided or reduced by anyone

involved in the work and in carrying out any resulting instruction of the In charge.

22. Management Meeting:

The In charge may require the Contractor to attend a management meeting. The business of a

management meeting shall be to review the programme for remaining work and to deal with

matters raised in accordance with the early warning procedure.



23. Identifying defect:

C-QUALITY CONTROLS

23.1. The In charge shall check the Contractor’s work and notify the Contractor of any

Defects that are found. Such checking shall not affect the Contractor’s responsibilities. The

In charge may instruct the Contractor to verify the Defect and to uncover and test any work

that the Engineer considers may be a Defect.

24. Test:

If the In charge instructs the Contractor to carry out a test not specified in the

Specification to check whether any work has a Defect and the Contractor shall pay for the

test and any samples.

25. Corrections of defect:

The In charge shall give notice to the Contractor of any Defects before the end of the Defects

Liability Period, which begins on Completion. The defects liability period shall be

extended for as long as defects remain to be corrected by the Contractor.

Every time notice of a Defect is given, the Contractor shall correct the notified defect within

the length of time specified by the In charge’s notice.

If the contractor has not corrected the defect within the time specified in the In

charge’s notice, the In charge will assess the cost of having the defect corrected and the

contractor will pay this amount.

D-COST CONTROLS 26. Cost controls:

The cost of items quoted by contractors remains same for the period of completion of work,

unless or otherwise specified by ICCo

27. Payments:

The payment terms of conditions of the contract will as under:

Payment stages for CFC will be made as per the prescribed SOP.

First installment: 40% of the value of project cost as advance after signing of the contract

agreement and against submission of Bank guarantee for equivalent amount from any

Nationalized Bank. (The mobilization advance will be deducted proportionately against the

bills and the Bank guarantee will be returned after recovery of the total advance).

Second installment: 40% of the value of the project costs.

20% Balance payment will be released after completion of work against Performance Bank

Guarantee valid for 6 months for equivalent amount from any Nationalized Bank or payment

will be retained till end of 6 month period from completion.

Payment for the work done by the contractor will be made as above for the finished work

based on the Physical verification by the Committee of ICCo-IIE-IL&FS CDI

Payments and Certificates:



Payments shall be adjusted for recovery of advance payments, liquidated damages in terms

of tender conditions and security deposit for the due fulfillment of the contract. Payment will

be made to the Contractor as mentioned in Para 27.1under the certificate to be issued at

intervals as per the payment certificates, and intermediate payment will be the upto a sum

equal to 90 % of the value of work done as so certified and balance of 10 % will be withheld

and retained as security deposit. The amount withheld from the final bill will be retained

under deposits and paid to the contractor after a period of 6 months as all defects shall have

been made good according to the true intent and meaning thereof.

In case of over payments or wrong payment if any made to the contractor due to wrong

interpretation of the provisions of the contract and contract conditions etc., such

unauthorized payment will be deducted in the subsequent bills or final bill for the work or

from the bills under any other contracts with the Government or at any time thereafter from

the deposits available with the ICCo

Any recovery or recoveries advised by the ICCo due to non-fulfillment of any contract

entered into with them by the contractor shall be recovered from any bill or deposits of the

contractor.

The contractor is not eligible for any compensation for inevitable delay in handing over the

site or for any other reason. In such case, suitable extensions of time will be granted after

considering the merits of the case.

Intermediate payment:

For intermediate Stage of work, only part rates as fixed by the Committee will be paid.

Part rates shall be worked out for the work done portion based on the actual operations

involved keeping in view the value of the balance work to be done, to avoid unintended

benefit to the Contractor in initial Stage.

Full rate shall be paid when the work is completed to the full profile as noted in the

drawings.

28. Certificate of Completion of works:

Certificate of completion works:

When the whole of the work has been completed and has satisfactory passed any final test

that may be prescribed by the Contract, the Contractor may give a notice to that effect to the

In charge accompanied by an undertaking to carry out any rectification work during the

period of maintenance, such notice and undertaking shall be in writing and shall be deemed

to be request by the Contractor for the In charge to issue a Certificate of completion in

respect of the Works. The In charge shall, within twenty one days of the date of delivery of

such notice either issue to the Contractor, a certificate of completion stating the date on

which, in his opinion, the works were completed in accordance with the Contract or give

instructions in writing to the Contractor specifying all the Works which, in the In charge'’

opinion, required to be done by the Contractor before the issue of such Certificate.



29. Taxes included in the Price:

The rates quoted by the contractor shall be deemed to be inclusive of the Goods and Services

Tax (GST) and other taxes on all materials that the contractor will have to purchase for

performance of this contract.

Any Central or State taxes on completed items of works of this contract as may be levied

and paid by the contractor shall be reimbursed by the contractor.

30. PAN and GST:

Contractor must have PAN Number and GST Number as per GOI norms.

31. Termination:

The ICCo may terminate the Contract if the contractor causes a fundamental breach of the

Contract.

Fundamental breaches of Contract include, but shall not be limited to the following.

The Contractor stops work for 28 days when no stoppage of work is shown on the current

program and the stoppage has not been authorized by the In charge.

The Contractor is made bankrupt or goes into liquidation other than for a reconstruction or

amalgamation.

The In charge gives Notice that failure to correct a particular Defect is a fundamental breach

of Contract and the Contractor fails to correct it within a reasonable period of time

determined by the In charge; and

The Contractor does not maintain a security which is required and

The Contractor has delayed the completion of works by the number of days for which the

maximum amount of liquidated damages can be paid as defined.

If the contractor, in the judgment of the ICCo has engaged in corrupt or fraudulent practices

in competing for or in the executing the contract.

32. Payment upon Termination:

If the Contract is terminated because of a fundamental breach of Contract by the Contractor,

the In charge shall issue a certificate for the value of the work done less advance payments

received upon the date of the issue of the certificate, less other recoveries due in terms of the

Contract, less taxes due to be deducted at source as per applicable law and less the rate to

apply to the work not completed.. If the total amount due to the ICCo exceeds any payment

due to the Contractor the difference shall be a debt payable to the ICCo

33. Release from Performance:

If the Contract is frustrated by the outbreak of war or by any other event entirely outside the

control of either the Department or the Contractor the In charge shall certify that the contract

has been frustrated. The Contractor shall make the site safe and stop work as quickly as

possible after receiving this certificate and shall be paid for all works carried out before

receiving it and for any work carried out after wards to which commitment was made.

34. Plant and Equipment:

The contractor shall have sufficient plant, equipment and labour and shall work such hours

and shifts as may be necessary to maintain the progress on the work as per the approval

progress schedule. The working and shifts hours shall comply with the Govt. Regulations in

force.

35. Payment upon termination:

If the contract is terminated because of a fundamental breach of contract by the contractor,

the In-charge shall issue a certificate for the value of the work done less advance payment

received upon the date of the issue of the certificate and less the rate to apply to the



work not completed as indicated in the contract data. Additional liquidated damages shall not

apply. If the total amount due to the ICCo exceeds any payment due to the contractor the

difference shall be a debt payable to the ICCo. In case of default for payment within 28 days

from the date of issue of notice to the above effect, the contractor shall be liable to pay

interest at 12% per annum for the period of delay.



To,

ICCo,

Guwahati,

PRICE SCHEDULE (I) PRICE SCHEDULE OF CONTRACT

Sir,

I/We do hereby tender and if this tender is accepted, undertake to execute the following work viz:

Construction of Cluster level Common Facility Centre (CFC) & 2 Spoke units building including

internal electrification, plumbing & sanitary Installation.

I/We have studied the scope of work, including item wise specifications, with unit rates and agree

to execute the work, when the lump sum payment under the terms of the agreement is varied by

payment on measurement quantities.

I/We certify that I/We have inspected the site of the work before quoting my rate excess or less on

ECV; I/We have satisfied about the quality, availability and transport facilities for all the

materials. I/We undertake to execute the work indicated in price schedules of this tender at the

rates quoted below:

S NO DESCRIPTION PRICE IN NUMBER PRICE IN WORDS

1

I/We hereby distinctly and expressly, declare that the rates quoted by us are inclusive of all taxes

and duties, prevailing at the time of execution of work. Further,

I/We declare that I/We will not claim any price escalation or extra compensation on this account.

I/We agreed to keep the offer in this tender valid for a period of 6 (Six) Months mentioned in

Tender Notice and not to modify the whole or any part of it for any reason within above period. If

the tender is withdrawn by me / us for any reasons whatsoever, the earnest money deposit (EMD)

paid by me / us will be forfeited to the Government.

IF MY / OUR tender is not accepted the sum shall be returned to me/us on application when

intimation is sent to me/us of rejection or at the expiration of three months from last date of

receipt of this tender, whichever is earlier. If my/our tender is accepted the earnest money shall be

retained by the Government as security for the due fulfillment of this contract. If upon written

intimation to me/us by the Office,

I/We fail to attend the said office on the date herein fixed or if upon intimation being given to

me/us or acceptance of my/our tender, and if I/We fail to make the additional security deposit or

to enter into the required agreement as defined in the tender notice, then

I/We agree the forfeiture of the earnest money. Any notice required to be served on me/us here

under shall be sufficiently served on me/us if delivered to me/us hereunder shall be sufficiently

served on me/us if delivered to me/us personally or forwarded to me/us by post to (registered or



ordinary) or left at my/our address given herein. Such notice shall if sent by post be deemed to

have been served on me/us at the time when in due course of post it would be delivered at the

address to which it is sent.

I/WE fully understand that the written agreement to be entered into between me/us and

Government shall be the foundation of the rights of the both the parties and the contract shall not

be deemed to be complete until the agreement has first been signed by me/us and then by the

proper officer authorized to enter into contract on behalf of Government. The bid form of the

tender is duly signed by the authorized signatory of the Firm/company and sealed in presence of

the following witness.

Address of the Bidder:

------------------------------- ----

--------------------------- ----------

--------------------------------------

Telephone No:------------

Fax No: -------------------

WITNESS:

1.

2

(Signature of Tender)



PRICE SUMMARY

Description of Work Quoted Value in Rupees Quoted Value in words

Construction works of 1 no Common

Facility Building (CFC) & 2 No of

village level Workshed (Spoke) Units

at Panchayat (Gunamora no. 2,

Tengaguri & Charaihagi village) in

Morigaon District, Assam under

SFURTI Project



Construction works of 1 no Common Facility Building (CFC) & 2 No of village level

Workshed (Spoke) Units including all internal electrification, plumbing & sanitary

installation works at Baghara Panchayat (Gunamora no. 2, Tengaguri & Charaihagi

Village in Morigaon District, Assam under SFURTI Project



ICCo, Guwahati

Volume II – Technical Specifications



Guwahati. New Delhi



TECHNICAL SPECIFICATIONS

CONTENTS

CHAPTER 1: CARRIAGE OF MATERIALS.

CHAPTER 2: EARTH WORK.

CHAPTER 3: PLAIN CEMENT CONCRETE WORK.

CHAPTER 4: BRICK WORKS

CHAPTER 5: BUILDING WORKS



INTRODUCTION

These Specifications contain guidelines and directions to be followed jointly and severally in

the implementation of the subject project to deliver a quality product.

These specifications have been prepared with regard being given to the Central PWD and the

various states P.W.D. Specifications and, in the absence of specific requirements herein, the

relevant provisions in the above documents shall apply.

This document comprises of two parts – (I) General Specifications and (ii) Special

Specifications. The former deals with various works that is commonly relevant to construction

projects while the latter deals with the items of particular application.

The Special Specifications are intended to supplement the General Specifications. In case of

any non-coherence, differences, deviations or discrepancies between the two the special

Specifications will take precedence.

Rates provided in the bid document or the rates quoted by the Contractor for all items of

works while submitting the tender will be deemed to include cost of all materials, taxes,

duties, levies, octroi etc., cost of all labor, all protection works to the site as well as portions

and premises of works in progress, arrangements and related works to ensure safety to the

site, personnel and materials and all other inputs involved in the execution of the items.

The Engineer will be the authority to interpret or clarify the provisions of these specifications

and the outcome shall be made known to the Contractor, in writing. Interpretations/

clarifications once issued will be final as far as the particular contractual works are concerned.

Any Indian Standard/ International Standard/ manual referred to in the Specifications shall

mean the latest revision/edition of the standard/Manual with all additions and amendments

issued thereto.



Chapter 1

CARRIAGE OF MATERIALS

1. General

2. Responsibility For Loss or Damage

3. Lead

4. Stacking

5. Measurements



Chapter 1

CARRIAGE OF MATERIALS -

1. GENERAL

The carriage and stacking of materials shall be amending as directed by the Engineer. All

tools and plants required for the work will be considered as covered by the cost of the work

and shall be arranged by the Contractor. The carriage of materials includes loading, unloading

and stacking including all leads.

2. RESPONSIBILITY FOR LOSS OR DAMAGE

Loading, carriage, unloading and stacking shall be done carefully to avoid loss or damage to

the materials. Mode of carriage depending upon the feasibility and economy, the Officer-In-

Charge shall determine the mode of carriage viz. whether by mechanical or animal transport

or manual labor.

3. LEAD

All distances shall be measured over the shortest practical route and not necessarily the route

actually taken. Carriage by mechanical transport shall be reckoned in one km unit. Distances

of 0.5 km or more shall be taken as 1 km and distance of less than 0.5 km shall be ignored.

However, when the total lead is less than 0.5 km., it will not be ignored but paid for separately

in successive stages of 50 meters subject to the condition that the rate worked on this basis

does not exceed the rate for initial lead of 1 km by mechanical transport.

4. STACKING

Material shall be stacked as directed by the Engineer in such a manner as to ensure the

preservation of their quality and fitness for the work. Different types of materials shall be

stacked separately and in such a way that counting and measurements can be done without

disturbing the stacks.

5. MEASUREMENTS

Length, breadth and height of stacks shall be measured correct to a cm. The quantity shall be

worked out in cubic meter correct to two places of decimal. The volume of stacks shall be

reduced by percentages as shown against each for looseness in stacking to arrive at the net

quantity for payment. No reduction shall be made in respect of articles or materials for which

mode of payment is by length or weight or number



Chapter -2

Earth Work

In loose stacks such as cart loads, lorry loads, etc. - 20%

In fills consolidated by light mechanical machinery -10%

In fills consolidated by heavy mechanical machinery but not under OMC (Optimum Moisture Content)

- 5%.

In fills consolidated by heavy mechanical machinery at OMC - Nil.

Consolidated fills in confined situation such as under floors, etc. - Nil.

Manure or sludge - 8%.

Moore, building rubbishes Lime and sand -Nil.

Stone metal, 40 mm nominal size and above -7.5%.

Coarse aggregate / stone metal below 40 mm nominal size - Nil.

Soling Stone/Boulder 100 mm and above -15%.

Excavated rocks - 50%.

RATE

The rate for carriage of materials is inclusive of all the operations described above.



Chapter 3

PLAIN CEMENT CONCRETE WORK

Material

Water, Cement and Fine Aggregate

Coarse Aggregate

Cement Concrete

Grades of Cement Concrete

Workability of Concrete

Mix Design

Preparation prior to concrete placement, final inspection and approval

Formwork

Mixing

Transportation

Procedure for placing of concrete

Compaction

Curing and Finishing

Preparation of ground for receiving foundations

Inspection

Clean-up

Underwater Concreting

Measurements



Chapter 3

PLAIN CEMENT CONCRETE WORK-

LIST OF BUREAU OF INDIAN STANDARD CODES

1 IS 383 Specification for coarse and fine aggregate from Natural Source for

Concrete

2 IS 456 Code of practice for plain and reinforced concrete

3 IS 516 Method of test for strength of concrete

4 IS 1199 Method of sampling and analysis of concrete

5 IS 1200 (Part II) Method of measurement of building and civil engineering work (Concrete

work)

6 IS 1322 Specification for bitumen fleet for water proofing and damp Proofing

7 IS 1791 Specification for batch type concrete mixers

8 IS 2386 Method of test for aggregate for concrete work

Part I Particle size and shape

Part II Estimation of deleterious materials and organic impurities

Part III Specific gravity, density, voids absorption and bulking

Part IV Mechanical properties

9 IS 2645 Specification for integral cement water proofing components

10 IS 4656 Specification for form vibrators for concrete

11 IS 7861 Code of practice for extreme weather concreting (Part I) recommended

practice for hot weather concreting

12 IS 7861 (Part II) For cold weather concreting

13 IS 9103 For admixtures for concrete

14 IS 10262 Recommended guidelines for concrete mix designs

MATERIAL

Concrete shall consist of a mixture of cement, water and aggregates. Admixtures shall be used

only with prior approval of the Engineer. In such cases admixtures shall be used strictly in



accordance with the manufacturer’s instructions, when approved by the Engineer. Concrete

may be plain or be reinforced with steel.

Water, Cement and Fine aggregate

Water, cement and fine aggregate or sand shall be as specified in Chapter 6 – Building works.

Coarse Aggregate

General: Aggregate most of which is retained on 4.75mm IS Sieve and contains only as much

fine material as is permitted in IS 383 for various sizes and grading is known as coarse

aggregate. Coarse Aggregate shall be crushed stone or gravel and it shall be obtained from

approved/authorized sources.

It shall consist of naturally occurring (uncrushed, crushed or broken) stones. It shall conform

to IS: 383 unless otherwise specified. It shall be free from elongated, flaky or laminated

pieces, adhering coatings, clay lumps, coal residue, clinkers, slag, mica or other deleterious

matter.

Size and Grading:

(I) Stone aggregate and gravel: It shall be either graded or single sized as specified. Normal size

and grading shall be as under:-

(a) Nominal sizes of graded stone aggregate or gravel shall be 40, 20, 16, or 12.5mm as specified.

For any one of the nominal sizes, the proportion of other sizes shall be in accordance with

Table 3.1.

TABLE 3.1

Graded Stone Aggregate or Gravel

IS Sieve Designation Percentage passing (by weight) for nominal size of

40mm 20mm 16mm 12.5mm

75mm 100 - - -

37.5mm 95 to 100 100 - -

19mm 30 to 70 95 to 100 100 -

16mm - - 95 to 100 100

11.2mm - - - 90 to 100

9.5mm 10 to 35 25 to 55 30 to 70 40 to 85

4.75mm 0 to 5 0 to 10 0 to 10 0 to 10



The maximum size of coarse aggregate shall be as large as possible but not greater than 1/4 of

the minimum thickness of concrete member provided that in case of R.C.C. the size presents

no difficulty to surround the reinforcement thoroughly and fill up the corners properly. In

plain cement concrete, the maximum size may be 80mm subject to above limitations in

absence of any special provisions. For heavily reinforced beams the maximum size shall be

restricted to 5 mm less than minimum lateral distance between the bars. Generally for R.C.C.

works 20 mm nominal size of aggregate shall be satisfactory. Aggregates will be tested before

and after concrete mix is established and whenever character or source of material is changed.

Tests will include a sieve analysis to determine conformity with limits of gradation.

1. Samples of aggregates 5 Kg in weight will be taken by the Contractor at source of supply and

submitted to the Engineer before placing orders. These samples if approved shall remain

preserved in the Engineer's care for reference and the type of aggregate used in the works

shall not be altered without the Engineer's prior approval.

2. Aggregates shall be obtained from an approved source and shall conform to the requirements

of IS: 383. For fine aggregate grading in table of IS: 383: shall be applicable. Aggregates shall

not be flaky or elongated particles, defined as particles having a maximum dimension greater

than five times the minimum dimension. Aggregate shall have a water absorption not

exceeding two percent when tested in accordance with IS.

3. The Contractor shall sample and carryout analysis in the presence of the Engineer's

representative, of the fine aggregate and each nominal size of coarse aggregate in use

employing the methods described in IS: 383 and 2386 at least once in each week when

concreting is in progress and at such more frequent intervals as the Engineer may require. The

grading of all aggregates shall be within the respective limits specified in the codes and if,

aggregates vary more than the stipulations in the IS on Fineness Modulus, the Engineer may

instruct the Contractor to alter the relative proportions of the aggregates in the mix to allow

for such difference, or may require further trial mixes.

4. Storage of aggregates shall be provided at each point where concrete is made such that each

nominal size of coarse aggregate and the fine aggregate shall be kept separated at all times.

Contamination of the aggregates by the ground or other foreign matter shall be effectively

prevented at all times, and each heap of aggregate shall be capable of draining freely. The

Contractor shall ensure that graded coarse aggregates are dumped, stockpiled and removed

from stockpiles in a manner that does not cause segregation.

5. Wet fine aggregate shall not be used until, in the opinion of the Engineer, it has drained to

constant and uniform moisture content, unless the Contractor with the knowledge of the

Engineer measures the moisture content of fine aggregate and adds water in each batch of

concrete mixed to allow for the water contained in the fine aggregate.

Stacking: Aggregate shall be stacked on a hard, dry and level patch of ground. When

stockpiling, the aggregate shall not form pyramids resulting in segregation of different sized

materials. It shall be stacked separately according to nominal size of coarse aggregates.

Stacking shall be done in regular stacks, of height not exceeding 100cm.

Testing: Coarse aggregate shall be tested as per IS: 2386



Measurements: For measurement in terms of stacks, aggregates shall be measured in stacks

and paid for after making a deduction of 7.5% of the gross measurements of stacks in respect

of aggregates of nominal size 40mm and above. No deduction from the gross measurements

of the stacks is to be made in respect of aggregates of nominal size below 40mm.

Chemical Admixtures: When required, admixtures of approved quality shall be mixed with

concrete, as specified. The admixtures shall conform to IS: 9103. Manufacturer’s instructions

should be scrupulously followed for adding chemical admixture.

Water stop:

Water stop shall be PVC 200 mm wide conforming to CWPD and BARC specifications to

make construction joints and expansion joint watertight.

Water stop installation along the joints shall be done by embedding one half of the water stop

in each side of the joint between the adjacent sections of the concrete as per manufacturer's

specifications and direction of the Engineer. Water stops shall be properly aligned and placed

in position during embedding. To achieve continuity of water stop along the joint, at crossing

and at change of alignment the water stops shall be welded as per manufacturer's specification

and direction of Engineer.

CEMENT CONCRETE

Grades of Cement Concrete

The concrete shall be in grade designated as under:

Table 3.2: Grades of Concrete

Group Grade

Designation

Specified

Characteristic

Compressive

Strength of 150

mm Cube at 28

Days in N/mm2

Ordinary

Concrete

M10 10

M15 15

M20 20

Standard

Concrete

M25 25

M30 30



M35 35

M40 40

M45 45

M50 50

M55 55

High

Strength

Concrete

M60 60

M65 65

M70 70

M75 75

M80 80

NOTES:

In the designation of concrete mix the letter M refers to the mix and the suffixed number to

the specified compressive strength of 150mm size cube at 28 days, expressed in N/mm2.

For concrete of compressive strength greater than M55, design parameters given in the

standard may not be applicable and the values may be obtained from specialized literatures

and experimental results.

The characteristic strength is defined as the strength of material below which not more than 5

percent of the test results are expected to fail. Table3.3: Minimum Cement Content,

Maximum Water-Cement Ratio and Minimum Grade of Concrete for Different Exposures

with

Normal Weight Aggregates of 20mm Nominal Maximum Size



Group Grade

Designation

Specified

Characteristic

Compressive

Strength of 150

mm Cube at 28

Days in N/mm2

Ordinary

Concrete

M10 10

M15 15

M20 20

Standard

Concrete

M25 25

M30 30

M35 35

M40 40

M45 45

M50 50

M55 55

High

Strength

Concrete

M60 60

M65 65

M70 70

M75 75

M80 80

NOTES:

Cement content prescribed in this table is irrespective of the grades of cement. The additions

such as fly ash or ground granulated blast furnace slag may be taken into account in the

concrete composition with respect to the cement content and water-cement ratio if the

suitability is established and as long as the maximum amounts taken into account do not

exceed the limit of pozzolona and slag specified in IS 1489 (Part 1) and IS 455 respectively.

Minimum grade for plain concrete under mild exposure condition is not specified. The above

minimum cement content and maximum water cement ratio apply only to 20mm nominal

maximum size aggregate. For other sizes of aggregates, these should be changed as per Table



6 of IS 456:2000. The minimum grade of concrete for plain and reinforced concrete shall be

as per Table3.2

1.2.1.2 Concrete of grades lower than those given in Table 3.2 may be used for plain concrete

constructions.

Workability of Concrete

Concrete shall be of a consistency and workability suitable for the conditions of the job. After

the amount of water required is determined, the consistency of the mix shall be maintained

throughout the progress of the corresponding parts of the work and approved tests e.g. slump

tests, compacting factory tests, in accordance with IS. 1199, shall be conducted from time to

time o ensure the maintenance of such consistency.

The concrete mix proportion chosen should be such that the concrete is of adequate

workability for the placing conditions of the concrete and can properly be compacted with the

means available. Suggested ranges of workability of concrete measured in accordance with IS

1199 are given below:

Placing Conditions Degree of

Workability

Slump

(mm)

Blinding concrete;

Very low

See 3.2.2.2 Shallow sections;

Pavement s using pavers

Mass concrete;

Low

25-75

Lightly reinforced sections

in slabs, beams, walls,

columns;

Floors;

Hand placed pavements;

Canal lining;

Strip footings

Heavily reinforced sections

in slabs;

Medium

50-100

Beams, walls, columns;

Slip form work;

Medium

75-100

Pumped concrete



Trench fill;

High

100-150

In-situ piling

Tremie concrete Very high

See

3.2.2.3.

NOTE – For most of the placing conditions, internal vibrators (needle vibrators) are suitable. The

diameter of the needle shall be determined based on the density and spacing of reinforcement

bars and thickness of sections. For termite concrete, vibrators are not required to be used (see

also 3.2.9)

In the ‘very low’ category of workability where strict control is necessary, for example,

pavement quality concrete, measurement of workability by determination of compacting

factor will be more appropriate than slump (see IS 1199) and a value of compacting factor of

0.75 to 0.80 is suggested.

In the ‘very high’ category of workability, measurement of workability by determination of

flow will be appropriate (see IS: 9103)

Table 3.4 gives a range of slumps which shall generally be used for various types of

construction unless otherwise instructed by the Engineer:

Table 3.4: Slump of Concrete for Various Types of construction

SLUMP (in mm) FOR VARIOUS TYPES OF CONSTRUCTION

Maximum

(mm)

Minimum

(mm)

Reinforced foundation walls and footings 75 25

Plain footings and substructure walls 75 25

Slabs, Beams, and reinforced walls 100 25

Building columns 100 25

Pavements 50 25

Heavy mass construction 50 25

Table 3.5: Proportions for Nominal Mix Concrete



Grade of

Concrete

Total Quantity of Dry

Aggregates by Mass per

50Kg of Cement. To be taken

as the Sum of the Individual

Masses of Fine and Coarse

Aggregates, Kg, Max

Proportion of Fine

Aggregate to

Coarse Aggregate

(by Mass)

Quantity of W

per 50kg

Cement, Max

ater

of

M5 800 60

M7.5 625 Generally 1:2 but 45

subject to an upper

limit of 1:1.5 and a

M10 480 34

lower limit of 1:2.5

M15 330 32

M20 250 30

1.2.2 Mix Design :

Mix design is normally a prerequisite to any concreting job and will be required on all major

works. If required by the Contract Documents, an approved testing laboratory shall, at the

contractor's expense, design a mix for each class of concrete and shall submit full details of

the mix designs to the Engineer for his approval. The Engineer's representative and the

Contractor shall clearly code each approved mix with a number and date, and file all details

for identifying and reproducing exactly the same mix.

General:

Each mix design shall be such that the aggregate shall comprise fine aggregate and coarse

aggregate of the size specified and the combined aggregate grading shall be continuous.

Aggregate shall be calculated by weight, and batching procedures shall be established. The

cement content by weight shall not be outside the minimum and maximum limits calculated

from the minimum and maximum dry aggregate to cement ratios specified. The mixes shall be

designed to produce an average concrete strength at twenty-eight days after manufacture not

less than trial mix test strength specified. The water/cement ratio shall be in the region of 0.45

to 0.55 and shall not exceed 0.60.

Preliminary Mix:

The proportions of cement, aggregate and water determined by the Contractor in his mix

design shall be preliminary mix of concrete made and tested for strength and workability

under laboratory conditions observing the appropriate requirements. These preliminary mixes

shall be repeated for adjusted proportions as necessary until concrete mixes meeting

requirements of the preliminary and trial mix tests specified with the workability defined

herein have been produced. If at the time of construction of the works, the source of cement

and or aggregates is changed, or the grading of the aggregate is altered, further preliminary

mixes shall be undertaken.

Trial:



After the Engineer's approval the preliminary concrete design for each class of concrete and

during or following carrying out of the preliminary tests the Contractor shall prepare a trial

mix of each class in the presence of the Engineer. The mixes shall be mixed for the same time

and handled by means of same plant that the Contractor proposes to use in the works.

Proportion of cement, aggregates and water shall be carefully determined by weight in

accordance with the approved mix (or modified mix design after preliminary tests) and sieve

analysis shall be made, by approved methods of the fine aggregate and nominal size of coarse

aggregate used.

Water:

Water for mixing concrete, mortar or grout shall satisfy the recommendations of IS: 456. If

required to do so by Engineer, the Contractor shall take samples of water and test them for

quality.

Admixtures:

Admixtures shall mean material added to concrete materials during mixing for the purpose of

altering properties of normal concrete mixes. If the Contractor wishes to use admixtures,

otherwise than as expressly ordered by Engineer, he shall first obtain the Engineer's written

permission. The methods of use and the quantities of admixture used shall be subject to the

Engineer's approval, which approval shall in no way limit the Contractor's obligations under

the contract to produce concrete with the specified strength and workability. Concrete of any

class containing an admixture shall be separately designed and have separate preliminary tests

and trial mixes and tested for approval by the Engineer as if it were a separate class of

concrete.

Waiver of Mix Design and Weigh Batching:

On certain works the Engineer may waive the requirement of designing mixes and may allow

the use of established nominal mix proportion, provided always that preliminary trial are

made to establish the volumetric batching procedure and mix strengths. The Contractor will

ensure that any established procedure approved by the Engineer is strictly adhered to, so as to

achieve consistent strength, durability and economy of the concrete while ensuring approved

workability of the mix. Any waiver of mix design or weigh batching will not relieve the

Contractor of his obligations to consistently produce concrete of the specified and approved

strength and durability as determined by works tests defined hereafter. However in any

particular work/part of work, the Engineer may decide to adopt mix design (mix) concrete.

Workability:

The workability of each class of concrete shall be such that satisfactory compaction can be

obtained when the concrete is placed and vibrated in the works. There shall be no tendency to

segregate when it is handled, transported and compacted by the methods which the Contractor

proposes to use when handling, transporting and compacting that class of concrete in the

works.

Concrete Mix Design:

Procedure for designing concrete mixes shall be as per IS: 10262-Recommended Guidelines



for Concrete Mix Design.



Preparation prior to concrete placement, final inspection and approval

Before the concrete is actually placed in position, the insides of the formwork shall be

inspected to see that they have been cleaned and oiled with form oil. Engine oil, Waste oil etc

shall not be used. There shall not be any gaps in the form work. Waste paper, gunny bags,

mud, dung etc shall not be used to close the gaps. Cover blocks with adequate strength shall

be placed to obtain the required cover. No stone chips shall be permitted to be used for cover

blocks. Chairs shall be provided for the top reinforcement rods. Binding wire shall not be

facing towards the cover portion. No laps shall be provided at the center of span at bottom.

Similarly no laps shall be permitted near supports for top reinforcement. Scaffolding shall be

braced and wedges shall be driven in to adjust the height. Laps in scaffolding shall be tied

with binding wire or nailed. The scaffolding should not rest on soil. The spacing of

scaffolding shall not be more than 60 cm. Temporary openings shall be provided to facilitate

inspection, especially of bottoms of columns and wall forms to permit removal of sawdust,

wood shavings, binding wire, dirt, etc. Openings shall be placed or holes drilled so that these

materials and water can be removed easily. Such openings/holes shall be suitably plugged

later.

Slots, openings, holes, pockets, etc., shall be provided in the concrete work in the positions

specified or required or as directed by the Engineer.

Reinforcement and other items to be cast in concrete shall have clean surfaces that will not

impair bond.

Prior to concrete placement, all work shall be inspected and approved by the Engineer and if

found unsatisfactory, concrete shall not be poured until after all defects have been corrected.

Approval by the Engineer of any and all materials and work as required herein shall not

relieve the Contractor from his obligation to produce finished concrete in accordance with the

requirements of the Specifications.

Rain or Wash Water:

No Concrete shall be placed in wet weather or on a water-covered surface. Any concrete that

has been washed by heavy rains shall be entirely removed, if there is any sign of cement and

sand having been washed away from the concrete mixture. To guard against damage which

may be caused by rains, the works shall be covered with tarpaulins immediately after the

concrete has been placed and compacted before leaving the work. Any water accumulating on

the surface of the newly placed concrete shall be removed by approved means and no further

concrete shall be placed there on until such water is removed. To avoid flow of water

over/around freshly placed concrete, suitable drains and sumps shall be provided.

Bonding Mortar:

Immediately before concrete placement begins, prepared surfaces except formwork, which

will come in contact with the concrete to be placed, shall be covered with a bonding mortar

(cement grout) specified.

Formwork (Centering & Shuttering)

General:



Formwork shall be so constructed that concrete can be properly and thoroughly compacted.

Formwork shall be firmly supported and adequately strutted, braced or tied. It shall be

amenable to adjustment to the lines and dimensions of the finished concrete. It shall be

sufficiently strong to resist without excessive distortion under the influence of weather. All

formwork shall be constructed to be rigid to prevent distortion due to pressure of concrete,

incidental loads and vibration during the casting of concrete and sufficiently watertight to

prevent loss of liquid from the concrete. It shall be capable of being removed without shock or

vibration to the concrete. The inside faces of the formwork shall be treated with a mould oil of

type approved by the Engineer taking unmistakable care to prevent mould oil from getting on

to the reinforcement. The lining material shall not bulge, warp or blister and /or stain the

concrete.

Types of form work:

Formwork shall be constructed of sawn timber or other materials as approved by the

Engineer. The edges of the boards shall be planed or otherwise rendered grout tight. This

system shall be adopted when rough formwork is required. Where wrought formwork is

necessary to provide a smooth, fair faced finish, the formwork shall be constructed of purpose

made metal, fiber glass, waterproof plywood panel or hardboard lined form work. The use of

a particular material for wrought formwork shall be consistently maintained throughout the

structure. The surface of the formwork in contact with the concrete shall be smooth and free

from all blemishes. Repeated use of wrought formwork shall depend on surfaces, joints and

edges remaining clean and undamaged. The arrangement of the panels comprising the

formwork for each member shall be subject to the approval of the Engineer prior to

commencement.

Alignment of formwork:

All formwork is to be aligned so that the finished concrete complies with the requirements

and as approved by the Engineer, in advance.

The contractor shall be entirely responsible for the sufficiency and efficiency of the formwork

and also for the safe removal of the same after the safe removal period. At least 14 days

before starting erection of the formwork, the contractor shall prepare detailed drawings and

specifications he proposes to use and get approval of the Engineer. Such an approval shall in

no way relieve the contractor of his sole responsibility for the adequacy, strength and

retention of all the fines in the concrete.

Forms shall be maintained after erection to eliminate bending, warping and/or shrinking. They

shall be checked for dimensions and conditions immediately prior to the placement of

concrete. The Engineer may at any time refuse permission to place concrete within the

formwork until they are constructed or corrected satisfactorily even if he had approved the

formwork earlier.

Metal forms shall be of such thickness that they remain true to shape. Bolts and rivets shall be

counter sunk.

If, at any time of the work during or after placing the concrete, the forms show signs of

sagging or bulging, the concrete shall be removed as instructed by the Engineer, the forms

brought to the proper position and new concrete placed.



Forms shall be cleaned with compressed air immediately before placing concrete to remove

all rubbish and the contractor should ensure that the form work is scrupulously clean from all

debris, dirt, wash water and any other refuse. The reinforcement and formwork will then be

inspected by the Engineer and concreting shall not be commenced until his approval is

obtained. The surface where concrete is placed shall be well wetted before concreting, but no

water shall be accumulated.

All out effort shall be taken by the contractor to avoid any deflection. However, the maximum

allowable deflection shall be as given below.

Location Permissible Deflection

Between adjacent framing members + 2 mm

Between adjacent ties on a frame + 1 mm

Over the full depth of a vertical face ± 3 mm

Over a 3 meter length horizontally ± 3 mm

the formwork shall be made generally with the following upward cambers

Members Desirable Camber

Cantilever slabs - 3 mm for every 1.5 metre of span

Slabs of span not greater than 3 metres - 3 mm for every 3.0 metre of span

Cantilever beams - 6 mm for every 1.5 metre of span

Beams of span not greater than 6 metres - 6 mm for every 3.0 metre of span

Striking or removal of Formwork:

Form for hand rails, ornamental work and other vertical surfaces that require a hand finish

shall be removed as soon as the concrete has hardened sufficiently and approval has been

obtained. Unless specified in the drawing or directed by the Engineer, the following shall be

the minimum intervals of time that should be allowed between finishing the concrete work

and striking the form. Vertical sides of concrete beams, walls and unloaded

columns 1 day Soffits of Slabs (props left in) 7 days, Props to slabs 14 days, Soffits of

beams (props left in) 14 days, Props to beams 21 day. However the contractor shall delay

the removal of shuttering as long as necessary in order to avoid damages to the work.

Removal of shuttering of soffits prior to the props is permissible only if the design of the

shuttering allows such a sequence of operations without the props being in no way disturbed.



If the shuttering and props are not independent, both must be left in place until propping is not

required.

Mixing:

Concrete shall be mixed in mechanical batch type concrete mixers conforming to IS 1791

having two blades and fitted with power loader (lifting hopper type). Half bag mixers and

mixers without lifting hoppers shall not be used for mixing concrete. In exceptional

circumstances, such as mechanical breakdown of mixer, work in remote areas or power break

down and when the quantity of concrete work is very small, hand mixing may be done with

the specific prior permission of the Engineer in writing subject to adding 10% extra cement.

When hand mixing is permitted, it shall be carried out on a water tight platform and care shall

be taken to ensure that mixing is continued until the concrete is uniform in color and

consistency. Before mixing the stone aggregate or gravel shall be washed with water to

remove, dirt, dust and other foreign materials. For guidance, the mixing time may be 11/2 to 2

minutes, for hydrophobic cement it may be taken as 21/2 to 3 minutes.

Machine Mixing:

The mixer drum shall be flushed clean with water. Measured quantity of coarse aggregate

shall be placed first in the hopper. This shall be followed with measured quantity of fine

aggregate and then cement. In case fine aggregate is damp, half the required quantity of

coarse aggregate shall be placed in the hopper, followed by fine aggregate and cement.

Finally the balance quantity of coarse aggregate shall be fed in the hopper, & then the dry

materials are slipped into the drum by raising the hopper. The dry materials shall be mixed for

at least four turns of the drum. While the drum is rotating, water shall be added gradually to

achieve the water cement ratio as specified or as required by the Engineer. After adding water,

the mixing shall be continued until concrete of uniform color, uniformly distributed material

and consistency is obtained. Mixing shall be done for at least two minutes after adding water.

If there is segregation after unloading from the mixer, the concrete should be remixed. The

drum shall be emptied before recharging. When the mixer is closed down for the day or at any

time exceeding 20 minutes, the drum shall be flushed and cleaned with water.

Hand Mixing:

When hand mixing has been specifically permitted in exceptional circumstances by the

Engineer in writing, subject to adding 10% extra cement, it shall be carried out on a smooth,

clean and water tight platform of suitable size. Measured quantity of sand shall be spread

evenly on the platform and the cement shall be dumped on the sand and distributed evenly.

Sand and cement shall be mixed intimately with spade until mixture is of even color

throughout. Measured quantity of coarse aggregate shall be spread on top of cement sand

mixture and mixing done by shoveling and turning till the coarse aggregate gets evenly

distributed in the cement sand mixture. Three quarters of the totally quantity of water required

shall be added in a hollow made in the middle of the mixed pile and the material is turned



towards the middle of pile with spade. The whole mixture is turned slowly over and again and

the remaining quantity of water is added gradually. The mixing shall be continued until

concrete of uniform color and consistency is obtained. The mixing platform shall be washed

and cleaned at the end of the day.

Transportation

General: All buckets, and containers used for transporting concrete shall be water-tight.

Irrespective of the method of transportation adopted, concrete shall be delivered with the

required consistency and plasticity without segregation or loss of slump. However, chutes

shall not be used for transport of concrete without the written permission of the Engineer and

concrete shall not be re-handled before placing.

Re-tempered or Contaminated Concrete: Concrete must be placed in its final position before it

becomes too stiff to work. On no account, water shall be added after the initial mixing.

Concrete, which has become stiff or has been contaminated with foreign materials shall be

rejected and disposed of as directed by the Engineer.

Cleaning of Equipment: All equipment used for mixing, transporting and placing of concrete

shall be maintained in clean condition. All pans, buckets and other equipment shall be

thoroughly cleaned after each period of placement.

Procedure for placing of concrete

Engineer’s approval of equipment & methods: Before any concrete is placed, the entire

placing program, consisting of equipment, layout, proposed procedures and method of placing

shall be submitted to the Engineer for approval and no concrete shall be placed until

Engineer’s approval has been received. Equipment for conveying concrete shall be of such

size and design as to ensure a practically continuous flow of concrete during depositing

without segregation of materials, considering the size of the job and placement location.

Time interval between mixing and placing: Concrete shall be placed in its final position

before the cement reaches its initial set and concrete shall normally be compacted in its final

position within thirty minutes of leaving the mixer and once compacted, it shall not be

disturbed. Where the thirty minute period cannot be complied with, a suitable retarder shall be

used on approval of the retarder, its proportion, method of addition etc. by the Engineer and

the time limit fixed thereof shall be strictly adhered to.

Avoiding Segregation: Concrete shall, in all cases, be deposited as nearly as practicable

directly, in its final position, and shall not be re-handled or caused to flow in a manner which

will cause segregation, loss of materials, displacement of reinforcement, shuttering or

embedded inserts, or impair its strength. For locations where direct placement is not possible,

and in narrow forms, the Contractor shall provide suitable chute to confine the movement of

concrete. Special care shall be taken when concrete is dropped from a height, especially if

reinforcement is in the way, particularly in columns and thin walls.



Placing by manual labor: Except when otherwise approved by the Engineer, concrete shall not

be dropped from a height more than 1.0 m or handled in a manner, which will cause

segregation and shall not be allowed to be re-handled by trowel or rake (panja).

Chuting: Where it is necessary to use transfer chutes, specific approval of Engineer must be

obtained to type, length, slopes, baffles, vertical terminals and timing of operations. These

shall be so arranged that an almost continuous flow of concrete is obtained at the discharge

and without segregation. To allow for the loss of mortar against the sides of the chutes, the

initial mix shall have less coarse aggregate. During cleaning of chutes, the wastewater shall

be kept clear of the forms. Concrete shall not be permitted to fall from the end of the chutes

by more than 1.5 m. Chutes, when approved for use, shall have slopes not flatter than 1 vert:

3 horizons and not steeper than 1 vert.: 2 horizons. Chutes shall be of metal or metal lines

made of circular cross section. The slopes of all chute sections shall be approximately the

same. The discharge end of the chutes shall be maintained above the surface of the concrete

in the forms.

Concrete in Layers: Concreting, once started, shall be continuous until the pour is completed.

Concrete shall be placed in successive, horizontal layers of uniform thickness ranging from 15

cm to 90 cm as directed by Engineer. These shall be placed as rapidly as practicable to

prevent the formation of cold joints or planes of weakness between each succeeding layer

within the pour. The thickness of each layer shall be such that it can be deposited before the

previous layer has stiffened. The bucket loads or other units of deposit shall be spotted

progressively along the face of the layer with such overlap as will facilitate spreading the

layer to uniform depth and texture with minimum shoveling. Any tendency to segregation

shall be corrected by shoveling stones into mortar rather than mortar on to stones.

Bedding of Layers: The top surface of each pour and bedding planes shall be approximately

horizontal unless otherwise instructed.

Compaction:

Concrete shall be compacted during placing, with approved vibrating equipment until the

concrete has been consolidated to the maximum practicable density, free of pockets of coarse

aggregate and fits tightly against all form surfaces, reinforcement and embedded fixtures.

Particular care shall be taken to ensure that all concrete placed against the form faces and into

corners of forms, against hardened concrete at joints is free from voids or cavities. The use of

vibrators shall be consistent with the concrete mix and caution exercised not to over vibrate

the concrete to the point that results segregation.

Type of vibrators: Vibrator shall conform to IS. 2505, IS.2506, IS.2514 or IS.4656

specifications as is appropriate. Type of vibration to be used shall depend on the structures

where concrete is to be placed. External (Shutter) vibrators to be effective, shall be firmly

secured to the form work which must be sufficiently rigid to transmit the vibration and strong

enough not to be damaged by it. Immersion vibrators in sufficient numbers and each of

adequate size shall be used to properly consolidate all concrete. Tapping or external vibrating

of forms by hand tools will not be permitted.



(I) Use of vibrators: The exact manner of application and the most suitable machines for the

purpose must be carefully considered and operated by experienced men. Immersion vibrators

shall be inserted vertically at points not more than 450 mm apart and the spacing be uniform

and withdrawn vertically when air bubbles cease to come to the surface. Immersion vibrators

shall be withdrawn very slowly (20-30mm / second).Time required for vibration is about 90

seconds (less time if workability is more).No hole shall be formed after withdrawing the

needle. In no case shall immersion vibrators be used to transport concrete inside the forms.

Particular attention is paid to vibration at the top of a lift. The total depth of immersion shall

be not more than 2/3 rd of the length of the needle. There shall not be any bends in the cable.

Higher aggregate sizes require lower frequencies of vibration (100f, 150f, 200f for 40mm,

20mm and 10mm size aggregates).The vibrator shall not be nearer than 1m from free end.

Distance between form work and vibrator shall be 100-200mm.

(II) Blending successive layers: When placing concrete in layers, which are advancing

horizontally as the work progresses, great care shall be exercised to ensure adequate vibration,

blending and melding of the concrete between the succeeding layers.

(III) Penetration of vibrators: The immersion vibrator shall penetrate the layer being placed

and also penetrate the layer below for a depth of 100-200 mm while the under layer is still

plastic to ensure good bond and homogeneity between the two layers and prevent the

formation of cold joints.

(IV) Vibrating against Reinforcement (rebar): Care shall be taken to prevent contact of

immersion vibrator against reinforcement steel (rebar). Immersion vibrator shall not be

allowed to come in contact with reinforcement steel after start of initial set. They shall also

not be allowed to come in contact with forms or finished surfaces.

(V) Use of Surface Vibrators: The use of surface vibrators will not be permitted under normal

conditions. However, for thin slabs, surface vibrating by specially designed vibrators may be

permitted, upon approval of Engineer.

(VI) Stone pockets and mortar sandages: The formation of stone pockets and mortar

sandages, in corners and against faces of forms shall not be permitted. Should these occur,

they shall be removed, reformed and refilled to sufficient depth and shape for thorough

bonding, as directed by the Engineer.

Special Provision in placing: When placing concrete in walls with openings, in floors of

integral slabs and beam construction and other similar conditions, the placing shall stop when

the concrete reaches the top of the opening in walls or bottom horizontal surface of the slab,

as the case may be.

Placing shall be resumed before the concrete in place takes initial set, but not until it has had

time to settle as determined by the Engineer.

(VII) Placing concrete through reinforcing steel: When placing concrete through reinforcing

steel, care shall be taken to prevent segregation of the coarse aggregate. Where the congestion

of steel makes placing difficult, it may be necessary to temporarily move the top steel aside to

get proper placement and restore reinforcing steel to design position and the Engineer’s

approval shall be obtained prior to adopting this method.



(VIII) Bleeding: Bleeding or free water on top of concrete being deposited into the forms,

shall cause to stop the concrete pour and the conditions causing this defect corrected before

any further concreting is resumed.

Where the concrete has not fully hardened, all laitance shall be removed by scrubbing the wet

surface with wire or bristle brushes, care being taken to avoid dislodgement of particles of

coarse aggregate. The surface shall be thoroughly wetted and all free water removed. The

surface shall then be coated with neat cement slurry @ 2 kgs of cement per sq.m. On this

surface, a layer of concrete not exceeding 150mm in thickness shall first be placed and shall

be well rammed against corners and close spots; work, thereafter, shall proceed in the normal

way.

Curing and Finishing

Curing – Curing is the process of preventing loss of moisture from the concrete. The

following methods shall be employed for effecting curing.

(I) Moist Curing: Exposed surfaces of concrete shall be kept continuously in a damp or wet

condition by ponding or by covering with a layer of sacking, canvas hessian or similar

materials and kept constantly wet for at least 7 days from the date of placing concrete in case

of ordinary Portland cement and at least 10 days where mineral admixtures or blended

cements are used. The period of curing shall not be less than 10 days for concrete exposed to

dry and hot weather conditions. In the case of concrete where mineral admixtures or blended

cements are used, it is recommended that above minimum periods may be extended to 14

days.

(II) Membrane Curing: Approved curing compounds may be used in lieu of moist curing with

the permission of the Engineer. Such compound shall be applied to all exposed surfaces of the

concrete as soon as possible after the concrete has set. Impermeable membrane such as

polythene sheet covering the concrete surface may also be used to provide effective barrier

against evaporation. Freshly laid concrete shall be protected from rain by suitable covering.

Over the foundation concrete, the masonry work may be started after 48 hours of its

compaction but the curing of exposed surfaces of cement concrete shall be continued along

with the masonry work for at least 7 days. And where cement concrete is used as base

concrete for flooring, the flooring may be commenced before the curing period of base

concrete is over but the curing of base concrete shall be continued along with top layer of

flooring for a minimum period of 7 days. After the concrete has begun to harden i.e. about 1

to 2 hours after laying, it shall be protected from quick drying by covering with moist gunny

bags, sand, canvass hessian or any other material approved by the Engineer. After 24 hours of

lying of concrete, the surface shall be cured by ponding with water for a minimum period of 7

days from the date of placing of concrete in case of OPC and at least 10 days where mineral

admixtures or blended cements are used. The period of curing shall not be less than 10 days

for concrete exposed to dry and hot weather condition. All concrete shall be cured by keeping

it continuously damp for the period of time required for complete hydration and hardening to

take place. Preference shall be given to the use of continuous sprays or water ponding,

continuously saturated coverings of sacking, canvas, hessain or other absorbent materials, or

approved effective curing compounds applied with spraying equipment capable for producing



a smooth, even – texture coating providing that the curing compound shall not lead to

stubborn staining of exposed concrete surfaces. Extra precautions shall be exercised in curing

concrete during cold and hot weather as outlined hereinafter. The quality of curing water

shall be the same as that used for mixing concrete. This is very important. Water from sullage

drains shall not be used for curing.

Curing with Water:

Fresh concrete shall be kept continuously wet for a minimum period of 21 days from the date

of placing of concrete, following a lapse of 12 to 14 hours after laying concrete. This curing

of horizontal surface exposed to the drying winds shall however begin as soon as the concrete

has hardened. Water shall be applied to formed surfaces immediately upon removal of forms.

Quantity of water applied shall be controlled also to prevent erosion of freshly placed

concrete.

Alternate curing methods:

Whenever, in the judgment of the Engineer, it is necessary to omit the continuous spray

method, a covering of clean sand or other approved means such as wet gunny bags, which

will prevent loss of moisture from the concrete, may be used. No type of covering will be

approved which would stain or damage the concrete during or after the curing period.

Covering shall be kept continuously wet during the curing period. For curing of concrete in

floors, flat roofs or other level surfaces, the ponding method of curing is preferred. The

method of containing the ponding water shall be approved by the Engineer. Special attention

shall be given to edges and corners of the slabs to ensure proper protection to these areas. The

ponding areas shall be kept continuously filled with water during the curing period.

Curing equipment:

All equipment and materials required for curing shall be on hand and ready for use before

concrete is placed.

Protecting fresh concrete:

Fresh concrete shall be protected from defacements and damage due to construction

operations by leading forms in place for an ample period as specified later in this

specification. Newly placed concrete shall be protected by approved means such as tarpaulins

from rain, sun and winds. Steps as approved by the Engineer shall also be taken to protect

immature concrete from damage by debris, excessive loading, vibration, abrasion or contact

with other materials, etc. that may impair the strength and/or durability of the concrete.

Workmen shall be warned against and prevented from disturbing green concrete during its

setting period. If it is necessary that the workmen enter the area of freshly placed concrete,

the Engineer may require that bridges be placed over the area.

Repair and replacement of unsatisfactory concrete:

Immediately after the shuttering is removed, the surface of concrete shall be inspected and all

defective areas called to the attention of the Engineer who may permit rectifying of the

defective areas or reject the concrete unit either partially or in its entirety. Rejected concrete

shall be removed and replaced by the contractor to Engineer’s approval. Holes shall be filled



with approved non-shrink spoxy mortar as per manufacturer’s specifications and to

Engineer’s approval. Concrete surfaces shall be finished as described in specifications or as

directed by the Engineer. Honeycombed surfaces and rough patches shall be similarly made

good (with cutting back of concrete to the rear side of reinforcement as required by the

Engineer), in the presence of the Engineer water and air holes shall be filled in. The mortar

shall be well worked into the surface with a wooden float. Excess water shall be avoided.

Unless instructed otherwise by the Engineer, the surface of the exposed concrete placed

against shuttering shall be rubbed down immediately on removal of shuttering lines to remove

any irregularities, care being taken to avoid damaging the surface. If reinforcement is exposed

or honey- combining occurs at any vulnerable position it may be necessary to cut out the

member completely or in part and reconstruct. The decision of the Engineer shall be final in

this regard. If only rectification is necessary, the edges should be cut perpendicular to the

affected surface with a small under cut as is possible. Anchors, tees or dovetail slots shall be

provided whenever necessary to attach the new concrete securely in place. The area extending

several centimeters beyond the edges and the surface of the prepared rectification areas shall

be saturated with water for 24 hours or prepared as per manufacturer’s specifications of the

approved repair material immediately before the rectifying material is placed.

Finishing- General:

The type of finish for formed concrete surfaces shall be as follows, unless varied by the

Engineer. It includes removal of fins and abrupt irregularities, filling defective concrete,

filling of holes left by form ties and rods and clean up of loose or adhering debris. Surfaces

which will be exposed to the weather and which would normally be level shall be sloped for

drainage. Unless a horizontal surface or the slope required is specified, the tops of narrow

surfaces such as stair treads, walls, curbs and parapets shall be sloped across the width

approximately 1 in 30. Broader surfaces such as walkways and platform shall be sloped about

1 in 50. Joints and edges shall be tooled as specified or as directed by the Engineer.

Standard finish for exposed concrete: Exposed concrete shall mean any concrete, other than

floors or slabs, exposed to view upon completion of the works. Unless otherwise specified,

the standard finish for exposed concrete shall be smooth finish. A smooth finish shall be

obtained with the use of lined or plywood forms having smooth and even surfaces and edges.

Panels of forms shall be of uniform size and be as large as practicable and install with closed

joints. Upon removal of forms, the joints marks shall be smoothened off and all blemishes,

projections etc., removed leaving the surfaces smooth.

Protection: All concrete shall be protected against damage until final acceptance by the

Engineer.

Testing of concrete will be done as specified in IS 516.

Preparation of ground for receiving foundations

General:

All earth surfaces upon which or against which concrete is to be placed, shall be well

compacted and free from standing water, mud or debris. Soft, yielding soil shall be removed



and replaced with suitable earth well compacted or lean concrete as directed by the Engineer

where specified, lean concrete shall be provided on the earth stratum for receiving concrete.

The surface of soils against which concrete is to be placed shall be moistened thoroughly so

that no moisture will be drawn from the freshly placed concrete and later shall help to cure the

concrete.

The preparation of concrete surfaces upon which additional concrete is to be placed later,

shall preferably be done by scarifying and cleaning while the concrete is between its initial

and final set. This method shall be used wherever practicable; it shall consist of cutting the

surface with picks and stiff brooms as directed by the Engineer. Great care shall be taken in

performing this work to avoid removal of too much mortar and the weakening of the surface

by loosening of aggregate. The final required result shall be a pitted surface from which all

dirt, unsound concrete, laitance have been removed.

Bonding treatment (Cement grout):

After rock and concrete surfaces upon which new concrete is to be placed have been

scarified, cleaned and wetted as specified herein, they shall receive a bonding treatment,

immediately before placement of the concrete. The bonding medium shall be a coat of cement

mortar (Cement grout). The mortar shall have the same cement- sand proportions as the

concrete which shall be placed on it. Bonding mortar shall be placed in sufficient quantity to

completely cover the surface, about 10mm thick for rock surface and about 5mm thick for

concrete surface. It shall be brushed or boomed over the surface and worked thoroughly into

all cracks, crevices and depressions. Accumulations or puddles of mortar shall not be allowed

to settle in depressions and shall be brushed out to a satisfactory degree, as determined by

Engineer. Mortar shall be placed at such a rate that it can be brushed over the surface just in

advance of the placement of concrete. The amount of mortar that will be permitted to be

placed at any one time, or the area which it is to cover, shall be in accordance with the

Engineer’s directions.

Cleaning and Bonding formed construction joints:

Vertical construction joints shall be cleaned as specified above or by other methods approved

by the Engineer. In placing concrete against formed construction joints, the surface of the

joints, where accessible, shall be coated thoroughly with the specified bed-joints, bonding

mortar immediately before they are covered with concrete or by scrubbing with wire brushes

dipped into the fresh concrete.

Inspection

All materials, workmanship and finished construction shall be subject to continuous

inspection and approval of the Engineer. All materials supplied by the Contractor and all work

or construction performed by the Contractor which are rejected as not being in conformity

with the specification and requirements, shall be immediately replaced. All concrete shall be

protected against damage until final acceptance by the Engineer.

Clean-up



Upon completion of the concrete work, all forms, equipment, construction tools, protective

coverings and any debris resulting from the work shall be removed from the premises. All

debris, i.e. empty containers, scrap wood, etc., shall be removed as directed by the Engineer.

The finished concrete underwater concreting

No concrete shall be placed in water without the Engineer's written permission, which may

only be granted if in his opinion it is not practicable to place the concrete in the dry. Concrete

shall not be placed in running water nor shall concrete be allowed to fall through water. Any

water entering the area where concrete is being placed shall, at the Contractor's expenses, be

kept clear of the concreting works. If under water concreting is permitted, the specified mix of

concrete shall be strengthened by increasing the cement content by at least 10.0% and

reducing the water/cement ratio to no more than 0.45, and the placing shall be only through a

tremie approved by the Engineer. The volume or mass of the coarse aggregate shall not be

more than twice that of the fine aggregate. The materials shall be so proportioned as to

produce a concrete having a slump of not less than 100 mm and not more than 180 mm.

Measurements

Dimensions of length, breadth and thickness shall be measured correct to nearest cm. except

for the thickness of slab and partition which shall be measured to nearest 5 mm. Areas shall

be worked out to nearest 0.01sq.m. Any work done in excess over the specified dimensions

or sections shown in drawing shall be ignored.

Cast-in-situ concrete and or precast concrete work shall be measured in stages described in

the item of work, such as:

At or near the ground level

Up to specified height floor level

Between two specified floor levels

Up to specified height above or depth below plinth level/ defined datum level

Between two specified heights or depths with reference to plinth/defined datum level.

No deduction shall be made for the following:

Ends of dissimilar materials for example beams, posts, girders, rafters, purlins, trusses, corbels and

steps up to 500sq cm in cross sections

Opening up to 0.1 sq meter (1000 sq.cm)

Volume occupied by pipes, conduits, sheathing, etc, not exceeding 100 sq. cm each in cross sectional

areas.

Cast-in-situ and precast concrete work shall be measured separately.



List of Mandatory Tests:

Material Clause Test Field/Laboratory Test

Procedure

Min. Qty

of

Material

for

Frequency

of Testing



Carrying

out test

Stone

aggregate

3.1.2.1

a) Percentage

of soft or

deleterious

material

General visual

Inspection /

Laboratory Test

where required by

the Engineer

I.S 2386

Part II.

One test

for each

source or

as directed

by the

Engineer

One Test

for each

source or as

directed by

the

Engineer

3.1.2.2

Particle size

distribution

Field /Lab

IS. 383

10cum

Every

40cum or

part thereof

3.1.2.4

a) Estimation

of organic

impurities

Field /Lab

I.S 2386

Part II

10cum

- do-

b) Surface

moisture Field /Lab I.S 2386 10cum - do-

c)

Determination

of 10% fine

value

Field /Lab

I.S 2386

10cum

-do -

d) Specified

gravity Field /Lab I.S 2386 10cum - do-

e) Bulk density Field /Lab I.S 2386 10cum - do-

f) Aggregate

crushing

strength

Field /Lab

I.S 2386

10cum

- do-

g) Aggregate

impact value Field /Lab I.S 2386 10cum - do-

Concrete

3.2.2

Slump test

Field

I.S 1199

and I.S

9103

10cum

15 cum or

part thereof

3.2.9

Compaction

Field I.S. 1199

20cum

Every

20cum or

part thereof



Chapter 4

BRICK WORK

5.0 Definitions

5.1 Bricks/ Brick Tiles/ Brick Bats

5.1.1 Dimensions for Bricks/Brick Tiles/Brick Bats

5.1.2 Classification

5.1.3 Sampling and Tests

5.2 Brick Work

5.2.1 Classification for Brickwork

5.2.2 Mortar for Brick Work

5.2.3 Soaking of Bricks

5.2.4 Laying

5.2.5 Joints

5.2.6 Curing

5.2.7 Measurements

5.2.8 Rate

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CHAPTER 4:

BRICK WORK

List of Relevant Bureau of Indian Standard Codes to be followed:

Sl. No. IS. No. Subject

1 IS 1077 Common burnt clay building

bricks.(5th Revision)

2 IS 1200

(Part 3)

Method of measurements of

building and civil

engineering works: Part 3

Brick work. (3rd Revision)

Reaffirmed 1992.

3 IS 2212 Code of practice for brick

work. (1st Revision)

4 IS 3102 Classification of burnt clay

solid bricks. (1st Revision)

(Superseded by Common

burnt clay building bricks)

(5th Revision)

5 IS

3495-

(Part 1-

4)

Method of test for clay

building bricks. (Part 1 to 4

in one volume) (3rd

Revision)

6 IS 5454 Methods of sampling of clay

building bricks.

5.0 DEFINITIONS:

1. Bond: The arrangement of the bricks in successive courses to tie the brick work together both

longitudinally and transversely. The arrangement is usually designed to ensure that no vertical joint of one

course is exactly over the one in the next course above or below it, and there is greatest possible amount of

lap.

2. Bed Joint: Horizontal joint in brick work or masonry.

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3. Closer: Any portion of a brick used in constructing a wall, to close up the bond next to the end brick of

a course.

4. Coping or weathering: The cover applied over or the geometrical form given to a part of structure to

enable it to shed rain water.

5. Corbel: A cantilever projecting from the face of a wall to form a bearing.

6. Cornice: Horizontal or ornamental feature projecting from the face of a wall.

7. Course: A layer of bricks including bed mortar.

8. Cross joint: A joint other than a bed joint normal to the wall face.

9. Efflorescence: A powdery entrustment of salts left by evaporation. This may be visible on the surface or

may be below surface. In the latter case, this is termed as crypto efflorescence.

10. Frog: A defined depression made in the flat side of brick while burning it.

11. Header: A brick lay with its length across the wall.

12. Indenting: The leaving recesses into which future work can be bonded.

13. Jamb: The part of the wall at the side of an opening.

14 Joint: A junction of bricks.

15. Jointing: The operation of finishing joints as the masonry work proceeds.

16. Pier: A thickened section forming integral part of the wall placed at intervals along the wall primarily to

increase the stiffness of the wall or carry a vertical concentrated load. The thickness including the thickness of

the pier is the overall thickness including the thickness of the wall, or when bonded into one leaf of a cavity

wall the thickness obtained by treating this leaf as independent wall.

17. Pillar: Pillar means a detached masonry support. This can be rectangular, circular, elliptical etc. In case

rectangular pillar, the breadth shall not exceed three times the thickness and thickness itself shall not exceed

more than thrice the length of brick.

18. Quoin: An external corner in brick work, the term may also denote the brick used to form the quoin.

Scaffolding: A temporary erection of timber or steel work used in the construction, alteration, demolition or

repairs of a building to support or to attend of the hoisting or lowering of workmen, their tools and materials.

19. Sill: A brick work forming the lower boundary door or window opening.

20. Spandrel: The space between the haunches and the decking of an arch.

21. Stretcher: A brick laid with its length in the direction wall.

22. String course: A horizontal course projecting from a wall usually introduced at every floor level or

windows or parapet for imparting architectural appearance to the structure and also keeping off the rain water.

23. Template: A pattern of sheet metal used as a guide for setting out specific section and shape.

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24. Toothing: Bricks left projecting in alternate courses to bond with future work.

25. Wall joint: A joint parallel to the wall face.

5.1 BRICKS/BRICK TILES/BRICK BATS

Bricks used in the masonry may be of the following type.

(a) Common burnt clay bricks: Shall be hand molded or machine molded. They shall be free from

nodules of free lime, visible cracks, flaws, warpage and organic matter, have a frog 100 mm in length

40mm in width and 10 mm to 20 mm deep on one of its flat sides. Bricks made by extrusion process

and brick tiles may not be provided with frogs. Each brick shall be marked (in the frog where

provided) with the manufacturer’s identification mark of initials.

(b) Tile Brick: The bricks of 4 cm height shall be molded without frogs. Where modular tiles are not

freely available in the market, the tile bricks of F.P.S. thickness 44 mm (1-3/4”) shall be used unless

otherwise specified.

(c) Brick Bats: Brick bats shall be obtained from well burnt bricks.

Dimensions: The brick may be modular or non-modular. Sizes for both types of bricks/tiles shall be

as per Table 5.1. While use of modular bricks/tiles is recommended, non-modular (FPS) bricks/tiles

can also be used where so specified. Non-modular bricks/tiles of sizes other than the sizes mentioned

in Table 5.1 may also be used where specified.

: Dimensions of Bricks/ BRICK TILES/BRICK BATS

TABLE 5.1

Type of Bricks/Tiles Nominal Size, mm Actual Size, mm

Modular Bricks 200×100×100mm 190×90×90mm

Modular Tile Bricks 200×100×40mm 190×90×40mm

Non-modular tile bricks 229×114×44mm 225×111×44mm

Non-modular bricks 229×114×70mm 225×111×70mm

Classification: Bricks/Brick tiles shall be classified on the basis of their minimum

compressive strength as given below:

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TABLE 5.2: Classification of Bricks

Class Designation Average compressive strength

Not less than Less than

N/mm2 (kgf/cm2) N/mm2 (kgf/cm2)

10(100) 10 (100) 12.5 125

7.5(7.5) 7.5 (75) 10 100

5(50) 5 (50) 7.5 75

3.5(35) 3.5 (35) 5.0 50

[Type text] Page 63

The bricks shall have smooth rectangular faces with sharp corner and shall be uniform in color and emit clear

ringing sound when struck.

Sampling and Tests: Samples of bricks shall be subjected to the following tests:

(a) Dimensional tolerance.

(b) Water absorption.

(c) Efflorescence.

(d) Compressive strength.

Sampling: For carrying out compressive strength, water absorption, efflorescence and dimensional

tests, the samples of bricks shall be taken at random according to the size of lot as given in Table 5.3

below. The sample thus taken shall be stored in a dry place until tests are made. For the purpose of

sampling, the following definition shall apply.

(e) Lot: A collection of bricks of same class and size, manufactured under relatively similar conditions of

production. For the purpose of sampling a lot shall contain a maximum, of 50,000 bricks. In case a

consignment has bricks more than 50,000 of the same classification and size and manufactured under

relatively similar conditions of production, it shall be divided into lots of 50,000 bricks or part thereof.

(f) Sample: A collection of bricks selected for inspection and / or testing from a lot to reach the decision

regarding the acceptance or rejection of the lot.

(g) Defective: A brick failing to meet one or more of the specified requirements.

The samples shall be taken as below:

(h) Sampling from a Stack: When it is necessary to take a sample from a stack, the stack shall be divided

into a number of real or imaginary sections and the required number of bricks drawn from each

section. For this purpose bricks in the upper layers of the stacks shall be removed to enable units to be

sampled from places within the stack.

[Type text] Page 64

Note: For other methods of sampling i.e., sampling in motion and sampling from Lorries or trucks,

IS: 5454 may be referred

Scale of sampling and criteria for conformity for visual and dimensional characteristics:

Visual characteristics: The bricks shall be selected and inspected for ascertaining the conformity to

the requirements of the relevant specification. The number of bricks to be selected from lot shall

depend on the size of lot and shall be in accordance of Col. 1 and 2 of Table 5.3 for visual

characteristics in all cases and dimensional characteristics, if specified, of individual bricks.

Visual Characteristics: All the bricks selected above in accordance with Col. 1 and 2 of Table 5.3

shall be examined for visual characteristics. If the number of defective bricks found in the sample is

less than or equal to the corresponding number as specified in Col. 3 of Table 5.3 the lot shall be

considered as satisfying the requirements of visual characteristics, otherwise the lot shall be deemed

as not having met the visual requirements.

(i) Dimensional Characteristics: The number of bricks to be selected for inspecting the dimensions and

tolerance shall be in accordance with Col. 1 and 4 of Table 5.3. These bricks will be divided into

groups of 20 bricks at random and each of the group of 20 bricks thus formed will be tested for all the

dimensions and tolerances. A lot shall be considered having found meeting the requirements of

dimensions and tolerance if none of the groups of bricks inspected fails to meet the specified

requirements.

TABLE 5.3: Scale of sampling and permissible number of

defectives for visual and dimensional characteristics

No. of bricks in the

lot

For characteristics specified

for individual bricks

For dimensional

characteristics

for group of

20bricks No.

of bricks to be

selected

No. of bricks

to be

selec

ted

Permissible

no. of

defecti

ve in

the

sampl

e

2001 10000 20 1 40

10001 35000 32 2 60

35001 50000 50 3 80

[Type text] Page 65

Note: In case the lot contains 2000 or less bricks the sampling shall be as per decision of the

Engineer.

(j) Scale of sampling and criteria for physical characteristics: The lot which has been found satisfactory

in respect of visual and dimensional requirements shall be next tested for physical characteristics like

compressive strength, water absorption, efflorescence as specified in relevant material specification.

The bricks for this purpose shall be taken at random from those already selected above. The number

of bricks to be selected for each of these characteristics shall be in accordance with relevant columns

of Table 5.4.

TABLE 5.4: Scale of sampling for physical characteristics

Lot size Sample size for

compressive

strength, water

absorption and

efflorescence

Permissible No. of

defectives for

efflorescence

2001 10000 5 0

10001 35000 10 0

35001 50000 15 1

Note: In case the lot contains 2000 or less bricks, the sampling shall be as per decision of Engineer.

(K) a lot shall be considered having satisfied the requirements of physical characteristics if the condition

stipulated herein are all satisfied.

(a) From the test results for compressive strength, the average shall be calculated and shall satisfy the

requirements specified in relevant material specification.

Note: In case any of the test results for compressive strength exceeds the upper limit for the class of

bricks, the same shall be limited to the upper limit of the class for the purpose of averaging.

(b) Wherever specified in the material specification, the compressive strength of any individual brick

tested in the sample shall not fall below the minimum average compressive strength specified for the

corresponding class of brick by more than 20 per cent.

(c) From the test results for water absorption, the average for the bricks in the sample shall be calculated

and shall satisfy the relevant requirements specification in material specification.

(d) The number of bricks failing to satisfy the requirements of the efflorescence specified in the relevant

specification should not be more than the permissible no. of defectives given in Col.3 of

Table 5.4.

Dimensional tolerance: The dimensions of modular bricks when tested as described above shall be

within the following limits per 20 bricks.

Length 372 to 388 cm (380 8 cm)

[Type text] Page 66

Width 176 to 184 cm (180 4 cm)

Height 176 to 184 cm (180 4 cm) for 90 mm high bricks

5.2 BRICK WORK

5 Classification for Brick Work: The brick work shall be classified according to the class designation of

bricks used.

6 Mortar for Brick Work : The mortar for the brick work shall be as specified, and conform to accepted

standards. Specifications on mortar are given in Chapter- 6 Building works.

7 Soaking of Bricks: Bricks shall be soaked in water before use for a period for the water to just penetrate

the whole depth of the bricks. Alternatively bricks may be adequately soaked in stacks by profusely

spraying with clean water at regular intervals for a period not less than six hours.

8 Laying: Bricks shall be laid in English Bond unless otherwise specified. For brick work in half brick

wall, bricks shall be laid in stretcher bond. All loose materials, dirt and set lumps of mortar which may

be lying over the surface on which brick work is to be freshly started, shall be removed with a wire

brush and surface wetted. Bricks shall be laid on a full bed of mortar, when laying, each brick shall, be

properly bedded and set in position by gently pressing with the handle of trowel. It’s inside face, shall

be buttered with mortar before the next brick is laid, and pressed against it. Joints shall be fully filled

and packed with mortar such that no hollow space is left inside the joints. The walls shall be taken up

truly in plumb or true to the required batter where specified. All courses shall be laid truly horizontal

and all vertical joints shall be truly vertical. Vertical joints in the alternate course shall come directly

one over the other. Quoin, Jambs and other angles shall be properly plumbed as the work proceeds.

Care shall be taken to keep the pretend properly aligned within following maximum permissible

tolerances:

(a) Deviation from vertical within a storey shall not exceed 6 mm per 3 m height.

(b) Deviation in verticality in total height of any wall of building more than one storey in height shall not

exceed 12.5 mm.

(c) Deviation from position shown on plan of any brick work shall not exceed 12.5 mm.

(d) Relative displacement between loads bearing wall in adjacent storey’s intended to be vertical

alignments shall not exceed 6 mm.

(e) A set of tools comprising of wooden straight edge, Masonic spirit levels, square, 1 meter rule line and

plumb shall be kept on the site of work for every 3 masons for proper check during the progress of

work. All quoins shall be accurately constructed and the height of brick courses shall be kept uniform.

This will be checked using graduated wooden straight edge or storey rod indicating height of each

course including thickness of joints. The position of damp proof course, window sills, bottom of

lintels, top of the wall etc. along the height of the wall shall be marked on the graduated straight edge

or storey rod. Acute and obtuse quoins shall be bonded, where practicable in the same way as square

quoins. Obtuse quoins shall be formed with squint showing three quarters brick on one face and

quarter brick on the other. The brick work shall be built in uniform layers. No part of the wall during

its construction shall rise more than one meter above the general construction level. Parts of wall left

[Type text] Page 67

at different levels shall be raked back at an angle of 45 degrees or less with the horizontal. Tooting

shall not be permitted as an alternative to raking back. For half brick partition to be keyed into main

walls, indents shall be left in the main walls.

All pipe fittings and specials, spouts, hold fasts and other fixtures which are required to be built into

the walls shall be embedded, as specified, in their correct position as the work proceeds unless

otherwise directed by the Engineer. Top courses of all plinths, parapets, steps and top of walls below

floor and roof slabs shall be laid with brick on edge, unless specified otherwise. Brick on edge laid in

the top courses at corner of walls shall be properly radiated and keyed into position to form cut (maru)

corners. Where bricks cannot be cut to the required shape to form cut (maru) corners, cement

concrete M.20 equal to thickness of course shall be provided in lieu of cut bricks.

Bricks shall be laid with frog (where provided) up. However, when top course is exposed, bricks shall

be laid with frog down. For the bricks to be laid with frog down, the frog shall be filled with mortar

before placing the brick in position. In case of walls one brick thick and under, one face shall be kept

even and in proper plane, while the other face may be slightly rough. In case of walls more than one

brick thick, both the faces shall be kept even and in proper plane. To facilitate taking service lines

later without excessive cutting of completed work, sleeves (to be paid separately) shall be provided,

where specified, while raising the brick work. Such sleeves in external walls shall be sloped down

outward so as to avoid passage of water inside. Top of the brickwork in coping and sills in external

walls shall be slightly tilted. Where brick coping and sills are projecting beyond the face of the wall,

drip course/throating (to be paid separately) shall be provided where indicated. Care shall be taken

during construction that edges of jambs, sills and projections are not damaged in case of rain. New

built work shall be covered with gunny bags or tarpaulin so as to prevent the mortar from being

washed away. Damage, if any, shall be made good to the satisfaction of the Engineer.

Joints: The thickness of all types of joints including brick wall joints and cross joints shall be such that

four course and three joints taken consecutively shall measure as follows.

(i) In case of modular bricks conforming to IS: 1077 specification for common burnt clay buildings

bricks, equal to 39 cm.

(ii) In case of non-modular bricks, it shall be equal to 44.4 cm.

Note: Specified thickness of joints shall be of 1 cm. Deviation from the specified thickness of all joints shall

not exceed one fifth of specified thickness

Finishing of Joints:

The face of brick work may be finished flush or by pointing. In flush finishing either the face joints of

the mortar shall be worked out while still green to give a finished surface flush with the face of the

brick work or the joints shall be squarely raked out to a depth of l cm while the mortar is still green for

subsequently plastering. The faces of brick work shall be cleaned with wire brush so as to remove any

splashes of mortar during the course of raising the brick work. In pointing, the joints shall be squarely

raked out to a depth of 1.5 cm while the mortar is still green and raked joints shall be brushed to

remove dust and loose particles and well wetted, and shall be later refilled with mortar to give ruled

finish. Some such finishes are ‘flush’, ‘weathered’, ruled, etc.

Curing:

[Type text] Page 68

The brick work shall be constantly kept moist on all faces for a minimum period of seven days.

Brickwork done during the day shall be suitably marked indicating the date on which the work is done

so as to keep a watch on the curing period.

Measurements

Brick work shall be measured in cubic meters unless otherwise specified. Any extra work over the

specified dimensions shall be ignored. Dimensions shall be measured correct to the nearest 0.01 m.

i.e. 1 cm. Areas shall be calculated to the nearest 0.01 sq m. and the cubic contents shall be worked

out to the nearest 0.01 cubic meters.

Brick work shall be measured separately in the following stages :

(a) From foundation to floor one level (Plinth level)

(b) Plinth (floor one) level to floor two level

(c) Between two specified floor levels above floor two levels. No deductions or additions shall be done

and no extra payment made for the following:

Note: Where minimum area is defined for deduction of an opening, void or both, such areas shall refer only

to opening or void within the space measured.

(a) Ends of dissimilar materials (that is, joists, beams, lintels, posts, girders, rafters, purlins, trusses,

corbels, steps, etc.); up to 0.1 sq.m. in section;

(b) Opening up to 0.1 sq.m. in area (see Note);

(c) Wall plates, bed plates, and bearing of slabs, chajjas and the like, where thickness does not exceed, 10

cm and bearing does not extend over the full thickness of wall;

(d) Cement concrete blocks as for hold fasts and holding down .bolts;

(e) Chases of section not exceeding 50 cm in girth.

(f) Bearing portion of drip course, bearing of molding and cornice.

Note: In calculating area of an opening, any separate lintel or sills shall be included with the size of the

opening but end portions of lintel shall be excluded. Extra width of rebated reveals, if any, shall also

be excluded. Walls half brick thick and less shall each be measured separately in square metres stating

thickness. Walls beyond half brick thickness shall be measured in multiples of half brick which shall

be deemed to be inclusive of mortar joints. For the sizes of bricks specified in 5.1.1, half brick

thickness shall mean 100 mm for modular and 115 mm for non-modular bricks.

Where fractions of half brick occur due to architectural or other reasons, measurement shall be as follows:

(a) Up to l/4th brick - actual measurements and

(b) Exceeding 1 /4 brick-full half bricks.

String courses, projecting pilasters, aprons, sills and other projections shall be fully described and

measured separately in running meters stating dimensions of each projection. Square or rectangular

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pillars shall be measured separately in cubic meters in multiple of half brick. Circular pillars shall be

measured separately in cubic meters as per actual dimensions. Brick work curved on plan shall be

measured like the brick work in straight walls and shall include all cutting and wastage of bricks,

tapered vertical joints and use of extra mortar if any. Brick work curved on plan to a mean radius not

exceeding six meters shall be measured separately and extra shall be payable over the rates for brick

work in straight walls. Nothing extra shall be payable if the mean .radius of the brick work curved in

plan exceeds six meters. Tapered walls shall be measured net as walls and extra payment shall be

allowed for making tapered surface for brick work in walls. Brick work with brick tiles shall be

measured and paid for separately.

Rate:

The rate shall include the cost of materials and labor required for all the operations described above

except the vertical reinforcement and its encasement in cement mortar or cement concrete.

TABLE 5.5: List of Mandatory Tests

Material Clause Test Field/

labor

atory

Test

Minimum Qty. of

material for

carrying

out test

Bricks 5.1.3 Testing of Bricks/

Brick Tiles

for

dimensions

compressive

strength,

water

absorption

and

efflorescence

Laboratory As per Table 5.3

and 5.4

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Chapter 5

BUILDING WORKS

MATERIALS

Water

Water shall be clean, clear and free from injurious quantities of salt, traces of oil, acids, alkalis, organic matter

and other deleterious materials. The sources of water shall be approved by the Engineer. The containers for

conveyance, storage and handling shall be clean. If necessary, standard cement tests shall be conducted using the

water intended to be used, in comparison with those adding distilled water to check the quality of water.

a) Water used for mortars should have quality specified in latest revision of IS.456. It is the

responsibility of the Contractor to arrange at his cost, water of required quality.

b) Water found satisfactory for mixing is also suitable for curing. However, water used for

curing shall not produce any objectionable stain or unsightly deposit on the surface. The

presence of tannic acid or iron compounds in the water meant for curing is objectionable.

c) Sea water shall not be used for mixing or curing.

Cement

The cement used shall be any one of the following, specified in the drawings, and the type selected

should be appropriate for the intended use.

a) 43 grade ordinary Portland cement conforming to IS: 8112.

b) 53 grade ordinary Portland cement conforming to IS; 12269.

Compressive Strength:

Compressive strength requirement of each type of cement for various grades when tested in

accordance with IS: 4031 (part 6) shall be as under:

TABLE 9.1: Compressive Strength Requirement for Cement

Sample Strength in N/mm2 not less than for

Age at testing Gr. 43

Gr. 53

72 + 1 hr 23 27

168 + 2 hrs 33 37

672 + 4 hrs 43 53

Setting time:

Setting time of cement of any type or any grade when tested by Vicat apparatus method described in

IS: 4031 shall conform to the following requirement:

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a) Initial setting time : Not less than 30 minutes

b) Final setting time : Not more than 600 minutes

Supply: The cement shall be packed in jute sacking bags conforming to IS: 2580-1982, or woven

HDPE conforming to IS 11653: 1986, jute synthetic union conforming to IS: 12174: 1987, or any

other approved composite bags, bearing the manufacturer’s name or his registered trade mark if any,

and grade and type of cement. Every delivery of cement shall be accompanied by a producer’s

certificate confirming that the supplied cement conforms to relevant specifications. These certificates

shall be endorsed to the Officer-In-Charge for his record. Every consignment of cement must have

identification marks on packages indicating date of manufacture and grade and type of cement.

Cement brought to works shall not be more than 6 weeks old from the date of manufacture.

Stacking and Storage: Cement in bags shall be stored and stacked in a shed which is dry, leak proof

and as moisture proof as possible. Flooring of the shed shall consist of the two layers of dry bricks

laid on well consolidated earth to avoid contact of cement bags with the floor. Stacking shall be done

about 150 to 200 mm clear above the floor using wooden planks. Cement bags shall be stacked at

least 450 mm clear off the walls and in rows of two bags leaving in a space of at least 600 mm

between two consecutive rows. In each row the cement bags shall be kept close together so as to

reduce air circulation. Stacking shall not be more than 10 bags high to avoid jumping under pressure.

In stacks more than 8 bags high, the cement bags shall be arranged in header and stretcher fashion i.e.

alternately lengthwise and crosswise so as to tie the stacks together and minimize the danger of

toppling over. Different types of cement shall be stacked and stored separately. For extra safety during

monsoon, or when cement is expected to be stored for an unusually long period, each stack shall be

completely enclosed by a water proofing membrane, such as polyethylene, which shall cover the top

of the stack. Care shall be taken to see that the water proofing membrane is not damaged at any time

during use. Storage of cement at the work site shall be at the Contractor’s expense and risk. Any

damage occurring to cement due to faulty storage in Contractor’s shed or on account of negligence on

his part shall be the liability of the Contractor.

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FINE AGGREGATE/ SAND

Fine Aggregate: Sand for concrete work shall be clean, well graded and shall consist of strong, dense,

durable gritty particles, free from veins injurious amounts of disintegrated pieces, alkali, vegetable

matters and other deleterious substances and shall be approved by the Engineer. Maximum size of

particle shall be restricted to 5 mm minimum being 0.15 mm. Grading of sand for use in masonry

mortar shall be conforming to IS: 2116-1980 (Table 9.2-below).

Grading of sand for use in Plaster shall be conforming to IS: 1542-1977 (Table 9.3-below):

TABLE 9.2: Grading of sand for use in masonry mortar as per IS: 2116-1980

IS Sieve Designation Percentage passing by mass Ref to method of test

4.75 mm 100

2.36mm 90 to 100 IS: 2386(Part I) –1963

1.18mm 70 to 100

600 micron 40 to 100

300 micron 5 to 70

150 micron 0 to 15

TABLE 9.3: Grading of sand for use in Plaster as per IS: 1542-1977

IS Sieve Designation Percentage passing

10 mm 100

4.75 mm 95 to 100

2.36 mm 95 to 100

1.18 mm 90 to 100

600 micron 80 to 100

300 micron 20 to 65

150 micron 0-50

Note: For crushed stone sands, the permissible limit on 150 micron IS Sieve is increased to 20%. This

does not affect the 5% allowance IS-2386 (Part I-1963).

Bulking: Fine aggregate, when dry or saturated, has almost the same volume but dampness causes

increase in volume. In case fine aggregate is damp at the time of proportioning the ingredients for

mortar or concrete, its quantity shall be increased suitably to allow for bulk age, which shall be

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determined by the method prescribed in IS standards. Table 9.4 gives the relation between moisture

content and percentage of bulking for guidance only.

TABLE 9.4: Relation between Moisture Content and Bulking Percentage

Moisture content (%) Bulking % by volume

2 15

3 20

4 25

5 30

Stacking: Fine aggregate shall be so stacked as to prevent dust and foreign matter getting mixed up

with it as far as practically possible.

Measurements: As the fine aggregate bulks to a substantial extent when partially wet, measurements

shall be taken when the stacks are dry or appropriate allowance, based on laboratory tests, made for

bulking.

PREPARATION OF MORTAR AND ITS GRADE

Cement Mortar

This shall be prepared by mixing cement and sand in specified proportions

Proportioning: Cement bag weighting 50 kg shall be taken as 0.035 cubic metre. Other ingredients

in specified proportion shall be measured using boxes of size 40x35x25 cm. Sand shall be measured

on the basis of its dry volume.

Mixing: The mixing of mortar shall be done in mechanical mixers operated manually or by power as

decided by the Officer-In-Charge. The Officer-In-Charge may, however, permit hand mixing at his

discretion taking into account the nature, magnitude and location of the work and practicability of the

use of mechanical mixers or where item involving small quantities are to be done or if in his opinion

the use of mechanical mixer is not feasible. In cases, where mechanical mixers are not to be used, the

Contractor shall take permission of the Officer-In-Charge in writing before the commencement of the

work.

a) Mechanical Mixing: Cement and sand in the specified proportions shall be mixed dry thoroughly in a

mixer. Water shall then be added gradually and wet mixing continued for at least three minutes. Only the

required quantity of water shall be added which will produce mortar of workable consistency but not stiff

paste. Only the quantity of mortar, which can be used within 30 minutes of its mixing shall be prepared at

a time. Mixer shall be cleaned with water each time before suspending the work.

b) Hand Mixing: The measured quantity of sand shall be leveled on a clean masonry platform and cement

bags emptied on top. The cement and sand shall be thoroughly mixed dry by being turned over and over,

backwards and forwards, several times till the mixture is of a uniform colour. The quantity of dry mix

which can be used within 30 minutes shall then be mixed in a masonry trough with just sufficient quantity

of water to bring the mortar to a stiff paste of necessary working consistency.

Precautions: Mortar shall be used as soon as possible after mixing and before it begins to set,

and in any case within half hour, after the water is added to the dry mixture.

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STEEL

WORK

DEFINITI

ONS

Bead: A single run of weld metal deposited on surface.

Butt weld: A weld in which the weld metal lies substantially within the extension of the planes are the

surfaces of the parts joined.

Crater: A depression left in weld metal where the arc was broken or the flame was removed.

End crater: A crater at the end of a weld or at the end of a joint.

Fillet Weld: A weld of approximately triangular cross-section jointing two surfaces approximately at

right angles to each other in a lap joint, tee joint or corner joint. It is of two types:

1) Continuous

2) Intermittent

Fusion Welding: Any welding process in which; weld is made between metals in a state of fusion

without hammering or pressure.

Non-fusion Welding: A term applied to the deposition, by the Oxy-Acetylene process of filler metal

on parent metal without fusion of the latter.

Oxy-Acetylene Pressure Welding: Pressure welding in which any Oxy-Acetylene flame is used makes

the surface to be united plastic. No filler metal is used.

Run: The metal deposited during one passage of the electrode or blow pipe in the making of a joint.

Weld: A union between two pieces of metal at faces rendered plastic or liquid by heat or pressure, or

both. Filler metal may be used to affect the union.

MATERIALS

NO re –rolled materials shall be accepted.

Contractor shall submit manufactures test certificate for the steel.

Steel: All finished steel shall be well and cleanly rolled to the dimensions and weight specified in BIS

subject to permissible tolerances as per IS : 1852. The finished materials shall be reasonably free from

cracks, surface flaws laminations, rough and imperfect edges and all other harmful defects. Steel

Sections, shall be free from excessive rust, scaling and pitting and shall be well protected. The

decision of the Officer-In-Charge regarding rejecting any steel section on account of any of the above

defects shall be final and binding.

Rivets: Rivets shall be made from rivet bars of mild steel as per IS: 1148.

STEEL WORK IN SINGLE SECTION FIXED INDEPENDENTLY WITH CONNECTING PLATE

The steel work in single sections of R.S. joints, flats, Tees Angles fixed independently with or without

connecting plate, is described in these clauses.

Fabrication:

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The steel sections as specified shall be straightened and cut square to correct lengths and measured

with a steel tape. The cut ends exposed to view shall be finished smooth. No two pieces shall be

welded or otherwise jointed to make up the required length of a member.

Painting:

All surfaces which are to be painted, oiled or otherwise treated shall be dry and thoroughly cleaned to

remove all loose scale and loose rust, surfaces not in contact but inaccessible after shop assembly,

shall receive the full specified protective treatment before assembly. This does not apply to the

interior of sealed hollow sections. Part to be encased in concrete shall not be painted or oiled. A

priming coat of approved steel prime i.e. Red Oxide Zinc chrome primer conforming to IS: 2074 shall

be applied before any member of steel structure placed in position or taken out of workshop.

Erection:

Steel work shall be hoisted and placed in position carefully without any damage to itself and other

building work and injury to workmen. Necessary mechanical appliances such as tackle winch etc.

shall be used. The suitability capacity of all plant and equipment used for shall be to the satisfaction of

the Officer-In-Charge.

Measurements:

The work as fixed in place shall be measured in running metres correct to a millimeter and calculated

on the basis of standard tables correct to the nearest kilogram. Unless otherwise specified, weight of

cleats, brackets packing pieces, bolts, nuts, washers, pieces, separators, diaphragm gussets (taking

overall square dimensions) fish plates, etc. shall be added to the weight of respective items. In riveted

work, allowance is to be made for weight of rivet heads. Unless otherwise specified an addition of

2.5% of the weight of structure shall be made for shop and site rivet heads in riveted steel structures.

No deduction shall be made for rivet/or bolt holes (excluding holes for anchor or holding bolts)

Deduction in case of rivet/ or bolt holes however be made if its area exceeds 0.02 sq. m. The weight of

steel sheets, plates and strips shall be taken from relevant Indian Standards 7.85 Kg/m2 for every

millimeter sheet thickness. For rolled sections, steel rods and steel strips given in relevant Indian

Standards shall be used.

Rate:

Rate includes the cost of labour and required for all the operations described.

STEEL WORK IN BUILT UP SECTIONS (Riveted and Bolted)

The steel work in built up sections (riveted /bolted) such as in trusses, framed work etc. is specified in

this clause.

Laying Out:

A figure of the steel structure to be fabricated shall be drawn on a level platform to full scale. This

may be done in full or in parts, as shown on drawings or as directed by the Officer-In-Charge. Steel

tape shall be used for measurements.

Fabrication:

Fabrication shall generally be done as specified in IS: 800.

Painting:

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Before the members of the steel structure are placed in position or taken out of the workshop these

shall be painted.

Measurements:

The work as fixed in place shall be measured in running metres correct to a millimeter and their

weight calculated on the basis of standard tables correct to the nearest kilogram. Unless otherwise

specified, weight of cleats, brackets, packing pieces, bolts nuts, washers, distance pieces, separators

diaphragm gussets (taking overall square dimensions) fish plates etc. shall be added to the weight of

respective items. No deductions shall be made for skew cuts. In riveted work, allowances are to be

made for weight of rivet heads. Unless otherwise specified an addition of 2.5% of the weight of

structure shall be made for shop and site rivet heads in riveted steel structures No deduction shall be

made for rivet/or bolt holes (excluding holes for anchor or holding down bolts). Deduction in case of

rivet or bolt hole shall, however, be made if its area exceeds 0.02 m2. The weight of steel sheet and

strips shall be taken from relevant Indian Standards based on 7.85kg /m2 steel rods and steel strips,

weight given in Indian Standards shall be used.

Rate:

The rate shall include the cost of all materials and labour involved in all the operations described

above.

STEEL WORK IN BUILT UP SECTION (WELDED)

The steel work in built up sections (welded) such as in trusses, framed work etc. is specified in this

clause. Straightening, shaping to form, cutting and assembling, shall be as specified in the manual as

far as applicable, except that the words "riveted or bolted" shall be read as "welded" and holes shall

only be used for the bolts used for temporary fastening as shown in detailed drawings.

Welding:

Welding shall generally be done, by electric arc process as per IS : 816 and IS : 823.

COLLAPSIBLE GATES:

These shall be of approved manufacture and shall be fabricated from mild steel sections. The gates

shall consist of double or single collapsible gates depending on the size of the opening. These shall

consists of vertical double channels each 20 x 10 x 2 mm. at 10 cm centres braced with flat iron

diagonals 20 × 5 mm and top ,and bottom rails of T-iron 40 x 40 x 6 mm @ 3.5 kg/m with 40 mm dia.

ball bearings in every fourth double channel, unless otherwise specified. Wherever collapsible gate is

not provided within the opening and fixed along the outer surface, T - iron at the top may be replaced

by flat iron 40 x 10 mm. The collapsible gate shall be provided with necessary bolts and nuts, locking

arrangement, stoppers and handles. Any special fittings like spring, catches and locks, shall be so

specified in the description of item where so required. The gate shall open and close smoothly and

easily.

Fixing:

T - Iron rails shall be fixed to the floor and to the lintel at top by means of anchor bolts embedded in

cement concrete of floor and lintel. The anchor bolts shall be placed approximately at 45 cm centers

alternatively in the two flanges of the T - iron. The bottom runner (T- iron) shall be embedded in the

floor and proper groove shall be formed along the runner for the purpose. The collapsible shutter shall

be fixed at sides by fixing the end double channels with T - iron rails and also by hold - fasts bolted to

the end double channel and fixed in masonry of the side walls on the other side. In case the collapsible

shutter is not required to reach the lintel, beam or slab level, a Tee - section suitably designed may be

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fixed at the top, embedded in masonry and provided with necessary clamps and roller arrangement at

the top. All the adjoining work damaged in fixing of gate shall be made good to match the existing

work, without any extra cost.

Painting:

All the members of the collapsible gate including T - iron shall be thoroughly cleaned off rust, scales,

dust etc. and given a priming coat of approved steel primer i.e. red oxide zinc chrome primer

conforming to IS : 2074 before fixing them in position.

Measurements:

The height and breadth shall be measured correct to a cm. The height of the gate shall be measured as

the length of the double channels and breadth from outside to outside of the end fixed double channels

in open position, of the gate. The area shall be calculated in square metres, correct to two places of

decimal.

Rate:

The rate shall include the cost of materials and labour involved in all the operations described above.

M.S. SHEET SHUTTERS:

These shall be manufactured as per drawing and specifications. These shall be fabricated from mild

steel sheets and angle iron. The doors shall be provided as double leaf shutters unless otherwise

specified. The shutters shall be fabricated with frame of M.S. angle 40 x 10 x 6 mm @ 3.5 kg/metre

and two diagonal braces of the same section unless otherwise specified. The frame shall be rivetted

and/or welded at the junctions. Wherever rivettmg shall be done 3 mm thick gusset plate shall be

provided at the junctions, M.S. sheet of 1 mm thickness or as specified shall be fixed to the frame with

rivets or welds as approved by the Officer-In-Charge. Alternatively the diagonal bracing may be

replaced by one horizontal and two cross flats 30 x 6 mm unless otherwise specified. The outer frame

shall be provided with cleats made of section 40 x 10 mm and bent in the shape of angle cleats with

one arm 150 mm long and the arm 50 mm long and fixed to the angle iron frame of the door with two

12 mm dia bolts ani nuts. For doors upto 2.40 m height, two angles cleats per door shall be provided.

The cleat shall have a vertical leg of 150 mm which shall be fixed with frame and horizontal leg of

about 50 mm which shall be provided with a hole of 24 mm dia and fixed in the projected pin of the

pin clamp.

Fittings and Fixtures:

The shutter shall be fixed to the wall masonry with four pin damps (pintles) where the height of the

shutter is upto 2.4 m. Each pin clamp shall consist of 50 x 6 mm flat iron 45 cm long bend and forked

at one end and provided with 20 mm diameter M.S. pin on the other. The pin shall be firmly rivetted

or welded to,the pin damp, the other end of which shall be embedded in masonry by means of cement

concrete block 40 x 20 x 20 cm of 1:3:6 mix (1 cement: 3 coarse sand : 6 graded stone aggregate 20

mm nominal size). It shall be so placed that bottom pin shall face upwards and top pin downward in

order that the gate may not be removed by lifting over pins. One hook with eye 45 cm long of 10 mm

diameter shall be provided for each shutter to keep it fixed in open position. The hook shall be fixed in

wall masonry with wooden block and the eye shall be fixed on 6 mm thick M.S. plate as staple and

fixed in the shutter frame with rivet or weld. A cement concrete block 15 x 10 x 20 cm in 1:2:4 (1

cement : 2 coarse sand : 4 grades stone aggregate of 20 mm nominal size) mix shall be embedded in

the floor or at junction of two shutters so that door shutter open only on the outside and not on the

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inside. The shutters shall also be provided with locking arrangement and two handles of the shape and

as approved by the Officer-In-Charge.

Painting:

All the members of the door including angle iron shall be thoroughly cleaned off rust, scales, dust etc.

given a priming coat of approved steel primer i.e. Red oxide Zinc chrome primer confirming to IS :

2074 before fixing them in position.

Measurements:

The width and height of shutters shall be measured to the nearest cm. The area shall be calculated in

square metre correct to two places of decimal.

Rate:

The rate shall include the cost of materials and labour involved in all the operations described above.

Nothing extra shall be paid for cement concrete blocks or wooden blocks nor anything deducted for

these from the measurement of the masonary wall.

ROLLING SHUTTERS;

Rolling shutters shall conform to IS : 6248. These shall include necessary locking arrangement

handles etc. These shall be suitable for fixing in the position as specified i.e. outside or inside on or

below lintel or between jambs of the opening. The door shall be either push and pull type or operated

with mechanical device supplied by the firm. Shutters upto 10 sq metre shall be of push and pull type

and shutters with an area of over 10 sq. metre shall generally be provided with reduction gear operated

by mechanical device with chain or handle, if bearings are specified for each of operation, these shall

be paid for separately.

Shutter:

The shutter shall be built up of interlocking lath section formed from cold rolled steel strips. The

thickness of the sheets from which the lath sections have been rolled shall be not less than 0.90 mm

for the shutters upto 3.5 m width and not less than 1.20 mm for shutters above 3.5 m width. Shutters

above 9 meters in width should be divided in 2 parts with provision of one middle fixed or movable

guide channel or supported from the back side to resist wind pressure. The lath section shall be rolled

so as to have interlocking curls at both edges and a deep corrugation at the centre with a bridge depth

of not less than 12 mm to provide sufficient curtain of stiffness for resisting manual pressures and

normal wind pressure. Each lath section shall be continuous single piece without any welded joint.

When interlocked, the lath sections shall have a distance of 75 mm rolling centers. Each alternate lath

section shall be fitted with malleable cast iron or mild steel clips securely rivetted at either ends, thus

locking the lath section at both ends and preventing lateral movement of the individual lath sections.

The clips shall be so designed as to fit five contour of the lath sections.

Spring:

The spring shall be of coiled type. The spring shall be manufactured from high tensile spring steel

wire or strips of adequate strength conforming to IS: 4454-Part I.

Roller and Brackets:

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The supension shaft of the roller shall be made of steel pipe conforming to heavy duty as per IS: 1161.

For shutter up to 6 metre width and height not exceeding 5 metre, steel pipes of 50 mm nominal bore

shall used. The shaft shall be supported on mild steel brackets of size 375 x 375 x 3.15 mm for

shutters upto a clear height of 3.5 metre. The size of mild steel brackets shall be 500 x 500 x 10 mm

for shutters of clear height above 3.5 m and upto 6.5 m. The suspension shaft clamped to the brackets

shall be fitted with rotatable cast iron pulleys to which the shutter is attached. The pulleys and pipe

shaft shall be connected by means of pretensioned helical springs to counter balance the weight of the

shutter and to keep the shutter in equilibrium in any partly open position. When the width of the

opening is greater than 3.5 mtr. the cast iron pullyes shall be interconnected with a cage formed out of

mild steel flats if at least 32 x 6 mm and mild steel dummy rings made of similar flats to distribute the

torque uniformly. Self aligning two row ball bearing with special cast iron casings shall be provided at

the extreme pulley and caging rings shall have a minimum spacing of 15 mm and at least 4 number

flats running throughout length of roller shall be provided. In case of shutters of large opening with

mechanical device for opening the shutter the roller shall be fitted with a purion wheel at one end

which in contact with a worm fitted to the bracket plate, caging and pully with two ball bearing shall

be provided.

Guide Channel:

The width of guide channel shall be 25 mm the minimum depth of guide channels shall be as follows:

TABLE 9.5 Details of Shutters and Guide Channel

Clear width of shutters Depth of guide channel

Upto 3.5 m 65 mm

3.5 m upto 8 m 75 mm

8 m and above 100.mm

The gap between the two legs of the guide channels shall be sufficient to allow the free movement of

the shutter and at the same time closes enough to prevent rattling of the shutter due to wind.

Each guide channel shall be provided with a minimum of three fixing cleats or supports for

attachment to the walls or column by means of bolts or screws. The spacing of cleats shall not exceed

0.75 m. alternatively, the guide channels may also be provided with suitable dowels, hooks or pins for

embedding in the walls. The guide channels shall be attached to the jambs, plumb and true either in

the overlapping fashion or embedded in grooves, depending on the method of fixing.

Cover:

Top cover shall be of mild steel sheets not less than 0.90 mm thick and stiffened with angle or

stiffeners at top and bottom edges to retain shape. Lock plates with sliding bolts, and anchoring rods

shall be as per IS : 6248.

Fixing:

The arrangement for fixing in different situations in the opening shall be as per IS: 6248.Brackets

shall be fixed on the lintel or under the lintel as specified with rawl, plugs, and screws bolts etc. The

shaft along with the spring shall then be fixed on the brackets. The lath portion (shutter) shall be laid

on ground and the side guide channels shall be bound with ropes etc. The shutter shall then be placed

in position and top fixed with pipe shaft with bolts and nuts. The side guide channels and cover frames

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shall then be fixed to the walls through the plated welded to the guides. These plates and bracket shall,

be fixed by means of steel screws bolts, and raw plugs concealed in plaster to make their location

invisible. Fixing shall be done accurately in a workmen like.manner that the operation of the shutter is

easy and smooth.

Measurements:

Clear width and clear height of the opening for rolling shutter shall be measured correct to a mm. The

clear distance between the two jambs of the opening shall be clear width and the clear distance

between the sill and the soffit (bottom of lintel) of the opening shall be the clear height. The area shall

be calculated in square metres correct to two places of decimal.

Rate:

The rate shall include the cost of materials and labour involved in all the operations described above

including cost of top cover and spring except ball bearing and mechanical device of chain and crank

operation, which shall be paid for separately.

STEEL DOOR, WINDOWS, VENTILATORS AND COMPOSITE UNITS

Hot rolled steel sections for fabrication of steel doors, windows, ventilators and fixed lights shall

conform to IS: 7452. Shapes weights and designations of hot rolled sections shall be as per IS: 7452.

Door :

The hinges shall be of 50 mm projecting type, Non projecting type hinges may also be used if

approved by the Officer-In-Charge. The hinge pin shall be of electro-galvanized steel or aluminum

alloy of suitable thickness and size. Door handles shall be approved by the Officer-In-Charge. A

suitable latch locks for door open able both from inside and outside shall be provided.

In the case of double doors, the first closing leaf shall be the left hand leaf locking at the door from the

push side. The first closing shutter shall have a concealed steel bolt at top and bottom. The bolts shall

be so constructed as not to work loose or drop by its own weight. Single and double shutter door may

be provided with a three way bolting device. Where the device is provided in the case of double

shutters, concealed brass or steel bolts shall not be provided.

Windows

a) For fixed windows, the frames shall be fabricated as per relevant standard

b) Side hung windows

For fixing steel hinges, slots shall be cut in the fixed frame and hinges inserted inside and welded to

the frame at the back. The hinges shall be of projecting type with thickness not less than 3.15 mm and

length not less than 65 mm and width not more than 25 mm. Non-projecting type hinges may also be

allowed if approved by the Officer-In-Charge. The diameter of hinge pins shall not be less than 6 mm.

The hinge pin and washer shall be of galvanised steel or aluminium alloy of suitable thickness. For

fixing hinges to inside frame, the method described above may be adopted but the weld shall be

cleaned, or the holes made in the inside frame and hinge rivetted.

Ventilators:

a) Top Hung Ventilators

The steel butt hinges for top hung ventilators shall be rivetted to the fixed frame or welded to it at the

back after cutting a slot in it. Hinges to the opening frame shall be rivetted or welded. Top hung

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ventilators shall be provided with a peg stay with three holes which when closed shall be held tightly

by the locking bracket. The locking bracket shall either be fitted to the fixed frames or to the window.

b) Centre Hung Ventilators

Central hung ventilators shall be hung on two pairs of brass or aluminium cup pivots as specified,

rivetted to the inner and outer frames of ventilators to permit the ventilator shutter to swing to an

angle of approx 85°. The opening portion of the ventilators shall be so balanced that it remains open at

any desired angle under normal weather conditions. Fixing in Masonry Openings

a) Fixing with Lugs

i) Doors, windows and ventilators unit, shall not be “built in” as the work proceeds but opening shall

be left out and frames fitted afterwards so that the minimum specified clearance between opening and

unit frame is left around. The size of the opening shall first be checked and cleared of obstruction, if

any. The position of the unit and fixing holes shall be marked on the jamb. Necessary holes shall be

made in the masonry and lugs not less than 10 cm long 15 × 3 mm size fixed in cement concrete

blocks 15 x 10 x 10 cm size of 1:3: 6 mix (1 cement: 3 coarse sand 6 graded stone aggregate 20 mm

nominal size) frames of units shall be set in the opening by using wooden wedges at the jamb, head

and sill, (wedges shall preferably be placed near the points where glazing bar meets the frames and be

plumbed in position).

ii) After it, the frame shall be fixed with the lugs with 20mm long and 6.3 mm dia. G.I. counter sunk

machine screws and nuts. In case of flush opening which are rendered smooth, wedges shall be

removed and gap between unit and the jambs shall be filled with cement mortar.

iii) In case of flush jamb with external “fair faced” finish the gap between the opening and frame shall

be filled with mastic from inside till it oozes out on external face. The oozing mastic shall be cleaned

and flush pointed. The internal gap shall be filled with mastic to about 1/3rd depth and the rest with

cement mortar.

iv) In case of rebated jambs and jambs finished “fair faced” externally, the mastic shall be freely

applied to the inside channel of frame, jamb and sill, so as to ensure a watertight joint. After the unit is

firmly fixed in position surplus mastic shall be cleaned and flush pointed, as shown

b) Fixing with screws and plugs:

In R.C.C. work where lugs cannot be embedded due to reinforcement bars etc. rawl plugs or other

approved metallic fasteners may be fixed in proper position and frame fixed to them with 60 mm

galvanized wood screws of designation 10.

Fixing in Wood Work Opening : Opening in wood work are normally rebated and approved mastic or

rubber linings shall be applied to jambs, sill and channel before fixing in position. The frame shall be

set in opening using wooden wedges and fixed to the opening with 60 mm galvanized wood screws of

designation 10. Extra timber fillets of hard wood to match the adjoining work shall also be provided

around the frame to close the extra gap between opening and frame

Fixing in Steel Work Opening:

Before placing the unit frame in position approved mastic shall be applied and a mild steel or hard

wood fillet shall be provided around the frame to close the extra gap between opening and frame. The

unit shall then be fixed to the opening with fixing clips or with nuts and bolts as shown in the

drawings or as directed by the Officer-In-Charge.

Fixing Procedure:

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Fixing Procedure for T iron doors, windows and ventilator frames in masonry opening shall be as

relevant standards as given in the general specifications in this volume.

Measurements:

T iron door, windows and ventilator frames shall be mesasured in running metre, along the centre line

of the frame correct to a 1 mm and weight calculated on the basis of standard tables. No deduction or

extra payment shall be made for making holes and making arrangements for fixing fittings including

packing wherever necessary. No deduction will be made for not providing tie bars in case of windows

and ventilators.

Rate:

The rate includes cost of materials and labour involved in all the operations described above. It shall

include the necessary butt hinges and screws for fixing the same with frame or as specified. But it

does not include the cost of other door, window and ventilator fittings.

M.S. BARS AND M. S. GRILLS IN WOODEN OR STEEL FRAMES

M.S. round or square bars, with or without M.S. flats M.S. grills of different patterns with flats with

M. S. or without M. S. bars, round or square,fixed in wooden or steel windows or clerstory windows

etc. are described in this clause.

Fixing:

When MS round or square bars are to be fixed to wooden frames the bars shall be passed in to the

wooden frame, from the end having a through hole and fixed flush with that end while at the other end

it will be 5 cm deep in the hole drilled in the frame. In case of steel frames, the bars will be welded to

the steel frame by fillet weld all along the circumference of the bars in an approved workshop and not

at site. In case of grill of bars welded to M.S. Flat forming the required pattern, the outer frame of

M.S. flats shall be fixed to the wooden frame with wood screws in the counter sunk holes drilled in

M.S. flats ensuring that screws are driven with some screw driver (not hammered) till the screws are

embedded fully inside flush with the M.S. flats. In case of fixing to steel frames, M.S. flats of required

pattern with or without M.S. round or square bars, the method of fixing will be similar to what is

described above. Any kind of welding at site shall be permitted only under written orders of the

Officer-In-Charge.

Measurements:

The different types of M.S. grills will be measured separately and paid for. The length of bars and

flats used in grills will be measured correct to a cm and then weights calculated in kg by using

standard tables.

Rate:

The rate shall include the cost of materials and labour required for all the operations described above.

Grill of different types shall be paid for separately.

Following are the mandatory tests to be conducted at appropriate stages of the work

TABLE 9.6 LISTS OF MANDATORY TESTS

Material Test Field/ laboratory

Test

Test

Procedure

Minimum Qty. of

material for

carrying out test

Frequency

of testing

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Steel if arranged by

the contractor

(a) Tensile Strength

(b) Bend test

Laboratory IS : 1599 20 Tonne Every 20

Tone or part

thereof

FLOORING

CEMENT CONCRETE FLOORING

Cement Concrete

Cement concrete of specified mix shall be used and it shall generally conform to the specifications.

Laying

Panels

Flooring of specified thickness shall be laid in the pattern including the border/or as given in the

drawings or as directed by the Officer-In-Charge. The border panels shall not exceed 450 mm in

width, and the joints in the border in line with panel joints. The panels shall be of uniform size and no

dimension of a panel shall exceed 2 m and the area of a panel shall not be more than 2 sqm.

Laying of flooring with strips: Normally cement concrete flooring shall be laid in one operation using

glass/plain asbestos/aluminium/PVC/brass strips or any other strips as required as per drawing or

instructions of the Engineer-in- Charge, at the junction of two panels. This method ensures uniformity

in colour of all the panels and straightness at the junction of the panels. 4 mm thick glass strips or 5

mm thick plain asbestos sheet, 2mm PVC strips or 2 mm aluminium or brass strips shall be fixed with

their tops at proper level, giving required slopes. Cost of providing and fixing strips shall be paid for

separately.

Concreting: Cement concrete shall be placed in the panels and be levelled with the help of straight

edge and trowel and beaten with a wooden 'Thapy' or mason's trowel. The blows shall be fairly heavy

in the beginning but as consolidation takes place, light rapid strokes shall be given. Beating shall

cease as soon as the surface is found covered with a thin layer of cream of mortar. The evenness of the

surface shall be tested with straight edge and made true to required slopes. While laying concrete, care

shall be taken to see that the strps are not damaged/ disturbed by the labourers. The tops of strips shall

be visible clearly after finishing with cement slurry.

Laying of flooring without Strips: Laying of cement concrete flooring in alternate may be allowed by

the Officer-In-Chargein case strips are not to be provided.

Shuttering: The panels shall be bounded by angle iron or flats. The angle iron/flat shall have the same

depth as the concrete flooring. These shall be fixed in position, with their top at proper level giving

/required slopes. The surface of the angle iron or flats, to come in contact with concrete shall be

smeared with soap solution or non-sticking oil (Form oil or raw linseed oil) before concreting. The

flooring shall butt against the unplastered masonry wall. The angle iron/ flats used for shuttering, shall

be removed on the next /day of the laying of cement concrete. The ends thus exposed shall be

repaired, if damaged with cement mortar 1:2 (1 cement: 2 coarse sand) and allowed to set for

minimum period of 24 hours. The alternate panels shall then be cleaned of dust, mortar, droppings etc.

and concrete laid. While laying concrete, care shall be taken to see that the edges of the previously

laid panels are not damaged and fresh mortar is not splashed over them. The joints between the panels

should come out as fine straight lines.

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Finishing:

The finishing of the surface shall follow immediately after the cessation of beating. The surface shall

be left for some time, till moisture disappears from it or surplus water can be mopped up. Use of dry

cement or cement and sand mixture sprinkled on the surface to stiffen the concrete or absorb

excessive moisture shall not be permitted. Excessive trowelling shall be avoided. Fresh cement shall

be mixed with water to form a thick slurry and spread at the rate of 2 kg of cement over an area of one

sqm of flooring while the flooring concrete is still green. The cement slurry shall then be properly

processed and finished smooth. The edges of sunk floors shall be finished and rounded with cement

mortar 1:2 (1 cement: 2 coarse sand) and finished with a floating coat of neat cement. The junctions of

floor with wall plaster, dado or skirting shall be rounded off where so specified. The men engaged on

finishing operations shall be provided with raised wooden platform to sit on so as to prevent damage

to new work.

Curing:

The curing shall be done for a minimum period of ten days. Curing shall not be commenced until the

top layer has hardened. Covering with empty gunnies shall be avoided as the colour of the flooring is

likely to be bleached due to the remanents of cement dust from the bags.

Measurement:

Length and breadth shall be measured before lying skirting dado or wall plaster. No deduction shall be

made nor extra paid for voids not exceeding 0.20 sqm. Deductions for ends of dissimilar materials or

other articles embedded shall not be made for areas not exceeding 0.10 sqm. The flooring done either

with strips (in one operation) or without strips (in alternate panels) shall be treated as same and

measured together.

Rate:

The rate shall include the cost of all materials and labour involved in all the operations described

above including application of cement slurry on RCC slab or on base concrete including roughening

and cleaning the surface but excluding the cost of strips which shall be paid separately under relevant

item. Nosing of steps where provided shall be paid for separately in running meter. Nothing extra

shall be paid for laying the floor at different levels in the same room or courtyard and rounding off

edges of sunken floors. In case the flooring is laid in alternate panels, nothing extra shall be paid

towards the cost of shuttering used for this purpose.

ROOFING:

TERMINOLOGY

Accessories : Purpose made fittings, such as apron flashing pieces, barge boards, bottom glazing

flashing, corner piece (corner flashing), eaves filler nieces, expansion joints, hip capping, hip tile or

cap, ridge capping, ridge finials, roof lights, ventilators, with which the roof is furnished.

Eaves: The lower edge of the inclined roof.

Finial: A decorative fitting used at the junction or ridges and hips to form a water proof covering and

at the top of conical, pyramidal, or dome roofs.

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Flashing: A strip of impervious material, usually metal used to exclude water from the junction

between a roof covering and another part of the structure.

Gable: Part of wall above the general eaves level at tie end of ridged or partially hipped roof.

Gutter: Any form of roof water channel.

Hip: The outer angle (more than 180 degree) formed by the inclined ridge between two intersecting

roof slopes.

Pitch

The angle of inclination with the horizontal of the rafters or substructure surface on which the roof

coverings are laid. In patent glazing, the angle at which the plane of a stretch of glazing is inclined to

the horizontal.

Pitched Roof: A roof the pitch of which is greater than 10 degree to the horizontal.

Ridge: The horizontal inter-section at the apex of the two rising roof surfaces inclined in opposite

directions.

Valley: The re-entrant angle formed by the inter-section of two inclined roof surfaces. Verge free edge

of a roof surface ending at a gable.

CORRUGATED GALVANISED STEEL SHEET ROOFING

C.G.S. Sheets: These shall be of the thickness specified in the description of the item and shall

conform to IS:277. The sheets shall be of grade of coating unless otherwise specified in the

description of .The sheets shall be free from cracks, split twists, surface flaws etc. They shall be clean,

and smooth. The galvanizing shall be non-in and in perfect condition. The sheets shall not signs of

rust or white powdery deposits on the surface. The corrugations shall be uniform in depth pitch and

parallel with the side.

Purlins: Purlins of the specified material or M.S. rolled sections of requisite size shall be over the

principal rafters. These shall not be at more than the following distances.

TABLE 9.7

Thickness of C.G.S. sheet Maximum spacing of purlins

1.60mm

1.25 mm

1.00 mm

0.80 mm

0.63 mm

2.80 metre

2.40 metre

2.00 metre

1.80 metre

1.60 metre

The top surfaces of the purlins shall be uniform and plane. They shall be painted before fixing top.

Embedded portions of wooden purlins shall be painted before fixing on top. Embedded portions of

wooden purlins shall be coal tarred with two coats.

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Slope: Roof shall not be pitched at a flatter slope than 1 vertical to 5 horizontal. The normal pitch

adopted shall usually be 1 vertical to 3 horizontal.

Laying and fixing:

The sheets shall be laid and fixed in manner described below, unless otherwise shown in the working

drawings or directed by the Officer-In-Charge. The sheets shall be laid on the purlins true plane, with

the lines of corrugations parallel or normal to the sides of the area to be covered unless otherwise

required as in special shaped roofs. The sheets shall be laid with a minimum lap of 15 cm at the ends

and 2 ridges of corrugations at each side. The above minimum end lap of 15 shall apply to slopes of 1

vertical to 2 horizontal and steeper slopes. For flatter slopes the minimum permissible end lap shall be

20 cm. The minimum lap of sheets with ridge, hip and valley shall be 20 cm measured at right angles

to the line of the ridge, hip and valley respectively. These sheets shall be cut to suit the dimensions or

shapes of the roof, either along their length or their width or in a slants across their lines of

corrugations at hips and valleys. They shall be cut carefully with a straight edge chisel to give a

smooth and straight finish. Lapping in C.G.S sheets shall be painted with a coat of approved steel

primer and two coats of painting with approved paint suitable for G.S sheet, before the sheets are

fixed in place. Sheets shall not generally be built into gables and parapets. They shall be bent up along

their side edges close to the wall and the junction shall be protected by suitable flashing or by a

projecting drip course, the later to cover the junction by at least 7.5 cm. The laying operation shall

include all scaffolding work involved. Sheets shall be fixed to the purlins or other roof members such

as hip or valley rafters etc. with galvanised J or L hook bolts and nuts, 8 mm diameter, with bitumen

and G.I. limpet washers or with a limpet washer filled with white lead as directed by the Officer-In-

Charge. While J hooks are used for fixing sheets on angle iron purlins, and L hooks are used for fixing

to R.S. joists, timber or precast concrete purlins. The length of the hook bolt shall be varied to suit the

particular requirements. The bolts shall be sufficiently long so that after fixing they project above the

top of the nuts by not less than 10 mm. The grip of J or L hook bolt on the side of the purlin shall not

be less than 25 mm. There shall be a minimum of three hook bolts placed at the ridges of corrugations

in each sheet on every purlin and their spacing shall not exceed 30 cm. Coach screws shall not be used

for fixing sheets to purlins. The galvanised coating on J or L hooks, and bolts shall be continuous and

free from defects such as blisters, flux stains, drops, excessive projections or other imperfections

which would impair serviceability. The galvanised coating should conform to IS : 1367 Where slopes

of roofs are less than 21.5 degrees (1 vertical to 2.5 horizontal) sheets shall be joined together at the

side laps by galvanised iron bolts and nuts 25 x 6 mm size, each bolt provided with a bitumen and a

G.I. limpet washer or a G.I. limpet washer filled with white lead. As the overlap at the sides extends to

two corrugations, these bolts shall be placed zig zag over the two overlapping corrugations, so that the

ends of the overlapping sheets shall be drawn tightly to each other. The spacing of these seam bolts

shall, not exceed 60 cm along each of the staggered rows. Holes for all bolts shall be drilled and not

punched in the ridges of the corrugations from the underside, while the sheets are on the ground.

Wind Tie: Wind ties shall be of 40 x 6 mm flat iron section or of other size as specified. These shall

be fixed at the eaves of the sheets. The fixing shall be done with the same hook bolts which secure the

sheets to the purlins. The ties shall be paid for separately unless described in the item of roofing.

Finish: The roof when completed shall be true to lines, and slopes and shall be leak proof.

Measurements:

The length and breadth shall be measured correct to a cm Area shall be worked out in sqm correct to

two places of decimal.

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The superficial area of roof covering shall be measured on the flat without allowance for laps and

corrugations. Portion of roof covering overlapping the ridge or hip etc. shall be included in the

measurements of the roof. Roof with curved sheets shall be measured and paid for separately.

Measurements shall be taken on the flat and not girthed. No deduction in measurement shall be made

for opening upto 0.4 sqm and nothing extra shall be allowed for forming such openings. For any

opening exceeding 0.4 sqm in area, deduction in measurements for the full opening shall be made and

in such cases the labour involved in making these openings shall be paid for separately. Cutting across

corrugation shall be measured on the flat and not girthed. No additions shall be made for laps cut

through.

Rate: The rate shall include the cost of all the materials and labour involved in all the operations

described above including a coat of approved steel primer and two coats of approved steel paint on

overlapping of C.G.S. sheets. This includes the cost of roof sheets, galvanised iron J or L hooks, bolts

and nuts, galvanised iron seam bolts and nuts, bitumenous and galvanised iron limpet washers etc.

RIDGES AND HIPS OF PLAIN GALVANISED STEEL SHEETS

Ridges and Hips: Ridges and hips of C.G.S. roof shall be covered with ridge and hip sections of plain

G.S. sheet with a minimum lap of 20 cm on either side over the C.G.S. sheets. The end laps of ridges

and hips and between ridges and hips shall also be not less than 20 cm. The ridges and hips shall be of

60 cm overall width plain G.S. sheet, 0.6 mm or 0.8 mm thick as given in the description of the item

and shall be properly bent in shape.

Fixing:

Ridges shall be fixed to the purlins below the same 8 mm dia G.I hook bolts and nuts and bitumen and

G.I. limpet washers which fix the Sheets to the purlins. Similarly, hips shall be fixed to the roof

members below such as purlins, hip and valley rafters with the same 8 mm dia G.I. hook bolts and

nuts and bitumen and G.I. limpet washers which fix the sheets to those roof members. At least one of

the fixing bolts shall pass through the end laps of ridges and hips, on either side. If this is not possible

extra hook bolts shall be provided. The end laps of ridges and hips shall be joined together by

galvanised iron seam bolts 25 x 6 size each with a bitumen and G.I. washer or white lead as directed

by the Officer-In-Charge. There shall be at least two such bolts in each end lap. Surface of C.G.I,

sheets of ridge and hip sections and the roofing sheets which overlap shall be painted with a coat of

approved primer and two coats of approved paint suitable for painting G.S. Sheets before they are

fixed in place.

Finish: The edges of the ridges and hips shall be straight from end to end and their surfaces should be

plane and parallel to the general plane of the roof. The ridges and hips shall fit in squarely on the

sheets.

Measurement: The measurements shall be taken for the finished work in length along the centre line

of ridge or hip, as the case may be, correct to a cm. The laps in ridges and hips and between ridges and

hips shall not be measured.

Rate: The rate shall include the cost of all labour and materials specified above, including painting,

cost of seam bolts and any extra G.I. hook bolts, nuts and washers, required.

VALLEY AND FLASHING OF PLAIN GALVANISED STEEL SHEETS

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Valley and flashing: Valley shall be 90 cm wide overall plain G.S. sheet 1.6 mm thick or other size as

specified in the item bent to shape and fixed. They shall lap with the C.G.S. sheets not less than 25 cm

width on other side. The end laps of valley shall also be not less than 25 cm. Valley sheets shall be

laid over 25 mm thick wooden boarding if so required. Flashing shall be of plain G.S. sheet of 40 cm

overall width 1.25 mm thick or 1.00 mm thick as specified in the item bend to shape and fixed. They

shall lap not less than 15 cm over the roofing sheets. The end laps between flashing pieces shall not be

less than 25cm.

Laying and Fixing: Flashing and valley sheets shall be fixed to the roof members below, such as

purlins and valley rafters with the same 8 mm dia G.I. hook bolts and nuts and bitumen and G.I.

limpet washers which fix the sheets to those roof members. At least one of the fixing bolts shall pass

through the end laps of the valley pieces on other side. If this is not possible extra hook bolts shall be

provided. The free end of flashing shall be fixed at least 5 cm inside masonary with the mortar of mix

1: 3 (1 cement : 3 coarse sand). Surface of G.S. sheets under overlaps shall be painted with a coat of

approved primer and two coats. of approved paint suitable for painting G.S. sheets.

Finish: The edges of valley and flashing should be straight from end to end. The surfaces should be

true and without bulges and and depressions.

Measurements: The length of the valleys and flashing shall be measured for the finished work correct

to a cm. The laps along the length of the valley or flashing pieces, including the portion embedded in

masonry shall not be measured.

Rates: The rate for valleys, shall be for all the labour and materials specified above, including

painting, cost of seam bolts and the cost of requisited G.I. hook bolts, nuts and washers required over

and above those needed for connecting the roof sheets to the roof members. The rate for valleys shall

exclude the cost of boarding underneath which shall be paid for separately. The rate for flashing shall

be for all the labour and materials specified above, and shall include the cost of painting and mortar

for fixing in wall.

GUTTERS OF PLAIN GALVANISED STEEL SHEETS

Gutters: Gutter shall be fabricated from plain .G. S. Sheets 1.25 mm thick or other size as specified

the item. Eaves gutters shall be of the shape and section specified in the description of the item. The

overall width of the sheet referred to therein shall mean the peripheral width of the gutter including

the rounded edges. The longitudinal edges shall be turned back to the extent of 12 mm and beaten to

form a rounded edge. The ends of the sheets at junctions of pieces shall be hooked into each other and

beaten flush to avoid leakage.

Slope: Gutter shall be laid with a minimum of 1 in 120.

Laying and Fixing:

Gutter shall be supported on and fixed to M.S flat iron brackets bent to shape and fixed to the requisite

slope. The maximum spacing of brackets shall be 1.20 metres. Where these brackets are to be fixed to

the sides of rafters, they shall be of 40 x 3 mm section and to shape and fixed rigidly to the sides of

rafters with 3 Nos. 10 mm dia bolts, nuts and washers. The brackets shall overlap the rafter not less

than 30 cm and the connecting bolts shall be at 12 cm centers. Where the brackets are to be fixed to

the purlins, the brackets shall consist of 50 x 3 mm M.S. flat iron bent to shape with one end turned at

right angle and fixed to the purlin face with 2 Nos. of 10 mm dia bolts nuts and washers. The bracket

will be stiffened by provision of 50 x 3 mm. M.S. flat whose over hung portion bent to right angle

shape with its longer leg connected to the bracket with 2 Nos. 6 mm dia M.S. bolts, nuts and washers

and its shorter leg fixed to face of purlin with 1 No. 10 mm dia, bolt, nut and washer. The overhang of

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the vertical portion of the bracket from the face of the purlin shall not exceed 22.5 cm with this

arrangement. The spacing of the brackets shall not exceed 1.20 metres. The gutter shall be fixed to the

brackets with 2 Nos. G.I. bolts and nuts 6 mm dia, each fitted with a pair of G.I. and bitumen washers.

The connecting bolts shall be above the water line of the gutters. For connection to down take pipes, a

proper drop end or funnel shaped connecting piece shall be made out of G.S. sheet of the same

thickness as gutter and riverted to the gutter, the other end tailing into the socket of the rain-water

pipe. Wherever necessary stop ends, angles etc., should be provided.

Finish: The gutters when fixed shall be true to line and slope and shall be leak proof.

Measurements: Measurements shall be taken for the finished work along the centre line of the top

width of the gutter connection to a cm. The hooked lap portion in the junctions and gutter lengths shall

not be measured. The number of brackets which are fixed to purlins with stiffener flats should be

measured.

Rate: The rate shall include the cost of all labour and materials specified above, including all specials

such as angles, junctions, drop ends or funnel shaped connecting pieces, stop ends etc., flat iron

brackets and bolts and nuts required for fixing the latter to the roof members. Brackets of 50 x 3 mm

flats fixed to purlins with surrener flats will be paid extra.

INSULATION FOR GALVALUME

This shall be as per the item no. 12.30.2 page no 353 of updated 2003, CPWD standards and

corresponding sub items.

FALSE ROOFING

This shall be as per the item no. 12.22 and 12.23 page no. 344 and 355 of updated CPWD standards

and corresponding sub items.

CLADING

This shall be as per the item no. 12.22 and 12.23 page no. 344 and 355 of updated CPWD standards

and corresponding sub items.

GLAZED TILE DADOOING

White Glazed Tiles:

The tiles shall be of approved make and shall generally conform to IS: 777. They shall be flat, and

true to shape and free from blisters crazing, chips, welts, crawling or other imperfections detracting

from their appearance. The tiles shall be tested as indicated in Appendix of IS: 777. The tiles shall be

square or rectangular of nominal size such as 150x150 mm, 100 x 100 mm, 100 x 200 mm or as

directed by the Officer-In-Charge. The thickness of the tiles shall be 5 mm, or 6 mm as specified. The

length of all four sides shall be measured correct to 0.1 mm and average length breadth shall not vary

more than ± 0.8 mm from specified dimension. The variation of individual dimension from average

value of length/breadth shall not exceed ± 0.5 mm. Tolerance in thickness shall be ± 0.4 mm.

Note 1: Where tiles of nominal sizes of 150 x 150 mm or 100 x 100 mm are not available tiles of

nominal sizes 152 mm x 152 mm or 108 mm x 108 mm may be allowed to be used with prior

approval of the Officer-In-Charge.

Note 2: The actual size of tiles supplied shall be 1 mm less so that with 1 mm joint, the tile when laid

shall conform to the nominal size. The top surface of the tiles shall be glazed and glaze shall be either

glossy or matt as specified. The underside of the tiles shall not have glaze on more than 5% of the area

in order that the tile may adhere properly to the base. The edges of the tiles shall be preferably free

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from glaze. However, any glaze if unavoidable, shall be permissible on only upto 50 per cent of the

surface area of the edges.

Coloured Tiles:

Only the glaze shall be coloured as specified. The sizes and specifications shall be the same as for the

white glazed tiles.

Decorative Tiles

The type and size of the decorative tiles shall be as follows:

i) Decorated white back ground tiles

The size of these tiles shall be 152 x 152 x 6 mm and/or 108 x 108 x 6 mm.

ii) Decorated and having coloured background

The sizes of the tiles shall be 152 x 152 x 6 mm and/or 108 x 108 x 6 mm.

Base concrete or the RCC slab on which the tiles are to be laid shall be cleaned, wetted and mopped.

The bedding for the tile shall be with cement mortar 1:3 (1 cement : 3 coarse sand) or as specified.

The average thickness of the bedding shall be 10 mm while the thickness under any portion of the tiles

shall not be less than 5 mm. Mortar shall be spread, tamped and corrected to proper levels and allowed

to harden sufficiently to offer a fairly rigid cushion for the tilt to be set and to enable the mason to

place wooden plank across and squat on it. Over this mortar bedding neat grcy cement slurry of honey

like consistency shall be spread at the rate of 3.3 kg of cement per square metre over such an area as

would accommodate about twenty tiles. Tiles shall be soaked in water washed clean and shall be fixed

in this grout on after another, each tile gently being tapped with wooden mallet till it is properly

bedded and in level with the adjoining tiles. The joints shall be kept as thin as possible and in straight

lines or to suit ths required pattern. The surface of the flooring during laying shall be frequently

checked with a straight edge about 2 m long, so as to obtain a true surface with the required slope.

Where full size tiles cannot be fix these shall be cut (sawn) to the required size, and their edge rubbed

smooth to ensure straight and true joints. Tiles which are fixed in the floor adjoining the wall shall

enter not less than 10 mm under the plaster, skirting or dado. After tiles have been laid surplus cen

slurry shall be cleaned off.

Pointing and Finishing:

The joints shall be cleaned off the grey cement slurry with wire/coir brush or trowel to a depth 2 mm

to 3 mm and all dust and loose mortar removed. Joints shall then be flush pointed with white cement

added with pigment if required match the colour of tiles. The floor shall then be kept wet for 7 days.

After curing, the surface shall kept be washed and finished clean. The finished floor shall not sound

hollow when tapped with a wooden mallet.

Measurements:

Length and breadth shall be measured correct to a cm before laying skirting, dado or wall plaster and

the area calculated in square metre correct to two places of decimal. Where coves are used at the

functions, the length and breadth shall be measured between the lower edges of the coves. No

deduction shall be made nor extra paid for voids not exceeding 0.20 square metre. Deductions for

ends of dissimilar materials or other articles embedded shall not be made for areas not exceeding 0.10

square metre. Areas, where glazed tiles or different types of decorative tiles are used will be measured

separately.

Rate:

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The rate for flooring shall include the cost of all materials and labour involved in all the operations

described above. Nothing extra shall be paid for the use of cut (sawn) tiles in the work. Extra over and

above the normal rate for white shall be paid where coloured or any other type of decorative tiles have

been used.

FINISHING

CEMENT

PLASTERING

The cement plaster shall be 12 mm, 15 mm or 20 mm thick as specified in the item.Scaffolding and

preparation of surface shall be as specified in the specifications.

Mortar: The mortar of the specified mix using the type of sand described in the item shall be used. It

shall be as specified in 3.5. For external work and under coat work, the fine aggregate shall conform

to grading IV. For finishing coat work the fine aggregate conforming to grading zone V shall be used.

Thickness: Where the thickness required as per description of the item is 20 mm the average thickness

of the plaster shall not be less than 20 mm whether the wall treated is of brick or stone. In the case of

brick work, the minimum thickness over any portion of the surface shall be not less than 15 mm while

in case of stone work the minimum thickness over the bushings shall be not less than 12 mm.

Curing: Curing shall be started as soon as the plaster has hardened sufficiently not to be damaged

when watered. The plaster shall be kept wet for a period of at least 7 days. During this period, it shall

be suitably protected from all damages at the contractor's expense by such means as the Officer-In-

Chargemay approve. The dates on which the plastering is done shall be legibly marked on the various

sections plastered so that curing for the specified period thereafter can be watched.

CEMENT PLASTER WITH A FLOATING COAT OF NEAT CEMENT

The cement plaster shall be 12, 15 or 20 cm thick, finished with a floating coat of neat described in the

item. Specifications for this item of work shall be as same as described in the manual except for the

additional floating coat, which shall be carried out as below When the plaster has been brought to a

true surface with the wooden straight edge it shall be uniformly treated over its entire area with a paste

of neat cement and rubbed smooth, so that the whole surface is covered with neat cement coating. The

quantity of cement applied for floating coat shall be 1 kg per sqm. Smooth finishing completed with

trowel immediately and in no case later than half an hour of adding water to the plaster mix.

18 mm CEMENT PLASTER (TWO COAT WORK)

The specification for scaffolding preparation of surface shall be as described.

Mortar: The mix and type of fine aggregate specified in the description of the item shall for the

respective coats. It shall be as specified in 3.2.2. Generally the mix of the finishing coat shall not be

richer than the under coat unless otherwise described in item. Generally coarse sand shall be used for t

coat and fine sand for the finishing coat otherwise specified for external work and coat work, the fine

aggregate shall conform to zone IV. For finishing coat work the fine a conforming to grading zone V

shall be used.

Application:

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The plaster shall be applied in two 12 mm under coat and then 6 mm finishing shall have an average

total thickness of not 18 mm.

12 mm Under Coat : This shall be as specified except that when the, has been brought to a true surface

a wooden edge and the surface shall be left rough and furrowed 2mm deep with a scratching tool

diagonally both ways, to form key for the finishing coat. The surface shall be kept wet till the

finishing coat is applied

6 mm finishing coat: The finishing coat shall be applied after the under coat has sufficiently, set but

not dried and in any case within 48 hours and finished in the manner specified.

6 mm CEMENT PLASTER ON CEMENT CONCRETE AND REINFORCED CEMENT

CONCRETE WORK.

Scaffolding Stage scaffolding shall be provided for the work. This shall be independent of the walls.

Preparation of Surface: Projecting burrs of mortar formed due to the gaps at joints in shuttering shall

be removed. The surface shall be scrubbed clean with wire brushes. In addition concrete surfaces to be

plastered shall be pock marked with a pointed tool, at spacing of not more than 5 cm. centres, the pock

being made not less than 3 mm deep. This is to ensure a proper key for the plaster. The mortar shall be

washed off and surface, cleaned of all oil, grease etc. and well wetted before the plaster is applied.

Mortars: Mortar of the specified mix using types of sand described in the item shall be used.

Application: To ensure even thickness and a true surface, gauges of plaster 15 x 15 cm. shall be first

applied at not more than 1.5 m intervals in both directions to serve as guides for the plastering.

Surface of these gauged areas shall be truly in the plane of the finished plaster surface. The plaster

shall be then applied in a uniform surface to a thickness slightly more than the specified thickness and

shall then be brought to true and even surface by working a wooden straight edge reaching across the

gauges. Finally the surface shall be finished true with a trowel or with wooden float to give a smooth

or sandy granular texture as required. Excess troweling or over working of the floats shall be avoided.

The plastering and finishing shall be completed within half an hour of adding water to the dry mortar.

Plastering of ceiling shall not be commenced until the slab above has been finished and centering has

been removed. In the case of ceiling of roof slabs, plaster shall not be commenced until the terrace

work has been completed. These precautions are necessary in order that the ceiling plaster is not

disturbed by the vibrations set up in the above operations.

Finish: The plaster shall be finished to a true and plumb surface and to the proper degree of

smoothness as required. The work shall be tested as the work precedes with a true straight edge not

less than 2.5 m long and with plumb bobs. All horizontal lines and surfaces shall be tested with a level

and all jambs and corners with a plumb bob as work proceeds.

Thickness: The average thickness of plaster shall not be less than 6 mm. The minimum thickness over

any portion of the surface shall not be less than 5 mm.

Curing: The specifications shall be as detailed in the manual.

Measurements:

Length and breadth shall be measured correct a cm. and its area shall be calculated in sqm. correct to

two places of decimal. Dimensions before plastering shall be taken. Thickness of plaster shall be

exclusive of the thickness of the key i.e. depth or rock marks and hacking. Plastering on ceiling at

height greater than 5 m above the corresponding floor level shall be so described and shall be

measured separately stating the height in stages of 1 m or part thereof. Plastering on the sides and

soffits of the projected beams of ceiling at a height greater than 5 m above the corresponding floor

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level shall be measured and added to the quantity measured. Plastering on spherical and groined

ceiling and circular work not exceeding 6 m in radius, shall be measured and paid for separately.

Flowing soffits (viz. portion under spiral stair case etc.) shall be measured and paid for separately.

Ribs and mouldings on ceiling shall be measured as for cornices, deductions being made from the

plastering on ceiling in case the width of the moulding exceed 15 cm. Exterior plastering at a height

greater than 10 m from average ground level shall be measured separately in each storey height. Patch

plastering (in repairs) shall be measured as plastering new work, where the patch exceed 2.5 sqm.

extra payment being made for preparing old wall, such as dismantling old plaster, raking out the joints

and cleaning the surface. Where the patch does not exceed 2.5 sqm in area it shall be measured under

the appropriate item under sub head 'Repairs to Buildings.Deduction shall not be made or openings or

for ends of columns, or columns caps of 0.5 sqm and in area and under. No additions will be made

either for the plastering of the sides of such openings. For openings etc. of areas exceeding 0.5 sqm

deduction will be made for the full opening but the sides of such openings shall be measured for

payment.

Rate: The rate shall include the cost of all labour and materials involved in all the operations described

above.

6 mm CEMENT PLASTER FOR SLAB BEARING

Cement plaster shall be 6 mm thick finished with a floating coat of neat cement and thick coat of lime

wash on top of walls for bearing of slabs.

Application: The plaster shall be applied over the cleaned and wetted surface of the wall. When the

plaster has been brought to a true surface with the wooden straight edge it shall be uniformly treated

over its entire area with a paste of neat cement and rubbed smooth, so that the whole surface is

covered with neat cement coating. The quantity of cement applied for floating coat shall be 1 kg per

sqm. Smooth finishing shall be completed with trowel immediately and in no case later than half an

hour of adding water to the plaster mix.

Lime wash: This shall be applied in a thick coat after curing the plaster for three days.

Measurements: Length and breadth shall be measured correct to a cm and area worked out in sq.m

correct to two places of decimal.

Rate: The rate shall include the cost of all labour and materials involved in all the operations described

above.

COLOUR WASHING

The mineral colours, not affected by lime, shall be added to white, wash. Indigo (Neel) shall however,

not be added. No colour wash shall be done until a sample of the colour wash of the required tint or

shade has been got approved from the Officer-In-Charge. The colour shall be of even tint or shade

over the whole surface. If it is blotchy or otherwise badly applied, it shall be redone by the contractor.

For new work, the priming coat shall be of white ash with lime or with whiting as specified in the

description of the item. Two or more coats, shall then be applied on the entire surface till it represents

a smooth and uniform finish. The finished dry surface shall not and shall not readily come off on the

rubbed.

DRY DISTEMPERING

Materials: Dry distemper of required colour (IS: 427) and of approved brand and manufacture shall be

used. The shade shall be got approved from the Officer-In-Chargebefore application of distemper. The

dry distemper colour as required shall be stirred slowly in clean water using 6 decilitres (0.6 litre) of

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water per kg of distemper as specified by the makers. Warm water shall preferably be used. It shall be

allowed to stand at least 30 minutes (or if practicable overnight) before use. The mixture shall be well

stirred before and during use to maintain an even consistency. Distemper shall not be mixed in larger

quantity than is actually required for one day's work.

Preparation of Surface:

Before new work is distempered, the surface shall be thoroughly brushed free from mortar droppings

and other foreign matter and sand papered smooth. New plastered surfaces shall be allowed to dry for

at least two months, before applying distemper. In the case of old work, all those pieces and scales

shall be removed by sand papering. The surface shall be cleaned of all grease, dirt, etc. Pitting in

plaster shall be made good plaster of Paris mixed with the colour to be used. The surface shall then be

rubbed down again with fine grade sand paper and made smooth. A coat of the distemper shall be

applied over the patches. The patched surface shall be allowed to dry thoroughly before the regular

coat of distemper is applied.

Priming Coat: A priming coat of whiting shall be applied over the prepared surface in case of new

work, if so stipulated in the description of the item. No white washing coat shall be .used as a priming

coat for distemper. The treated surface be allowed to dry before distemper coat is given.

Application:

In the case of new work, the treatment shall consist of a priming coat, of whiting followed by the

application of two or more coats of distemper till the surface shows an even colour.

The application of each coat shall be as follows:

The entire surface shall be coated with the mixture uniformly, with proper distemper brushes ordinary

white wash brushed shall not be allowed) in horizontal strokes followed immediately by vertical ones

which together shall constitute one coat. The subsequent coats shall be applied only after the previous

coat has dried. The finished surface shall be even and uniform and shall show no brush marks. Enough

distemper shall be mixed to finish one room at a time. The application of a coat in each room shall be

finished in one operation and no work shall be started in any room, which cannot be completed the

same day. After each day's work, the brushes shall be washed in hot water and hung down to dry. Old

brushes which are dirty or caked with distemper shall not be used.

OIL EMULSION (OIL BOUND) WASHABLE DISTEMPERING

Materials: Oil emulsion (Oil Bound) washable distemper (IS-428) of approved brand and manufacture

shall be used. The primer where used as on new work shall be cement primer or distemper primer as

described in the item. These shall be of the same manufacture as distemper. The distemper shall be

diluted with water or any other prescribed thinner in a manner recommended by the manufacturer.

Only sufficient quantity of distemper required for day’s work shall be prepared. The distemper and

primer shall be brought by the contractor in sealed tins in sufficient quantities at a time to suffice for a

fortnight's work, and the same shall be. kept in the joint custody of the contractor, and the Officer-In-

Charge. The empty tins shall not be removed from the site of work till this item of work has been

completed and passed by the Officer-In-Charge.

Preparation of the Surface:

For new work the surface shall be thoroughly cleaned of dust, old white or colour wash by washing

and scrubbing. The surface shall then be allowed to dry for at least 48 hours. It shall then be sand

papered to give a smooth and even surface. Any unevenness shall be made good by applying putty,

made of plaster of pairs mixed with water on the entire surface including filling up the undulations

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and then sand papering the same after it is dry. In the case of old work, all loose pieces and scales

shall be removed by sand papering. The surface shall be cleaned of all grease dirt etc. Pitting in plaster

shall be made good with plaster of Paris mixed with the colour to be used. The surface shall then be

rubbed down again with a fine grade sand paper and made smooth. A coat of the distemper shall be

applied over the patches. The patched surface shall be allowed to dry thoroughly before the regular

coat of distemper is applied.

Application:

Priming Coat: The priming coat shall be with distemper primer or cement primer, as required in the

description of the item. The application of the distemper primer shall be as described in General

Specifications.

Note: If the wall surface plaster has not dried completely, cement primer shall be applied before

distempering the walls. But if distempering is done after the wall surface is dried completely,

distemper primer shall be applied. Oil bound distemper is not recommended to be applied, within six

months of completion of wall plaster. However, newly plastered surface if required to be distempered

before a period of six months shall be given a coat of alkali resistant priming paint conforming to IS:

109 and allowed to dry for at least 48 hours before distempering is commenced.

Distemper Coat: For new work, after the primer coat has dried for at least 48 hours, the surface shall

be lightly sand papered to make it smooth for receiving the distemper, taking care not to rub out the

priming coat. All loose particles shall be dusted off after rubbing. One coat of distemper properly

diluted with thinner (water or other liquid as stipulated by the manufacturer) shall be applied with

brushes in. horizontal strokes followed immediately by vertical ones which together constitutes one

coat. The subsequent coats shall be applied in the same way. Two or more coats of distemper as are

found necessary shall be applied over the primer coat to obtain an even shade. A time interval of at

least 24 hours shall be allowed between successive coats to permit proper drying of the preceding

coat.

Rate: The rate shall include the cost of all labour and materials involved in all the above operations

(including priming coat) described above.

CEMENT PRIMER COAT

Cement primer coat is used as a base coat on wall finish of cement surfaces before oil emulsion

distemper paints are applied on them. The cement primer is composed of a medium and pigments

which are resistant to the alkalies present in the cement lime or lime cement in wall finish and

provides a barrier for the protection of subsequent coats of oil emulsion distemper paints. Primer coat

shall be preferably applied b brushing and not by spraying. Hurried priming shall be avoided

particularly on absorbent surfaces. New plaster patches in old work should also be treated with cement

primer before applying oil emulsion paints etc.

Preparation of the Surface: The surface shall be thoroughly cleaned of dust, old white or colour wash

by washing and scrubbing. The surface shall then be allowed to dry for at least 48 hours. It shall then

be sand papered to give a smooth and eve surface. Any unevenness shall be made good by applying

putty, made of plaster of Paris mixed with water on the entire surface including filling up the

undulations and then sand papering the same after it is dry.

Application: The cement primer shall be applied with a brush on the clean dry and smooth surface.

Horizontal strokes shall be given first and vertical strokes shall be applied immediately afterwards.

This entire operation will constitute on coat. The surface shall be finished as uniformly possible

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leaving no brush marks. It shall be allowed to dry for at least 48 hours, before oil emulsion paint is

applied.

CEMENT PAINT

Material: The cement paint shall be (conforming to IS: 5410) of approved brand and manufacturer.

The cement paint shall be brought to site work by the contractor is its original containers sealed

condition. The material shall be brought in a time in adequate quantities to suffice for the whole work

or at least a fortnight’s work. The materials shall be kept in the joint custody of the Contractor and the

Officer-In-Charge. The empties shall be removed from the site of work till the work till the relevant

item of the work has been completed and permission obtained from the Officer-In-Charge.

Preparation of Surface: For New York, the surface shall be thoroughly cleaned of all mortar dropping,

dirt dust, alge, grease and other foreign matter by brushing and washing. Ptting in plaster shall be

made good and a coat of water proof cement paint shall be applied over patches after wetting them

thoroughly.

Preparation of mix : Cement paint shall be mixed in such quantities as can be used up within an hour

of its mixing as otherwise the mixture will set and thicken, affecting flow and finish. Cement paint

shall be mixed with water in two stages. The first stage shall comprise of 2 parts of cement paint and

one part of water stirred thoroughly and allowed to stand for 5 minutes. Care shall be taken to add the

cement paint gradually to the water and not vice versa. The second stage shall comprise of adding

further one part of water to the mix and stirring thoroughly to obtain a liquid of workable and uniform

consistency. In all cases the manufacturer's instruction shall be followed meticulously. The lids of

cement paint drums shall be kept tightly closed when not in use, as by exposure to atmosphere the

cement paint rapidly becomes air set due to its hygroscopic qualities. In case of cement paint brought

in gunny bags, once the bag is opened, the contents should be consumed in full on the day of its

opening. If the is not likely to be consumed in full, the balance quantity should be transferred and

preserved in an airtight container to avoid its exposure to atmosphere.

Application:

The solution shall be applied on the clean and wetted surface with brushes or spraying machine. The

solution shall be kept well stirred during the period of application. It shall be applied on the surface

which is on the shady side of the building so that the direct heat of the sun on the surface is avoided.

The method of application of cement paint shall be as per manufacturer's specification. The completed

surface shall be watered after the day's work. The second coat shall be applied after the coat has been

set for at least 24 hours. Before application of the second or subsequent coats, the surface of the

previous coat shall not be wetted. For new work the shall be treated with three or more coats of water

proof cement paint as found necessary to get a uniform shade. For old work, the treatment shall be

with one or more coats as found necessary, to get a uniform shade.

Precaution : Water proof cement paint shall not be applied on surfaces already treated with white

wash, colour wash, distemper dry or oil bound, varnishes, paints etc. It shall not be applied on

gypsums, wood and metal surfaces. If Water Proof Cement Paint is required to be applied on existing

surfaces previously treated with white wash, colour wash etc, the surface shall be thoroughly cleaned

by scrapping off all the white wash, colour wash etc., completely. Thereafter a coat of cement primer

shall be applied followed by two or more coats of water proof cement paint.

PAINTING

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Materials: Paints, oils, varnishes etc. of approved brand and manufacture shall be used. Only ready

mixed paint (Exterior grade) as received from the manufacturer without any admixture shall be used.

If for any reason, thinning is necessary in case of ready mixed paint, the brand of thinner

recommended by the manufacturer or as instructed by the Officer-In-Chargeshall be used. Approved

paints, oil or varnishes shall be brought to the site of work by the contractor in their original

containers in sealed condition. The material shall be brought in at a time in adequate quantities to

suffice for the whole work or at least a fortnight's work. The materials shall be kept in the joint

custody of the contractor and the Officer-In-Charge. The empties shall not be removed from the site of

work, till the relevant item of work has been completed and permission obtained from the Officer-In-

Charge.

Commencing Work: Painting shall not be started until the Officer-In-Chargehas inspected the items of

work to be painted, satisfied himself about their proper quality and given his approval to commence

the painting work. Painting of external surface should not be done in adverse weather condition like

hail storm and dust storm. Painting, except the priming coat, shall generally be taken in hand after

practically finishing all building work. The rooms should be thoroughly swept out and the entire

building cleaned up, at least one day in advance of the paint work being started.

Preparation of Surface: The surface shall be thoroughly cleaned and dusted off. All rust, dirt, scales,

smoke splashes, mortar droppings and grease shall be thoroughly removed before painting is started.

The prepared surface shall have received the approval of the Officer-In-Chargeafter inspection, before

painting is commenced.

Application:

Before pouring into smaller containers for use, the paint shall be stirred thoroughly in. its containers,

when applying also, the paint shall be continuously stirred in the smaller containers so that its

consistency is kept uniform. The painting shall be laid on evenly and smoothly by means of crossing

and laying off, the latter in the direction of the grains of wood. The crossing and laying off consists of

covering the area over with paint, brushing the surface hard for the first time over and then brushing

alternately in opposite direction, two or three times and then finally brushing lightly in a direction at

right angles to the same. In this process, no brush marks shall be left after the laying off is finished.

The full process of crossing and laying off will constitute one coat. Where so stipulated, the painting

shall be done by spraying. Spray machine used may be (a) high pressure (small air aperture) type, or

(b) a low pressure (large air gap) type, depending on the nature and location of work to be carried out.

Skilled and experienced workmen shall be employed for this class of work. Paints used shall be

brought to the requisite consistency by adding a suitable thinner. Spraying should be done, only, when

dry condition prevails. Each coat shall be allowed to dry out thoroughly and rubbed smooth before,

the next coat is applied. This should be facilitated by thorough ventilation. Each coat except the last

coat, shall be lightly rubbed down with sand paper or fine pumice stone and cleaned off dust before

the next coat is laid. No left over paint shall be put back into the stock tins. When not in use, the

containers shall be kept properly closed. No hair marks from the brush or clogging of paint puddles in

the corners of panels, angles mouldings etc. shall be left on the work. In painting doors and windows,

the putty round the glass panes must also be painted but care must be taken to see that no paint stains

etc. are left on the glass. Tops of shutters and surfaces in similar hidden locations shall not be left out

in painting. However, bottom edge of the shutters where the painting is not practically possible, need

not be done nor any deduction on this account will be done but two coats of primer of approved make

shall be done on the bottom edge before fixing the shutters. On painting steel work, special care shall

be taken while painting over bolts, nuts, rivets overlaps etc. The additional specifications for primer

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and other coats of paints shall be as according to the detailed specifications under the respective

headings.

Brushes and containers: After work, the brushes shall be completely cleaned of paint and linseed oil

by rinsing with turpentine. A brush in which paint has dried up is ruined and shall on no account be

used for painting work. The containers when not in use, shall be kept dosed and free from air so that

paint does not thicken and also shall be kept safe from dust. When the paint has been used, the

containers shall be washed with turpentine and wiped dry with soft clean cloth, so that they are clean,

and can be used again.

Measurements:

The length and breadth shall be measured correct to a cm. The area shall be calculated in sqm(correct

to two places of decimal), except otherwise stated. Small articles not exceeding 10 sq. decimeter (0.1

sqm) of painted surfaces where not in conjunction with similar painted work shall be enumerated.

Painting upto 10 cm in width or in girth and not in conjunction with similar painted work shall be

given in running metres and shall include cutting to line where so required.

Note: Components of trusses, compound girders, stanchions, lattices and similar work shall, however,

be given in sq. metres irrespective of the size or girth of members. Priming coat of painting shall be

included in the work of fabrication.

In measuring painting, varnishing, oiling etc. of joinery and steel work etc. The coefficients as

indicated in following tables shall be used to obtain the area payable. The coefficients shall be applied

to the areas measured flat and not girthed.

TABLE 9.8 EQUIVALENT PLAIN AREAS OF UNEVEN SURFACE

S. No Description of work How measured Multiplying

coefficients

I WOOD WORK DOORS, WINDOWS

ETC

1 Panelled or framed and braced doors,

windows etc.

Measured flat (not

girthed including)

1.30 (for each

side)

2

Ledged and battened or ledged, battened

and braced doors, windows etc.

Chowkhat or

frame, Edges

chocks, cleats, etc.

shall be deemed to

be included in the

item.

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3

Flush doors etc. -do- 1.20 (for each

side)

4 Part panelled and part glazed or gauzed

doors, window

-do-

1.00 (for each

side) etc. (Excluding painting of wire gauze

portion)

5 Fully glazed or gauzed doors, windows

etc. (Excluding -do-

0.80 (for each

side)

painting of wire gauze portion)

6 Fully venationed or louvered doors,

windows etc. -do-

1.80 (for each

side)

7

Trellis (or Jaffri) work one way or two

way

Measured flat

overall, no

deduction shall be

made for open

spaces, supporting

members shall not

be measured

separately

2 (for painting all

over)

8 Carved or enriched work Measured flat 2 (for each side)

9

Weather boarding

Measured flat (not

girthed supporting

frame work shall

not be measured

separately

1.20 (for each

side)

10 Wood shingle roofing

Measured flat (not

girthed)

1.10 (for each

side)

11 Boarding with cover fillets and match

boarding

Measured flat (not

girthed)

1.05 (for each

side)

12

Tile and slate battening

Measured flat

overall no

deductions shall be

made for open

spaces

0.80 (for painting

all over)

II. STEEL WORK DOORS, WINDOWS

ETC.

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13

Plain sheeted steel doors or windows

Measured flat (not

girthed) including

frame edges etc.

1.10 (for each

side)

14 Fully glazed or gauzed steel doors and

windows (excluding painting of wire

gauze portion)

-do-

0.50 (for each

side)

15 Partly panelled and partly glazed or

gauzed doors and windows (excluding

painting of wire gauze portion)

-do-

0.80 (for each

side)

16 Corrugated sheeted steel doors or

windows -do-

1.25 (for each

side)

17 Collapsible gates Measured flat

1.50 (for painting

all over)

18

Rolling shutters of interlocked laths

Measured flat,

(size of opening)

all

1.10 (for each

side)

over; jamb guides,

bottom rails and

locking

arrangement etc.

shall be included in

the item (top cover

shall be measured

separately)

III GENERAL

19 Expanded metal, hard drawn steel wire

fabric of

Measured flat

overall; no

deduction shall be

made for open

spaces; supporting

members shall not

be measured

separately

1 (for paint all

over) approved quality, grill works and

gratings in guard Bars, balustrades,

railing partitions and MS Bars in

windows frames.

20 Open palisade fencing and gates

including -do- (see note No.

12)

1 (for paint all

over) standards, braces, rails stays etc in

timber or steel

21 Corrugated iron sheeting in roofs, side -do- Measured flat 1.14 (for each

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cladding etc. (not girthed) side)

22 AC corrugated sheeting in roofs, side

cladding etc. -do-

1.20 (for each

side)

23 AC semi corrugated sheeting in roofs,

side cladding -do-

1.10 (for each

side)

etc. or Nainital pattern using plain sheets

24 Wire gauze shutters including painting

of wire gauze -do-

1.00 (for each

side)

Explanatory notes for Table 9.14

1) Measurements for doors windows etc., shall be taken flat (and not girthed) over all including

Chowkhats or frames, where provided. Where Chowkhats or frames are not provided, the shutter

measurements shall be taken.

2) Where doors, windows etc., are of composite types other than those included in Table 9.14 the

different portion shall be measured separately with their appropriate coefficients, the centre line of the

common rail being taken as the dividing line between the two portions.

3) The coefficients for door and windows shall apply irrespective of the size of frames and shutter

members.

4) In case steel frames are used the area of doors, windows shutters shall be measured flat excluding

frames.

5) When the two faces of a door, window, etc. are to be treated with different specified finishes,

measurable under separate items, the edges of frames and shutters shall be treated with the one or the

other type of finish as ordered by the Officer-In-Chargeand measurement of this will be deemed to be

included in the measurement of the face treated with that finish.

6) In the case where shutters are fixed on both faces of the frames, the measurement for the door

frame and shutter on one face shall be taken in the manner already described, while the additional

shutter on the other face will be measured for the shutter only excluding the frame.

7) Where shutters are provided with clearance at top or/and bottom each exceeding 15 cm height, such

openings shall be deducted from the overall measurements and relevant coefficient shall be applied to

obtain the area payable.

8) Collapsible gates shall be measured for width from outside to outside of gate in its expanded

position for height from bottom to top of channel verticals. No separate measurements shall be taken

for the top and bottom guide rails rollers, fittings etc.

9) Coefficients for sliding doors shall be the same as for normal types of doors in the table.

Measurements shall be taken outside to outside of shutters, and no separate measurements shall be

taken for the painting guide rails, rollers, fittings etc.

10) Measurements of painting as above shall be deemed to include painting all iron fittings in the

same or different shade for which no extra will be paid.


11) The measurements of guard bars, expanded metal, hard drawn steel wire fabric of approved

quality, grill work and gratings, when fixed in frame work, painting of which is once measured

elsewhere shall be taken exclusive of the frames. In other cases the measurements shall be taken

inclusive of the frames.

(12) For painting open palisade fencing and gates etc., the height shall be measured from the bottom

of the lowest rail, if the palisades do not go below it, (or from the lower end of the palisades, if they

project below the lowest rail), upto the top of rails or palisades whichever are higher, but not up to the

top of standards when the latter are higher than the top mils or the palisades. Width of moulded work

of all other kinds, as in hand rails, cornices, architraves shall be measured by girth. For trusses,

compound girders, stanchions, lattice girders, and similar work, actual areas will be measured in sq.

metre and no extra shall be paid for painting on bolt heads, nuts, washers etc. even when they are

picked out in a different tint to the adjacent work. Painting of rain water, soil, waste, vent and water

pipes etc. shall be measured in running metres of the particular diameter of the pipe concerned.

Painting of specials such as bends, heads, branches, junctions, shoes, etc. shall be included in the

length and no separate measurements shall be taken for these or for painting brackets, clamps etc.

Measurements of wall surfaces and wood and other work not referred to already shall recorded as per

actual. Flag staffs, steel chimneys, aerial masts, spires and other such objects requiring special

scaffolding shall be measured separately.

Precautions: All furniture, fixtures, glazing, floors etc. shall be protected by covering and stains,

smears, splashings, if any shall be removed and any damages done shall be made good by the

contractor at his cost.

Rate: Rates shall include cost of all labour and materials involved in all the operations described

above and in the particular specifications given under the several items.

PAINTING PRIMING COAT ON WOOD, IRON OR PLASTERED SURFACES

Primer:

The primer for wood work, iron work or plastered surface shall be as specified in the description of

item. Primer for plaster/wood work/Iron & Steel/Aluminium surfaces shall be as specified below:

TABLE 9.9 Details of Primer and surfaces

Sl. No Surfaces Primer to be used

1. Wood work (hard and soft wood) Pink conforming to IS: 3536

2. Resinour wood and plywood Aluminium primer conforming to

IS: 3585

3. (A) Aluminium and light alloys Zinc chromate primer confirming

to IS: 104

(B) Iron, Steel and Galvanized steel

Red Oxide Zinc chromate Primer

conforming to IS: 2074

4. Cement/Conc/RCC/brick work. Cement primer conforming to IS :

Plastered surfaces, asbestos surfaces 109

to receive Oil bound distemper or


paint finish


The primer shall be ready mixed primer of approved brand and manufacture. Where primer for wood

work is specified to be mixed at site, it shall be prepared from a mixture of red lead, white lead and

double boiled linseed oil in the ratio of 0.7 kg : 0.7 kg : 1 litre. Where primer for steel work is

specified to be mixed at site, it shall be prepared from a mixture of red lead, raw linseed oil and

turpentine in the ratio of 2.8 kg 1 litre : 1 litre.

The specifications for the base vehicle and thinner for mixed on site primer shall be as follows:

(a) White Lead: The White lead shall be pure and free from adulterants like barium sulphate and

whiting. It shall conform to IS: 103.

(b) Red Lead: This shall be in powder form and shall be pvire and free from adulterants 1 brick dust

etc. It shall conform to IS: 102.

(c) Raw Linseed Oil: Raw linseed oil shall be lightly viscous but clear and of yellowish colour with

light brown tinge. Its specific gravity at a temperature of 30 degree C shall be between 0.923 and

0.928.

Note: The oil shall be mellow and sweet to the taste with very little smell. The oil shall be of

sufficiently matured quality. Oil turbid or thick, with acid and bitter taste and rancid odour and which

remains sticky for a considerable time shall be rejected. The oil shall conform in all respects to IS: 75.

The oil shall be of approved brand and manufacture.

(d) Double boiled linseed oil: This shall be more viscous than the raw oil, have a deeper colour and

specific gravity between 0.931 /and 0.945 at a temperature of 30 degree C. It dry with a glossy

surface. It shall confirm in all respects to IS: 77. The oil shall be of approved brand and manufacture.

(e) Turpentine: Mineral turpentine i.e. petroleum distillate which has the same rate of evaporation as

vegetable turpentine (distillate product of oleeresin of conifers) shall be used. It shall have no grease

or other residue when allowed to evaporate. It shall conform to IS: 533.

All the above materials shall be of approved manufacture and brought to site in their original packing

in sealed condition.

Preparation of surface:

Wooden surface: The wood work to be painted shall be dry and free from moisture. The surface shall

be thoroughly cleaned. All unevenness shall be rubbed down smooth with sand paper and shall be

well dusted. Knots, if any shall be covered with preparation of red lead made by grinding red lead in

water and mixing with strong glue sized and used hot. Appropriate filler material conforming to IS:

345 with same shade as paint shall be used where specified. The surface treated for knotting shall be

dry before paint is applied. After obtaining approval of Officer-In-Chargefor wood work, the priming

coat shall be applied before the wood work is fixed in position. After the priming coat is applied, the

holes and indentation on the surface shall be stopped with glazier's putty or wood putty see 9.33 and

13.37.1 respectively. Stopping shall not be done before the priming coat is applied as the wood will

absorb the oil in stopping and the latter is therefore liable to crack.

Iron & Steel Surface: All rust and scales shall be removed by scrapping or by brushing with steel wire

brushes. Hard skin of oxide formed on the surface of wrought iron during rolling which becomes

loose by rusting, shall be removed. All dust and dirt shall be thoroughly wiped away from the surface.

If the surface is wet, it shall be dried before priming coat is undertaken.

Plastered Surface: The surface shall ordinarily not be painted until it has dried completely. Trial

patches of primer shall be laid at intervals and where drying is satisfactory, paint shall then be taken in


hand. Before primer is applied, holes and undulations, shall be filled up with plaster of paris and

rubbed smooth.

Application: The primer shall be applied with brushes, worked well into the surface spread even and

smooth. Treatment on Steel for Aggressive Environment. A second coat of ready mixed red oxide/

zinc chromate primer may be applied where considered necessary in aggressive environment such as

near Industrial Establishment and Coastal regions where the steel members are prone to corrosion.

The second coat (which shall be paid for separately) is to be applied after placing the member in

position and just before applying paint. The second coat of primer is not necessary in case of painting

with synthetic enamel paint as it is applied over an under coat of ordinary paint.

PAINTING WITH READY MIXED PAINT

Ready mixed paints of approved brand and manufacture and of the required shades shall be used.

They shall conform in all respects to relevant IS Specifications.

Painting on New Surface: The surface which has not been painted earlier or the paint had been

removed by paint remover, burning, caustic soda etc. shall be considered to be new surface.

Preparation of Surface:

(a) Wood Work: The surface shall be cleaned and all unevenness removed. Knots if visible, shall be

covered with a preparation, of red lead. Holes and indentations on the surface shall be filled in with

glazier s putty or wood putty conforming to IS: 419 and rubbed smooth before painting is done. The

surface should be thoroughly dry before painting.

(b) Iron and Steel Work: The priming coat shall have dried up completely before painting is started.

Rust and scaling shall be carefully removed by scraping or by brushing with steel wire brushes. All

dust and dirt shall be carefully and thoroughly wiped away.

(c) Plastered surface: The priming coat shall have dried up completely before painting is started. All

for dirt that has settled on the priming coat shall be thoroughly wiped away before painting is started.

Application: The number of coats to be applied will be as stipulated in the item. The painted surface

shall present a uniform appearances and glossy finish, free from streaks blisters etc.

Painting on old surface: The surface which has been painted earlier shall be considered to be old

surface

Preparation of surface

(a) Wood work: If the old paint is sound and firm Its removal is considered unnecessary, the surface

shall be rubbed down with pumice stone after it has been cleaned of all smoke and grease by washing

with lime and rinsing with water and drying. All dust and loose paint shall be completely removed.

The surface shall then be washed with soap and water. If the old painted surface is blistered or flaked

badly old paint shall be completely removed and such removal shall be paid for separately. Holes and

cracks if any shall be stopped with glazier's putty or wood putty conforming to IS: 419. Further the

painting itself shall be treated as on new surface and paid for, accordingly.

(b) Iron and Steel Work: If the old paint is sound and firm and its removal is considered unnecessary,

it shall be rubbed with wire brushes and any loosened paint taken off. All dust shall then be

thoroughly wiped away. The surface shall then be wiped finally with mineral turpentine to remove

grease and perspiration of hand marks etc. and then allowed to dry.


If the old painted surface is in bad condition and blistered and flaked, the old paint shall be completely

removed and the surface prepared. Such removal shall be paid for separately. The painting including

the priming coat shall be treated as on new work and paid for accordingly.

(c) Plastered surface: It shall be as specified for wood work. If before painting any portion of the wall

shows signs of dampness, the causes shall be investigated and the damp surface shall be properly

treated. Such treatment shall be paid for separately. A thin coat of white lead if so required shall be

applied on the wet or patchy portion of the surface before painting is undertaken and this shall be paid

extra.

Application: The number of coats to be given shall be as stipulated in the description of the item.


Construction works of 1 no Common Facility Building (CFC) & 2 No of village level Workshed

(Spoke) Units including all internal electrification, plumbing & sanitary installation works at

Baghara Panchayat (Gunamora no. 2, Tengaguri & Charaihagi Village in Morigaon District ,

Assam under SFURTI Project



ICCo, Guwahati

Volume III – Bill of Quantities & Drawings



Guwahati. New Delhi


Terms and conditions

i. Validity: The project shall be completed within a period of 6 months

ii. The firm shall arrange the necessary accommodation and stay facilities for their personnel involved

in the work at the site

iii. Transportation charges towards bringing the equipments to the site should be borne by the firm.

iv. All necessary taxes should be borne by the firm.















1. Civil Work Estimate – CFC








2. Electrical estimate – CFC

























