LADAKH AUTONOMOUS HILL DEVELOPMENT …ladakhenergy.org/wp-content/uploads/2011/07/Bogdang-Tender... · Silt Ejector type = Rectangular cover with perforated precast slab. ix. Size

(Govt. of Jammu and Kashmir)

LADAKH AUTONOMOUS HILL DEVELOPMENT COUNCIL

LEH

BOGDANG MINI HYDEL PROJECT

2X 400 KW

TENDER DOCUMENT OF PENSTOCK WORKS

(INCLUDING CIVIL WORK)

LADAKH RENEWABLE ENERGY DEVELOPMENT AGENCY (LREDA)

LAHDC- LEH-LADAKH

LREDA TENDER DOCUMENT OF BOGDANG MHP Vol IV

Page 1

CONTENTS

Sr. No. Section Title Page No.

1. Information for Competitive Bidding………………………………………………………...3

2 Check List……………………………………………………………………………………4

3. Invitation for Bids( IFB)……………….…………………………………………………..5-6 4. Salient Features…...............................................................................................................7-12

5. Points Bidders should bear in mind……………………………………………………..13-14

6. Instruction to Bidders (ITB ) …………………………………………........................15-29 A. General 1. Scope of Bid………………………………………………………………………...15 2. Source of Funds……………………………………………………………………..15 3. Eligible Bidders……………………………………………………………………..15 4. Qualification of the Bidder……………………………………………………...15-17 5. One Bid per Bidder………………………………………………………………….17 6. Cost of Bidding……………………………………………………………………..17 7. Site Visit…………………………………………………………………………….17

A. Bidding Documents

8. Content of Bidding Documents……………………………………………………..18 9. Pre-bid Conference (Clarification of Bidding Documents)………………………...18 10. Amendment of Bidding Documents………………………………………………...18

B. Preparation of Bids

11. Language of Bid…………………………………………………………………….19 12. Documents Comprising the Bid…………………………………………………….19 13. Bid Prices………………………………………………………………………..19-20 14. Currencies of Bid and Payment……………………………………………………..20 15. Bid Validity………………………………………………………………………....20 16. Bid Security……………………………………………………………………..20-21 17. Alternative Proposals by Bidders…………………………………………………...21 18. Format and Signing of Bid………………………………………………………….21 19 Sealing and Marking of Bids……………………………………………............22-23 20 Deadline for submission of Bids……………………………………………………23 21 Late Bids……………………………………………………………………………23


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22 Modification and Withdrawal of Bids………………………………………………23

C. Bid Opening and Evaluation

23 Bid Opening………………………………………………………………………...24 24 Process to be Confidential……………………………………………………….24-25 25. Clarification of Bids………………………………………………………………...25 26 Examination of Bids and Determination of Responsiveness…………………...25-26 27. Correction of Errors …………………………………… …………………………26 28. Currency for Bid Evaluation ……………………………………………………….26 29. Preference for experience in Snow-bound regions………………………………….26

D. Award of Contract

30. Award Criteria …………………………………………………………………….27 31. Developer’s Right to Accept any Bid and to reject any or all bids…………………27 32. Notification of Award…………………………………………………………..27-28 33. Performance Security……………………………………………………………….28 34. Agreement…………………………………………………………………………..28 35. Adjudicator…………………………………………………………………………29 36. Delay in order to commence the work……………………………………………...29

7. Schedule of General Particulars of the Bidder………………………………….30

8. Forms: Form-1 : Contractor’s Bid Form………………………………………………………..31-32

Form-2 : Bid Security/Earnest Money……………………………………………….....33-34

Form-3 : Contractor’s Qualification Information………………………………………35-36

Form-4 : Letter of acceptance of bid………………………………………………….…….37

Form-5: Performance security…………………………………………………………..38-39

Form-6: Contract agreement………………………………………………………….…40-41

Form-7: Issue of Notice to Proceed With Work…………………………………………....42

Form-8: Bank guarantee for advance payment………………………………………....43-44

9. Bill of Quantities………………………………………………………………45-59

10. Drawings……………………………………………………………………


Page 3

INFORMATION FOR COMPETITIVE BIDDING

Tender Notice No. : 12 of 2011 dated 28-06-2011

Name of Work : Planning, Design, Engineering, Fabrication, Supply, Transportation, erection/Construction (Incl. Civil Work) Testing, Commissioning of Penstock work of 2x400 kW Bogdang MHP in Nubra Valley, Leh-Ladakh.

Date of Commencement of sale of Bidding document : 28-06-2011 Last date for sale of Bidding document : 26-07-2011 Price of Tender document : Rs. 5000/- (Rs. Seven Thousand Five Hundred only) (Inclusive of Trade Tax) Amount of Earnest money : Rs. 2.58 Lacs Period of validity of tender : 90 days Last date and time for receipt : 29-07-2011 of bids Time and date of opening of Technical bids : 29-07-2011 Date of conference pre-bid : 26-07-2011 Place of opening of bids : Office of the Deputy Commissioner/ CEO LAHDC Date: Sd-

Project Director LREDA

Tsewang Thinglas

Text Box

Five Thousand Rupees


Page 4

CHECK-LIST

Name of Work Planning, Design, Engineering, Fabrication, Supply, Transportation, erection/Construction (Incl. Civil Work) Testing, Commissioning of Penstock work 2x400 KW Bogdang MHP in Nubra Valley, Leh-Ladakh.

1. Have you submitted the cost of Tender Document? Yes/No

2. Have you submitted requisite Earnest Money? Yes/No

3. Have you given the Bid and Price-Schedule Yes/No in the prescribed format?

4. Have you kept you offer valid for 90 days? Yes/No

5. Have you furnished the Eligibility documents? Yes/No

6. Have you submitted the Banker’s Report? Yes/No

7. Have you furnished the statement of Equipment? Yes/No

9. Have you furnished your PAN No., TIN No./S.T certificate Yes/No

10. Any other information (List of Engineers employed with the Agency) etc


Page 5

INVITATION FOR BIDS (IFB)

Tender Notice No. 12 of 2011 Date: 28-06-2011

INVITATION OF BIDS FOR EXECUTION OF PENSTOCK WORKS OF

2X 400 KW BOGDANG MINI HYDRO PROJECT

1. For and on behalf of The Governor of Jammu & Kashmir State, sealed tenders affixed with Rs.

5/- revenue stamps are invited for the “Planning, Design, Engineering, Fabrication, Supply,

Transportation, erection/Construction (Incl. Civil Work) Testing, Commissioning of Penstock work

of 800 kW Bogdang Hydel Project of Shayok cluster in Nubra valley of Leh district” from

Registered agencies/ associations on the basis of the minimum qualification criteria stated in the

tender.

2. Complete set of tender documents can be purchased by a written request accompanied by a non-

refundable fee of Rs. 5000/- (Rupees seven thousand& five hundred only) in the shape of demand

draft drawn in favour of the Project Director, LREDA, payable at Leh. Bidding documents

requested by mail will be dispatched by registered/Speed post on payment of an extra amount of Rs.

1,000 ( Rupees One Thousand Only). LREDA will not be responsible for the postal delay, if any, in

the delivery of the documents or non-receipt of the same. Last date for sale of tender documents is

……….

3. Bids shall be valid for a period of 90 days after Bid opening and accompanied by Bid Security

(Earnest money) in Indian currency in the form of a Bank Draft or Bank Guarantee from a

nationalized/ Scheduled bank pledged to “The Director, LREDA, Leh.

4. Bids must be delivered to the office of the undersigned, complete in all respects on or before 29-

07-2011 at 14.00 hours. Bid will be opened at 15.00 hours or in the presence of the bidders who

may choose to attend the opening.

5. The bidders may submit bids for construction of Penstock works detailed in Table 1 below:

Tsewang Thinglas

Text Box

Five Thousand


Page 6

Table -1

6. A meeting will be held on 26-07-2011.at 11.00 hrs at the office of the undersigned to clarify

issues and to answer questions on the matters that may be raised.

7. Eligibility Criteria and other details can be seen in the bidding documents.

No:………………………….. Sd/-

Date………………………… Deputy Commissioner/CEO

Leh-Ladakh

Copy to:

1. Project Director, LREDA, Leh for information.

2. Technical Director, NIC, Leh with the request to put NIT on official website.

3. Joint Director, information, J&K Srinagar/Jammu with the request to kindly publish the NIT in

one of the leading National and one state English newspaper.

4. Notice Board, Deputy Commissioner Office, Leh.

5. ………………………………………….for Information.

Sd/-

Account Officer

Tender Ref. No.

Name of Work Approx. value of work

Earnest Money (Rs.)

Cost of document

Stipulated Date of Completion

Planning, Design, Engineering, Fabrication, Supply, Transportation, erection/Construction (Incl. Civil Work) Testing, Commissioning of Penstock work of 2x 400 KW Bogdang Mini Hydel Project in Bogdang village, Nubra Valley, Distt. Ladakh.

129.00 lacs

2.58 lacs

5000 + postal charges 1000 (if applicable

30.09.2013


Page 7

SALIENT FEATURES OF THE PROJECT

1 Location

i. State = Jummu & Kashmir

ii. District = LEH

iii. Block = Diskit

iv. Village = Bogdang

v. Geographical co-ordinates of Power House

Latitude = 370

48’ 17” N

Longitude = 770

2 Catchments

02’ 05” E

i. Tributary = Shyok River Tributary of

Indus.

ii. Sub-Tributary = Bogdang Nallah, Tributary of

Shyok River

3 Hydrology:

i. Catchment area of the Steam / Nallah = 112 Sq. Km

ii. Catchment area of the Diversion site or at

Headwork site.

= 100 Sq. Km

iii. Precipitation

Maximum Rainfall = 100 mm to 200 mm

Minimum Rainfall = 92 mm

Average Rainfall = 7.72 mm

Snowfall = 450 to 600 mm depth of snow

at a time.

iv. Dependable Yield


Page 8

Percent Discharge (Cumec)

50% = 1.70 Cum

75% = 0.99 Cum

90% = 0.47 Cum

95% = 0.45 Cum

v. Climate Data

Temperature 0 = C +350 to -35

vi.

0

Floods

Historical

Max. Water level = N.A.

Date of occurrence = N.A.

Observed

Max. Water Level = 3071.2 M

Max. Discharge estimated (cumec) = 102 cumecs

Date of Occurrence = N.A.

Maximum Probable flood (cumec)

Frequency 50 year = 102 cumecs

100 year = N.A.

Design Flood (cumec) = 102 cumecs

Water Level = 3071.2 M

4 (a) Diversion Structure (Headwork)

i. Type of structure

Simple Weir = -----

Trench Weir = Permanent / Trench weir

Concrete = R.C.C.

Any other type = -----

ii. Length of overflow section = 13 M

iii. Maximum discharge capacity (cumec) = 8.38 cumecs

iv. Number, size and type of gates = One, 700 x 800 mm, Screw

hoist type


Page 9

v. Elevation of weir top = 3070.250

vi. Elevation of weir foundation = 3067.800

vii. Bed slope of Trench weir = 1:20

b. Head Regulator

i. Size of Gate = 0.75 x 0.75 Mtr.

ii. Number of Gate = 1 No.

iii. Sill level = 3068.500 M

iv. Deepest Foundation Level = 3067.600 M

v. Top Level of Structure = 3072.200 M

vi. Maximum discharge capacity (cumec) = 1.17 cumecs

vii. Gate Lifting System = Screw hoist, manual

viii. F.S.L. D/s of Gate = 3069.750 M

5 Feeder Pipe

i. Length (M) = 25.0 Mtr.

ii. Size / Section of Channel = 750 mm dia pipe

iii. Bed Slope = 1:170

iv. Manning’s Roughness or friction Coefficient = 0.012

v. F.S. Depth = 750 mm

vi. Maximum Velocity at full discharge (m/sec) = 2.65 m/sec

vii. Velocity at one unit discharge m/sec. = 1.87 m/s

viii. Maximum size of silt/gravel carrying capacity = Upto 10 mm

ix. Whether the pipe is covered or open = Covered

x. Max. Flood level at the start of App. Channel = 3070.750 M

6. Desilting Tank

i. Width (M) = 4.0 M

ii. Length (M) = 30.23 M


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iii. Depth (M) = 2.32 – 3.45 varying

iv. No. of Bays = 1

v. Width of each bay = 4.0 M

vi. F.S.L. = 3069.600 M

vii. Type & Shape of bed = R.C.C. & Trapezoidal

viii. Silt Ejector type = Rectangular cover with

perforated precast slab.

ix. Size of silt ejector = 300 x 300 mm

x. Operation/Lifting system of silt ejector = Sluice valve

xi. Max. size of silt to be removed = 0.2 mm and above

xii. Average designed velocity of flow at FSD = 0.22 m/sec.

xiii. Designed Settling velocity (Vertical) = 0.0201 m/sec

xv. Section of Bye-Pass Channel for non-silty seasons. = 900x1500 mm

7 Power Channel / Water Conductor: Replaced as Penstock

8 Escape /Outlet/Spillway:

i. Location RD-wise = RD 58.49 M

ii. Size of Escape Opening = 6.0 m length x 0.7 m

height.

iii Spillway Length = 6.0 M

iv. Elevation of Spillway Crest = 3069.700 M

v. Depth/Head over Spillway at Full Supply Discharge

= 200 mm

vi. Afflux details at Full Supply Discharge = Afflux created upto the

level of 3069.900M

vii. Length of Chute Channel downstream of Escape /

Spillway

= 30 M (approx.)

viii. Energy dissipater/friction Block details = Cascade type Escape

Channel


Page 11

x. Maximum discharge capacity of Escape/Spillway = 0.88 cumecs

xi. Operation details of Gate/Type of lifting system = N.A

9. Forebay:

i. Retention Period (Mint.) = 1 Minute

ii. Size of Forebay ( L x W x D) = 10.75x2.5x(3.3 to 5.5)

iii Free Board = 800 mm

iv. Depth of dead cushion = 500 mm

v. Elevation of Penstock bell mouth Intake bed / sill = 3065.400 M

vi. Elevation of penstock bell mouth top = 3066.450 M

vii. Bed level of Forebay near Intake bell mouth = 3064.900 M

viii. Depth of water cover above bell mouth = 650 mm

ix. Minimum Draw down Level = 3067.100 M

x. Maximum water level at Full load rejection and

during Full Escape through spillway.

= 3069.900 M

xi. Whether the Forebay is covered or open = Covered

xii. Protection measures against rolling boulders from

hill site.

= Covered with soil.

xiii. Type of lining = RCC

xiv. Type of Insulation or Measure against freezing = Covered with soil

xv. Trash Rack details / type

a). Size of Flat bar = 10 mm

b). Spacing / clear gap = 30 mm

c). Measures against Freezing = Covered

d). Debris removal system = Manual

e). Lifting system for trash rack = Manual

xvii. Gauge Inside Forebay for reading instantaneous

depth / levels

Side scale marking and

Electronic sensor.

xviii. Silt Excluder / Flushing type


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a). Operation details = Not Required

b). Size of gate / valve = N.A

xix. Elevation of different bed levels = 3067.100 M to 3064.900 M

xx. Rung –Ladder for inspection of Forebay bed / sluice

valve / Trash rack

= Two No. Ladder of 500

mm size each.

10. Penstock: (Open for Bidding)

i. Number = One

ii. Diameter (mm) = 700 mm

iii Thickness (mm) = 6 to 8 mm

iv. Length (M)

(Upto bifurcation or Trifurcation)

= 680 M

v. Maximum Velocity

a). Velocity at 3 –unit discharge = ---

b). Velocity at 2 –unit discharge = 2.51 m/sec

c). Velocity at 1 –unit discharge = 1.14 m/sec

vi. Type of connection

a). Flanged /Bolted = N.A

b). Welded joints with

Contraction/Expansion joints

= Welded Joints

c). Spacing of Flanged / Bolted joints = N.A

vii. Type of Insulation to protect from

Sub-zero temperature

= Pipe coat insulation 5 layer

with bitumen 4mm thick,

over Anti corrosive paint.

viii. Whether the Penstock pipe is covered with

Impervious soil or uncovered

Covered

a). Depth / Thickness of soil cover = Covered with minimum

thickness 1.5 Mtr.

ix. Type of Penstock Intake Gate = Screw hoist steel gate

x. Air vent Pipe size = 100 mm dia.


Page 13

xi. Bifurcation / or trifurcation = Bifurcation

xii. Diameter of Bifurcation / trifurcation (mm) = 500 i/d

xiii. Length of Bifurcation / or trifurcation (m) = 7 m

xiv. Thickness of Bifurcation / or trifurcation (mm) = 8 m

xv. Type of Steel with BSI/BS code Number = Grade –I of IS -2002 or

ASTM A285 Grade –C

xvi. Maximum Water Hammer Pressure = 3.65 Kg/cm

xvii.

2

Total pressure, including water hammer, during

sudden closure.

= 15.82 Kg/cm

xviii.

2

Type of PVC / or other material used for Gaskets

between Flanged connections

= N.A

xix. Protection Measures to be adopted against fall of /

rolling boulders / slips/ other type of External

Impact load.

= Covered with soil

xx. Specification of Paints with BSI/BS Code No. = Bitumen primer paint

xxi. Minimum design discharge, cumec/sec. = --

11. Power House:

i. Type of Power House

Surface or underground

=

Surface

ii. Size of Power House, L x B X H (M) = a). Machine Hall: 17x6.0x5.5

b). Control Room:17x4.0x3

iii Type of roofing = Truss with C.G.I sheets and

false ceiling covered with

layers of insulating materials.

iv. Whether beams for E.O.T. crane is required or not. = Yes

v. Elevation of Generator Floor = 2947.650 M

vi. Elevation of deepest foundation = 2945.650 M

vii. Gross Head (M) = 121.6 M


Page 14

viii. Design Head (M) = 116.27 M

ix. Location Details

Latitude = 770

05’ 05” E

Longitude = 370

12 Electro-Mechanical Equipments: (Not included in this Tender)

48’ 17” E

i. Type of Turbine = Francis

ii. Horizontal/ or Vertical = Horizontal

iii Number of Turbine = Two

iv. Capacity of each Turbine (KW) = 400 KW

v. RPM / speed of Turbine = 1500

vi. Permissible speed rise = 35%

vii. Type of Generator

a). Excitation system = Brushless excitation

comprising high

frequency Generator

diode wheel AVR /

APFC

b). Regulation system = AVR

c). RPM = 1500

d). Capacity (KW) = 400 KW

viii. Rating of Generator

KW = 400

Frequency HZ = 50

Voltage / Phase = 3 phase 415 V

Power Factor = 0.8 (Raging between 0.8

and 0.95)

ix. Connection Rotor

(Delta / Star) Stator

=

Six Terminals from three

winding shall be brought

out to terminal box and


Page 15

neutral formed there.

x. Overload capacity = 10%

13. Power:

i. Installed capacity = 800 KW

ii. Firm Power (KW) = 301.12 KW

iii Seasonal Maximum Power (KW) = 498.88 KW

iv. Annual Energy (KW hr)

Firm = 26.378 LU

Seasonal = 33.386 LU

Total = 59.764 LU

10. ESTIMATED COST OF WORK

a) Estimated Cost of Penstock works (Excl. Penstock) : 129.00 lakhs


Page 16

POINTS BIDDERS SHOULD BEAR IN MIND

1 Bids not accompanied by Bid Security (Earnest Money Deposit) shall be summarily

rejected.

2. Non-Compliance with even a minor technical or commercial requirement should be

specifically stated by the bidders.

3. Bidders should furnish their complete address for the purpose of further correspondence

pertaining to bidding document.

4. Correction in the bid should be clear and initiated at the place of corrections.

5. Specifications, Conditions, Schedules and Drawings of Bidding Document constitute an

integral part of the bid.

6. Negligence of the bidder in preparing bid confers no right to withdraw the bid after it

was opened and before expiry of stipulated validity period.

7. The bid, along with Enclosures, Drawings and Technical Literature should be in English

only.

8. All the bidders should submit Qualification Information in the given format with

requisite documentation.

9. Bids should be kept valid for acceptance for a period of 90 days from the day bids are

opened.

10. The bidding document shall be governed and integrated according to the laws of the

Union of India. Rules and Regulations being followed in the state of J&K where work is

being done will be observed.


Page 17

11. All bidders are urged to submit promptly written requests on matters where clarifications

or additional information are desired, not later than twenty days before bids are due for

opening. No extension in due date of submission of bids will be allowed on this ground.

12. Bids should be responsive to the Instructions to Bidders and the conditions of contract in

the bidding document. For this purpose, bidders should complete the attached checklist.

13. The contractor shall comply with the provision of all applicable Labour Laws.

14. Developer/owner reserves the right to accept or reject any or all bids without any

explanation to bidders.

15. The bidder should quote rates without any condition. Conditional rates/amount will not

be accepted and the tender shall be rejected.


Page 18

INSTRUCTION TO BIDDERS (ITB)

GENERAL

1. SCOPE OF BID

1.1 The Chief Executive Officer/Deputy Commissioner, referred to as ‘the Developer/Owner’ in

these documents invites bids for the execution of Penstock Works of Bogdang Mini-Hydel

Project (2 400 KW capacity). The scope of the work shall Planning, Design, Engineering,

Fabrication, Supply, Transportation, erection/Construction (Incl. Civil Work) Testing,

Commissioning of Penstock work of civil works of 2 400 KW Bogdang MHP (as defined

in these documents, and referred to as the “Works”).

1.2 The successful bidder will be expected to complete the Works as per project Schedule.

2. SOURCE OF FUNDS

2.1 The funds for this project will be provided by the Developer/Owner LREDA/MNRE

3. ELIGIBLE BIDDERS

3.1 The invitation for Bids is open to all bidders who qualify the criteria stated in clause 4.

4. QUALIFICATION OF THE BIDDER

4.1) Contractor Information

All the bidders shall provide Contractor’s Qualification Information in the prescribed form:

Duly signed and stamped by the tenderer and attested by gazetted officer to include the following

information and documents with their bids:

a) Copies of documents defining the Constitution of legal status, place of registration and principal places of business, written Power of Attorney of the signatory of the bid to commit the bidder.


Page 19

b) Proof of enlistment as Class A/Class-I Contractor in any Centraol/State Government department

4.2 )Work Experience Certificate

a) The bidder shall have to fulfil the criteria of satisfactory execution and successful completion of works as given below, with proof of completion certificate issued by an authority not less than the rank of Superintending Engineer. The experience of works should be shown during the last 10 years. i) One similar nature work of value not less than 70% of the estimated cost of this tender ii) Or two works of similar nature, each of value not less than 50% of the estimated cost of the

project iii) Or three works of similar nature, each of value not less than 40% of the estimated cost of

the project

4.3 Machinery and Equipment

a) The tenderer shall have available (either owned or leased) the minimum of the following essential equipment and the bidder shall produce proof of the same equipment: i) Concrete Mixer (>7 cft.) 2 Nos. ii) Concrete Vibrators 3 Nos. iii) Air Compressor 1 No. iv) Excavator/ Hydraulic Shovel 1 No. v) Truck/Dumpers 2 No. vi) Digital Theodolite 1 No. (Complete Set) vii) Automatic Levels & Levelling Staff 1 No.

b) Workshop Facilities with proof of the equipment: i) Rolling Machine (for rolling steel plates) ii) Automatic Welding Machine (for circumferential and longitudinal joints) iii) Welding Electrodes iv) Generator v) Radio Graph Testing Facilities vi) Hydrostatic Pressure Testing Facilities

4.4 Technical and Managerial Staff

a) Availability of a project manager (B.E Mechanical Engineer) with not less than 5 years experience in the works of Hydel Projects/ similar nature of works

b) Availability of 1 Mechanical Engineers (Degree/Diploma) with 3 years minimum experience along with key designer and site management personnel as required

c) Availability of Civil Engineer (Degree/Diploma) with 3 years minimum experience d) Availability of Qualified Welder with minimum 5 years experience in similar nature of works


Page 20

In-case of non-availability of engineers, the bidder shall arrange the above mentioned engineers and

technical staff with proof of their experience certificate and in this respect the bidder will produce an

undertaking in the form of affidavit for engagement of these engineers till completion/commissioning

of the MHP-Project.

4.5 Financial Conditions

a) Report on the financial standing of the bidder, such as profit and loss statement and auditor’s report demonstrating that the bidder has achieved a minimum annual financial turnover of Rs. 1.00 Crore at least 3 (three) times in the last 5 years.

b) Evidence of adequacy of working capital for the contract, i.e. evidence of access to line(s) of credit from other financial resources must be produced

c) Latest Bank Solvency Certificate of the year 2010-2011 for at least Rs. 5 (five) Crores must be produced

d) Auditor Balance Sheet by Chartered Accountant for the last 3 (three) years must be produced. e) The proposed methodology and program of construction, backed with equipment planning, and

deployment, duly supported with broad calculation and quality control procedures proposed to be adopted, justifying their capability of execution and completion of the works and per technical specification in the stipulated period of completion as per milestones for the period.

f) CDR for 2% of the estimated cost, as earnest money pledged to the Project Director, LREDA-LAHDC, Leh

g) Last income tax clearance certificate from the Income Tax Department h) If a bidder applies for more than one project work, the allotment of works will depend on his

financial and technical capabilities. To allot two or three project works, the bidder/joint venture shall produce technical bid capacities as per (sub-clause 4.1 to 4.5) proportionately two or three times more, otherwise more than one work shall not be allotted even if the financial bid is found to be the lowest.

4.6 Joint Venture

a) Bids submitted by a joint venture of two or three firms (more than four shall not be allowed) shall comply with the following further requirements: i) The deed shall include all the information listed in sub-clause 4.1-4.5 above for each joint

venture partner ii) A leading partner shall be nominated as being in charge and this authorization shall be

evidenced by submitting a Power of Attorney signed by legally authorized signatories of all the partners. The leading partner must fulfil 50% of the above conditions under sub-clause 4.1-4.5.

iii) LREDA shall communicate with the leading partner for all works related to the project and the leading partner shall be responsible for the entire execution of the contract till finalization and commissioning.


Page 21

iv) The bid shall include a Performa of the joint agreement which will state, inter alia, that all partners shall be liable jointly and severally for the execution of the contract and that the partner in-charge shall be authorized to incur liabilities and receive instructions for an on behalf of any and all partners, and the entire execution of the contract including payments shall be done exclusively with the partner-in-charge.

v) Agreement of partnership duly authenticated by competent authority should be submitted as part of technical bid.

vi) For a joint venture to qualify, each of its partners must meet as least 25% of minimum criteria (sub-clause 4.2 to 4.5) for an individual bidder, and the lead partner at least 50% of the minimum criteria (sub-clause 4.2 to 4.5). Failure to comply with this requirement will result in the rejection of the joint venture bid. The experience and resources of sub-contractors shall not be taken into account in determining the bidder’s compliance with the qualifying criteria.

5. BID PER BIDDER

5.1 Each bidder shall submit only one bid, either by himself or as a partner in a joint venture. A

bidder who submits or Participates in more than one bid will be disqualified.

6. COST OF BIDDING

6.1 The bidder shall bear all cost associated with the preparation and submission of his bid, and

the developer/Owner will in no case be responsible or liable for those costs.

7. SITE VISIT

7.1 The bidder is advised to visit and examine the Site of Works and its surroundings and obtain for

himself on his own responsibility all information that may be necessary for preparing the bid

and entering for execution of the Works.

The costs of visiting the site shall be at the bidder’s own expenses. The bidder is to contact the

developer/Owner before the visit.

.


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BIDDING DOCUMENTS

8. CONTENT OF BIDDING DOCUMENTS

8.1 The set of bidding documents comprises the Tender document, General and Special

conditions of the contract, Technical specifications, Bid Forms, Drawings and

addenda issued in accordance with Clause 10.

8.2 The bidding documents supplied shall be completed & returned to the Developer.

9. PRE-BID CONFERENCE: (CLARIFICATION ON BIDDING DOCUMENTS)

9.1 A prospective bidder requiring any clarification on the bidding documents may

notify the Developer/Owner in writing at the Developer/Owner’s address indicated

in the invitation bid. The Developer/Owner will respond to any request for

clarification, which he receives earlier than fourteen days prior to the deadline for

submission of bids in the pre-bid conference. Copies of the minutes of conference

will be forwarded to all the bidders who purchased the tender documents.

10. AMENDMENT OF BIDDING DOCUMENTS

10.1 Before the deadline for submission of bids, the Developer/Owner may modify the

bidding documents by issuing addenda.

10.2 Any addendum thus issued shall be part of the bidding documents and shall be

updated on the website.

10.3 To give prospective bidders reasonable time in which to take an addendum into

account in preparing their bids, the Developer/Owner may extend as necessary the

deadline for submission of bids, in accordance with Sub-Clause 20.2.


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PREPARATION OF BIDS

11. LANGUAGE OF BID

11.1 All documents relating to the bid shall be in the English language. Information in

any other language should be accompanied with its translation in English.

12. DOCUMENTS COMPRISING THE BID

12.1 The Bid documents as mentioned in Vol-IV Civil Works, entitled ‘Bid ‘Documents’

shall comprise the following:-

(a) Contractor’s Price Bid

(b) Earnest money

(c) Contractor’s Qualification Information/Documents

(d) Schedule of Quantity

(e) Specifications and drawings

(f) Contractor’s conditions.

and any other documents required to be completed and submitted by bidders in

accordance with these instructions.

13. BID PRICES 13.1.1 The Contract shall be for the whole Works as described in Sub-Clause 1.1. The

Bidder shall give the item-wise rates as well as the total cost of Works in the Bill of

Quantities.

13.2 Items in the Price Schedule for which no price is entered by the bidder shall be

executed but will not be paid for by the Developer/Owner when executed and shall

be deemed covered by the total bid price of the tender.


Page 24

13.3 All duties, Taxes, Sales Tax, service Tax on works contract and other levies payable

by the contractor under the Contract, or for any other cause, shall be included in total

Bid Price submitted by the Bidder.

13.4 The price quoted by the bidder are subject to adjustment during the performance of

the Contract in accordance with the provisions of Clause 38 of the General

Conditions of Contract. The price/rate quoted by the bidder will remain same till the

completion and commissioning of the project.

14. CURRENCIES OF BID AND PAYMENT

14.1 The unit rates and the price shall be quoted by the bidder entirely in Indian Rupees.

15. BID VALIDITY

15.1 Bids shall remain valid for a period of ninety (90) days after the date of opening of

tenders. Without this validity the tenders will be rejected. The validity must be

mentioned on the envelope otherwise the tender will not be opened.

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

Developer/Owner may request that the bidders extend the period of validity for a

specified additional period. The request and the bidder’s responses shall be made in

writing. A bidder may refuse the request without forfeiting his bid security. A bidder

agreeing to the request will not be required or permitted to modify his bid, but will

be required to extend the validity of his bid security for the period of the extension,

and in compliance with Clause 16 in all respects.

16 BID SECURITY/ EARNEST MONEY

16.1 The bidder shall furnish, as part of his bid, a bid security in the amount as mentioned

in Indian Currency as indicated by the Developer/Owner.

16.2 The bid security shall, at the bidder’s option, be in the form of a FDR, bank draft or

a bank guarantee from a Nationalized/ Scheduled Bank located in India, pledged in


Page 25

favor of the “Director LREDA. The format of the bank guarantee shall be in

accordance with form No. 2 (sample form of bid security). The bank guarantees

issued as surety for the bid shall be valid for 30 days beyond the validity of the bid.

16.3 Any bid not accompanied by an acceptable bid security will be disqualified and

rejected by the Developer/Owner. Bidders may note that no relaxation in this regard

will be made.

16.4 The bid security of unsuccessful bidders will be returned after the award is finalized.

16.5 The bid security of the successful bidder will be discharged when the bidder has

signed the Agreement and furnished the required performance security.

16.6 The bid security will be forfeited.

(a) if the bidder withdraws his bid during the period of bid validity.

(b) if the bidder does not accept the correction of his bid price, pursuant to

Clause 27; or

(c) in the case of a successful bidder, if he fails within the specified time limit to

(i) Sign the Agreement; or

(ii) Furnish the required performance security.

17 ALTERNATIVE PROPOSALS BY BIDDERS

17.1 Bidders shall submit offers which comply with the requirement of the bidding

documents, including the basic technical design as indicated in the drawings and

specifications. Alternatives may not be considered.

18 FORMAT AND SIGNING OF BID

18.1 The bidder shall prepare the documents comprising the bid as described in Clause 1,

of these Instruction to Bidders


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18.2 All pages of the bid shall be signed by the person or persons signing the bid.

18.3 The bid shall contain no alternations or additions, except those to comply with

instruction issued by the Developer/Owner, or as necessary to correct errors made by

the bidder, in which case such corrections shall be initialed by the person or persons

signing the bid.

19. SEALING AND MARKING OF BIDS

19.1 Tender should be submitted in two separate sealed envelopes as mentioned below:

19.2 All Prequalification documents as per Clause 4 alongwith Earnest money shall be

submitted in a separate envelope super-scribed as Cover-I.

19.3 Second envelope should be super-scribed Cover-II and should contain only Price -

Bid.

19.4 Both the inner envelopes should be sealed and put in an outer envelope and

addressed to:

(a) Office of The Deputy Commissioner/ CEO,

Ladakh Autonomous Hill Development Council

Leh

(b) and bear the following identification:

-Bid for - PENSTOCK WORKS OF BOGDANG HYDEL PROJECT

-Tender Notice No…12 of 2011

-DO NOT OPEN BEFORE 29-07-2011 Hours on 14hrs

19.3 In addition to the identification required in Sub-Clause 19.2, all the envelopes shall

indicate the name and address of the bidder to enable the bid to be returned

unopened in case it is declared late, pursuant to Clause 21.


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19.4 If the envelopes are not sealed and marked as above, the Developer/Owner will

assume no responsibility for misplacement or premature opening of the bid.

20. DEADLINE FOR SUBMISSION OF BIDS

20.1 Bids must be received by the Developer/Owner at the address specified in the tender

notice not later than the time and date specified.

20.2 The Developer/Owner may extend the deadline for submission of bids issuing an

amendment in accordance with Clause 10, in which case, all rights and obligations

of the Developer/Owner and the bidder previously subject to the original deadline

will then be subject the new deadline.

21. LATE BIDS

21.1 Any bid received by the Developer/Owner after the deadline prescribed in Clause 20

will be returned unopened to the bidder.

22. MODIFICATION AND WITHDRAWAL OF BIDS

22.1 The Bidder may modify or withdraw his bid by giving notice in writing atleast one

day before the deadline prescribed in Clause 20.

22.2 The bidder ‘s modification or withdrawal notice shall be prepared sealed, marked

and delivered in accordance with Clause 19, with the outer and inner envelopes

additionally marked “MODIFICATION” or “WITHDRAWAL” as appropriate.

22.3 No bid may be modified after the deadline as specified in Sub-Clause 22.1.

22.4 Withdrawal of a bid after submission of bid and before the expiration of period of

bid validity shall result in the forfeiture of the bid security pursuant to Clause 16.


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BID OPENING AND EVALUATION

23. BID OPENING

The procedure of opening the tender shall be as under:-

23.1 First envelope bearing NIT number and super-scribed Cover-I shall be opened on the

date as mentioned in the tender notice by Deputy Commissioner, Leh or his

representative in the presence of tenders who choose to be present.

23.2 Second envelope bearing NIT number and super-scribed Cover-II shall be opened on

the date and time as decided by the tender committee. Second envelope of only those

bidders should be opened whose first envelope is found technically/commercially

eligible.

23.3 The Developer/Owner will open the bids, including modifications made pursuant to

Clause 22, in the presence of the bidder’s representative who choose to attend at the

time and date as specified in Clause 20.

23.4 Envelopes marked “WITHDRAWAL” shall be opened and read out first. Bids for

which an acceptable notice of withdrawal has been submitted pursuant to Clause 22

shall not be opened.

23.5. The bidder’s names, the bid price, the total amount of each bid, any discounts, bid

modifications and withdrawals, the presence or absence of bid security, and such

other details as the Developer/Owner may consider appropriate, will be announced

by the Developer/Owner at the opening.

23.6 The Developer/Owner shall prepare minutes of the bid opening, including the

information disclosed to those present in accordance with Sub-Clause 23.5.

24. PROCESS TO BE CONFIDENTIAL

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

bids and recommendations for the award of a contract shall not be disclosed to


Page 29

bidders or any person not officially concerned with such process until the award to

the successful bidder has been announced.

24.2 Any effort by a bidder or his representative to influence the Developer/Owner’s

decision on the tender, officially or otherwise shall render the tender liable to be

summarily rejected.

25. CLARIFICATION OF BIDS

25.1 To assist in the examination, evaluation, and comparison of bids, the

Developer/Owner may, at his discretion, ask any bidder for clarification of his bid,

including breakdowns of unit rates. The request for clarification and the response

shall be in writing or by cable but no change in the price of substance of the bid shall

be sought, offered, or permitted except as required to confirm the correction of

arithmetic errors discovered by the Developer/Owner in the evaluation of the bids in

accordance with Clause 27.

26. EXAMINATION OF BIDS AND DETERMINATION OF RESPONSIVENESS:

26.1 Prior to the detailed evaluation of bids, the Developer/Owner will determine whether

each bid (a) meets the eligibility criteria (b) has been properly signed. (c) is

accompanied by the required securities: (d) is substantially responsive to the

requirements of the bidding documents: and (e) provides any clarification and/or

substantiation that Developer/Owner may require pursuant to Sub – Clause 25.1

26.2 A substantially responsive bid is one which conforms to all the terms and conditions,

and specifications of the bidding documents, without material deviation or

reservations. A material deviation or reservation is one (a) which affects in any

substantial way the scope, quality, or performance of the works: (b) which limits in

any substantial way, inconsistent with the bidding documents, the

Developer/Owner’s rights or the bidder obligations under the contract or (c) whose

rectification would affect unfairly the competitive position of other bidders

presenting substantially responsive bid.


Page 30

26.3 If a bid is not substantially responsive, it will be rejected by the Developer/Owner,

and may not subsequently be made responsive by correction or withdrawal of the not

conforming deviation or reservation.

27. CORRECTION OF ERRORS

27.1 Bids determined to be substantially responsive will be checked by the

Developer/Owner for any arithmetic errors. Errors will be corrected by the

Developer/Owner as follows:

(a) Where there is discrepancy between the amounts in figure and in words, the

amount in words will be govern and,

b) Where there is discrepancy between the unit rate and the line item total

resulting from multiplying the unit rate by the quantity, the rate as quoted

will govern.

27.2 The amount stated in the bid will be adjusted by the Developer/Owner in

accordance with the above procedure for the corrections of the errors and, with the

concurrence of the bidder, shall be considered as binding upon the bidder. If the

bidder does not accept the corrected amount of bid, his bid will be rejected, and the

bid security may be forfeited in accordance with Sub– Clause 16.6 (b)

28. CURRENCY FOR BID EVALUATION

28.1 Bids shall be evaluated as quoted in Indian Rupees in accordance with Sub– Clause

14.1


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AWARD OF CONTRACT

30. AWARD CRITERIA

30.1 Subject to Clause 26, the Developer/Owner will award the Contract to the bidder

whose bid has been determined to be substantially responsive to the bidding

documents and who has offered the Lowest Evaluated Bid Price provided that such

bidder has been determined to be (i) eligible in accordance with the provisions of

Clause 3 and qualified in accordance with the provisions of Clause 4.

30.2 Any canvassing of Developer/Owner by the Bidder will result in disqualification of

the Bid.

30.3 After a firm decision has been reached on the bid meriting for award, the deviations

between the bid documents and the selected bid will be resolved by discussion duly

minuted.

31. DEVELOPER/OWNER’S RIGHT TO ACCEPT ANY BID AND TO REJECT ANY

OR ALL BIDS

31.1 Notwithstanding Clause 30, the Developer/Owner reserves the right to accept or

reject any bid, and to cancel the bidding process and reject all bids, 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

grounds for the Developer/Owner’s action.

32. NOTIFICATION OF AWARD

32.1 Prior to expiration of the original period of bid validity prescribed by the

Developer/Owner, the Developer/Owner will notify the successful bidder by

cable/telex or fax confirmed by registered letter that his bid has been accepted. This

letter (hereinafter and in the Conditions of Contract called the “Letter of


Page 32

Acceptance”) shall state the sum that the Developer/Owner will pay the Contractor

in consideration of the Execution and completion of the Works by the Contractor as

prescribed by the Contract (hereafter and in the Contact called “Contract price”).

32.2 The notification of award will constitute the formation of Contract, subject only to

the furnishing of a performance security in accordance with the provisions of Clause

33.

33. PERFORMANCE SECURITY

33.1 Within 15 days of receipt of the notification award from the Developer/Owner, the

successful bidder shall furnish the Developer/Owner a Performance Security in the

form of a Bank call deposit receipt, Post Office saving Bank deposit or a bank

guarantee in the form approved by LAHDC, an amount equivalent to three percent

of the Contract price .

[33.2 If the performance security is to be provided by the successful bidder in the form of

a bank guarantee, it shall be issued at the bidder’s option, by a

Nationalized/Scheduled Bank located in the country of the Developer/Owner.

33.3 Failure of the successful bidder to comply with the requirements of Sub-Clause 33.1

shall constitute sufficient ground for cancellation of the award and forfeiture of the

award and forfeiture of the bid security.

34. AGREEMENT

34.1 The contractor shall within 15 days of the issue of the notice of acceptance of his

tender and having furnished the Performance Security deposit as per Clause 34

above, shall execute the agreement in form No. 6. The agreement will thereafter be

signed by the Developer/Owner and the Engineer-in-Charge will issue notice to the

contractor to commence the work and all promptly notify the other bidders that their

bids have been unsuccessful.


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34.2 In case the contractor starts works or incur any liabilities prior to the receipt of

notice to commence the work from the Engineer-in-Charge as per clause 4.4, he

shall do so at his own responsibility and risk and no payment whatsoever shall be

made by the Developer/Owner.

35. ADJUDICATOR/ARBITRATOR

35.1 The Developer/Owner may propose any adjudicator who may be appointed

with the consent of both parties.

36. DELAY IN ORDER TO COMMENCE THE WORK

36.1 Any delay in the work on the part of the Engineer-in-Charge in the issue of

the order to commence the work shall not be considered a ground for any

claim for compensation by the contractor nor shall the contractor be entitled

to extension of time if the issue of the order to commence the work is

delayed due to any of the conditions necessary to be complied with by the

contractor remaining incomplete or due to any other lapse on the part of the

contractor, provided that if the issue of the order to commence work is

delayed without any fault of the contractor, fair and reasonable time

extension corresponding to the delay in issue of such order may be

considered.


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1. Name of the bidder :

SCHEDULE OF GENERAL PARTICULARS OF THE BIDDER

2. Postal address :

3. Telephone/Fax, e-mail etc. : [

4. Name and designation of the representative

of bidder to whom all reference shall

be made :

5. Amount and reference of

Earnest Money deposited :

7. Financial Capacity of the Contractor/firm

for Carrying out the Work (Annual Turnover

during last five years of Contractor/Firm) :


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FORM 1

CONTRACTOR’S BID FORM

To

The Deputy Commissioner/ CEO,

Ladakh Autonomous Hill Development Council

Leh-Ladakh

Jammu & Kashmir

Tel: 01982-252010, 255573, Fax: 01982-252016.

Subject: “Planning, Design, Engineering, Fabrication, Supply, Transportation,

erection/Construction (Incl. Civil Work) Testing, Commissioning of

Penstock work of 2x400 kW Bogdang MHP in Nubra Valley, Leh-

Ladakh.

Ref.: Tender Notice No. 12 of 2011 dated: 28-06-2011

Dear Sir,

In compliance with your invitation for tender, we hereby submit our Bid for the

above works & undertake to keep our Bid valid for a period of three months from the

date of opening of Bid.

We offer to execute the Work described above in accordance with the conditions of the

Contact for the Contract Price of Rs.…………………………….(in figures)

……………………………………………………… (in words).

We agree that upon receipt of written notice to proceed with the work, we will execute

the contract form within 7 calendar days in accordance with the conditions of the

contact. We further agree that we will commence this work within 30 days after the date

of receipt of notice to proceed with the work and carry out the work within the time limit

fixed in accordance with the conditions of the contact.


Page 36

The bid and your written acceptance of it shall constitute a binding contract between us.

We understand that you are not bound to accept the lowest or any bid you receive.

The Earnest money of Rs. 2.58 lacs (Rupees Two lacs and fifty eight thousand Only/-) is

enclosed as DD/BG/FDR/CDR, (Name of nationalized bank)………………………….

Yours faithfully,

Signature :

Title :

Address :


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FORM 2

BID SECURITY/ EARNEST MONEY

( Form of Bank Guarantee)

Whereas ………………………………. (hereinafter “the Bidder”) has submitted his bid

dated……………….. for the Planning, Design, Engineering, Fabrication, Supply,

Transportation, erection/Construction (Incl. Civil Work) Testing, Commissioning of

Penstock work of 2x 400 kW Bogdang Hydel Project, Nubra valley, Leh-Ladakh (therein

after called “the Bid”).

KNOW ALL MEN by these presents that We, ………………………………….. (name of

bank) having our registered office at ……………………………. thereunder called “the

Bank”) are bound unto Ladakh Renewable Energy Development Agency, Leh (thereinafter

called “the Developer/Owner”) in the sum of ……………………. for which payment well

and truly to be made to the said Developer/Owner the Bank binds himself, his successors

and assigns by these presents.

Signed this ………………. day of ………………… 20...

THE CONDITIONS of this obligation are:

1. If the bidder withdraws or modifies his Bid during the period of bid validity

specified in the Form of Bid or

2. If the Bidder having been notified of the Acceptance of his Bid by the

Developer/Owner during the period of bid validity:

(a) Fails or refuses to execute the Contract Agreement in accordance with the

Instructions to Bidders, if required : or

(b) Fails or refuses to furnish the Performance Security, in accordance with the

Instruction to Bidders:


Page 38

We undertake to pay the Developer/Owner upto the above amount upon receipt of his first

written demand, without the Developer/Owner having to substantiate his demand, provided

that in its demand the Developer/Owner will note that the amount claimed by him is due to

him owing to the occurrence of one or both of the two conditions, specifying the occurred

condition or conditions.

The Guarantee will remain in force up to and including thirty (30 days) after the end of the

validity period of the Bid. Any demand in respect of this Guarantee should reach the Bank

not later than the above date.

DATE……………………. SIGNATURE OF THE BANK

WITNESS………………. SEAL………………………….

(Signature, name and address)


Page 39

FORM 3

CONTRACTOR’S QUALIFICATION INFORMATION

The information to be filled in by the bidder in the following pages will be used for

purposes of post qualification as provided for in clause 4 of the Instruction to Bidders.

1.1 Construction or legal status of bidder (Attach Copy)

Place of registration : ……………………….

Principal place of business : ………………………

Power of attorney of Signatory of bid : ………………………..

1.2 Total annual value of Civil Construction work performed in last five

Years: (Attach Audited Balance Sheets and P&L accounts)

2006-2007………………………………………

2007-2008………………………………………

2008-2009………………………………………

2009-2010………………………………………

2010-2011………………………………………

1.3 Qualification and Experience of Key personnel proposed for administration and

execution of the Contract. (Use separate sheet and Attach Curricula Vitae alongwith

proof of employment)

Name Responsibility/

Designation

Qualification Years of

Experience


Page 40

1.4 Evidence of access to financial resources to meet the qualification requirements: cash in

hand, lines of credit, etc. List them below and attach copies of Solvency certificates.

_______________________________________________________________________

_______________________________________________________________________

1.5 Name address, telephone, telex and fax numbers of the bidder bankers who may provide

references of bidder to the Developer/Owner.

_______________________________________________________________________

_______________________________________________________________________

________________________________________________________

1.6 Statement of compliance with the requirements of sub-Clause 4.1 of the Instruction to

Bidders.

1.7 Proposed work method and schedule. The bidder should attach descriptions, drawings, and

charts as necessary to comply with the requirements of the bidding documents with time

charts, outline methods, statement etc.

2.0 Additional Information, (if any).

(Signature of Bidder with Seal)


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FORM 4

LETTER OF ACCEPTANCE OF BID

(Letter head paper of the Developer)

……………………(date)

To…………………………………….

(Name and address of the Contractor)

Dear Sirs,

This is to notify you that your bid dated ………………. for the “Planning, Design, Engineering,

Fabrication, Supply, Transportation, erection/Construction (Incl. Civil Work) Testing,

Commissioning of Penstock work of 2x 400 kW Bogdang Mini Hydel project in Nubra valley,

Leh for the Contract Price of …………………………………………………………….(amount in

figures and words) in accordance with the conditions of the contract is hereby accepted.

You are hereby instructed to proceed with the execution of contract form within 07 calendar days

from the date of receipt of this notice for the execution of the said Works in accordance with the

Contract documents.

Signed

(For and on behalf of LREDA)


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FORM 5

(form of Bank Guarantee)

To

The Deputy Commissioner/ CEO

LAHDC

Leh- Ladakh

WHEREAS (Name and address of Contractor) hereunder called “The Contractor” has undertaken,

in pursuance of Contract No. ……………… dated ……………. to execute the work of “Planning,

Design, Engineering, Fabrication, Supply, Transportation, erection/Construction (Incl.

Civil Work) Testing, Commissioning of Penstock work of 2x 400 kW Bogdang Mini Hydel

project in Nubra valley, Leh ( hereinafter called “the Contract”):

AND WHEREAS it has been stipulated by you in the said Contract that the Contractor shall furnish

you with a Bank Guarantee by a recognized bank for the sum specified therein as security for

compliance with his obligation in accordance with the Contract.

AND WHEREAS we have agreed to give the Contractor such a Bank Guarantee.

NOW THEREFORE we hereby affirm that we are the Guarantors and responsible to you, on behalf

of the Contractor, upto a total of (amount of guarantee) ………………………………….. (in

words), such sum being payable in the types and proportions of currencies in which the Contract

Price is payable and we undertake to pay you upon your first written demand and without cavil or

argument, any sum or sums within the limits of ……………………………. (amount of guarantee)

as aforesaid without your needing to prove or to show grounds of reasons for your demand for the

sum specified therein.


Page 43

We hereby waive the necessity of your demanding the said debt from the Contractor before

presenting us with the demand.

We further agree that no change or addition to or, other modification of the terms of the Contract or

of the Works to be performed there under or of any of the Contract document which may be made

between you and the Contractor shall in any way release us from any liability under this guarantee

and we hereby waive notice of any such change, addition or modification.

This guarantee shall be valid until the completion of the Defect Liability Period.

SIGNATURE AND SEAL OF GUARANTOR …………………………………….

Name of Bank …………………………………….

Address …………………………………….

Date …………………………………….


Page 44

FORM 6

CONTRACT AGREEMENT

(On minimum Rs. 100/- Stamp paper)

The agreement made the ………… day of ..….20 …………………between Ladakh Renewable

Energy Development Agency, Leh (hereinafter called “the Developer”) and

…………………………………………………………... (name and address of the Contractor)

thereinafter called the Contractor of the other part).

Whereas the Developer is desirous that the Contractor execute the contract for the Planning,

Design, Engineering, Fabrication, Supply, Transportation, erection/Construction (Incl.

Civil Work) Testing, Commissioning of Penstock work 2 x 400 kW Bogdang Mini Hydel

Project (name of the project and identification number of Contract) thereinafter called “the Works”)

and the Developer has accepted the Bid of the Contractor for the execution and completion of such

Works and the remedying of any defect’ therein.

NOW THIS AGREEMENT WITNESSES AS FOLLOWS:

1. In this agreement, words and expressions shall have the same meanings as are respectively

assigned to them in the conditions of contract hereinafter referred to, and they shall be

deemed to form and be read and construed as part of the Agreement.

2. In consideration of payments to be made by the Developer to the Contractor as hereinafter

mentioned, the Contractor hereby covenants with the Developer to execute and complete the

“Works and remedy any defect therein conformity in all respects with the provisions of the

Contract.

The following documents shall be deemed to form and be read and constructed as part of this

agreement:

i) Letter of Agreement.


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ii) Notice to proceed with the Works.

iii) Contractor’s Bid.

iv) General and Special Conditions of the Contract.

v) Conditions of Contactor.

vi) Technical Specifications.

vii) Drawings.

viii) Price Schedule/BOQ.

ix) Any other document stated in the Tender as forming part of the Contract.

3 The Developer hereby covenants to pay the Contractor in consideration of the execution and

completion of Works and the remedying the defects wherein the Contract Price or such other

sum as may become payable under the provision of the Contract at the times and in the manner

prescribed by the Contract.

In witness whereof the parties there to have caused the Agreement to be executed on the day,

month and year first before written.

For & on behalf of the Contractor For & on behalf of LREDA

…………………………………… ……………………………………

…………………………………… ……………………………………

…………………………………… ……………………………………

Place : Place:

Date: Date:

Witness: Witness:

1. ……………………………… 1………………………………

2. ……………………………… 2.………………………………


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FORM 7

ISSUE OF NOTICE TO PROCEED WITH WORK

To, Date ………...

………………………….. (Name and Address of the Contractor)

…………………………..

…………………………..

Dear Sir,

Pursuant to your furnishing the requisite Performance Security and signing of the contract for the

Planning, Design, Engineering, Fabrication, Supply, Transportation, erection/Construction

(Incl. Civil Work) Testing, Commissioning of Penstock work of 2 x 400 KW Bogdang MHP in

Nubra valley, Leh, at a Bid Price of Rs. ………………….. you are hereby instructed to proceed

with the execution of the said Works in strict accordance with the Contract Documents.

Yours faithfully,

Signed

(for & on behalf of LREDA)

FORM 8


Page 47

BANK GUARANTEE FOR ADVANCE PAYMENT

To

The Deputy Commissioner/ CEO

LAHDC

Leh- Ladakh

Name of the Work:- “Planning, Design, Engineering, Fabrication, Supply,

Transportation, erection/Construction (Incl. Civil Work) Testing, Commissioning of

Penstock work of 2x 400 kW Bogdang Mini Hydel Project”

Dear Sir

In accordance with the provisions of the Conditions of Contract (“Advance Payment”) of the above

mentioned Contract, ………………………….. (name and address of contractor) (hereinafter

called “the Contractor”) shall deposit with LREDA, a bank guarantee to guarantee his proper and

faithful performance under the said Clause of the Contract in an amount of …………………….

(amount of guarantee) ……………………………………………. (in words).

We, the ……………………………….. (bank or financial institutions) as instructed by the

Contractor, agree unconditionally and irrevocably to guarantee as primary obligator and not as

Surety merely, the payment to……………………………… (name of Developer/Owner) on its first

demand without whatsoever right of objection on our Part and without its first claim to the

Contractor, in the amount not exceeding ……………………………(amount of guarantee)

…………………………………(in Words).

We further agree that no change or addition to or other modification of the terms of the Contract or

of Works to be performed there under or of any of the Contract documents, shall not in any way

affect our obligation under this guarantee arising out of such change, addition or modification.


Page 48

This guarantee shall remain valid and in full effect from the date of the advance payment under the

Contract until Ladakh Renewable Energy Development Agency, Leh receives full repayment or

adjusts the advance amount from the works executed by the Contractor.

Yours truly,

SIGNATURE AND SEAL:

Name of Bank/Financial Institution:

Address:


Page 49

BILL OF QUANTITY

(BOQ)


Page 50

PENSTOCK Cum POWER CHANNEL

Sr.No Code No.

Item Unit Qty To be filled by Tenderer

Rate Amount

1 Earth work in excavation by manual means in trenches for foundations, drains, pipes, cables etc.(Not exceeding 1.5 mtr in width)

a) 2.9.1 Ordinary rock Cum 150.0 b) 2.9.2 Hard Rock (Required

blasting) Cum 1598.0

c) 2.9.3 Hard Rock (Blasting Prohibited) Cum 40.0

2 4.5.5 Providing/Laying cement concrete 1:3:6 (1 cement:3 sand: 6 graded stone aggregate 20 mm nominal size (M-10)

Cum 21.22

3 5.2.2 Providing/Laying cement

reinforced cement concrete 1:2:4 (1 cement 2 sand: 4 graded stone aggregate 20 mm nominal size)

Cum 228.0

4 5.22.1 Reinforcement for R.C.C work including straightening, cutting , bending, placing in position and binding all complete Mild Steel and medium tensile steel bars

Per Mt. 13.85

5 5.9.1 Centering and shuttering including structing, propping etc and removal of form for foundation, footings, bases of columns etc(Form Work) Sqm 970.0


Page 51

6 20.60.10

Supplying and laying in Position of M.S pipe as per approved design, drawing and specification including cutting welding testing, painting etc. Including Installation and erection of Penstock pipe

MT 79.0

7 Supplying and laying in position of Expansion Joints Lum-sum as per approved design, drawing and specification including Cutting, Welding, Testing, Painting etc.

L.S

8 2.3 Filling available excavated earth (excluding rock) in trenches, plinth, sides of foundation etc. layers not exceeding 20 cm in depth , consolidating each deposited layer by ramming and watering lead upto 50 m and lift upto 1.5m. Cum 1182.0

9 7.1 A Random Rubble masonry with hard stone in C.M.1:6

Cum 35.0

10. Providing & fixing of Pipe coat insulation 5 layer with bitumen 4 mm thick as per direction of E/I.

Sqm. 1529

11 Providing and fixing with gasket Set 6

12 Gates with Complete set

Set 1

13 Manhole Set

6

Total


Page 52

NOTE: Nothing extra shall be paid for head load/lead/lift for carriage/ transportation of

any material/equipment. The rates quoted above should indicate all the incidental

charges including construction of internal approach roads etc. and other utilities required

for the execution of the work, complete in all respects, and nothing extra shall be paid.


Page 53

DRAWINGS


Page 54

LIST OF DRAWINGS

NAME OF DRAWING NO. OF DRAWINGS

DRAWING NO.

FOREBAY TANK & PENSTOCK 6 No.

3.1 Plan and L-Section 1 of 6 T-07

3.2 L-Section of Penstock 2 of 6 T-08

3.3 L-Section of Forebay 3 of 6 T-09

3.4 Penstock Cross Sections 4 of 6 T-10

3.5 Cross Sections of Forebay 5 of 6 T-11

POWER HOUSE LAYOUT PLAN 1 No. T-15

POWER HOUSE-SECTIONS 2 No.

6.1 Cross Section 1 of 2 T-16

6.2 L-Section 2 of 2 T-17

3065.00

3070.00

3075.00

3080.00

RL

Chainage

3065.00

3070.00

3075.00

3080.00

3060.00

3055.00

3085.00

RL

Chainage

3065.00

3070.00

3075.00

3080.00

3060.00

3055.00

3050.00

RL

Chainage

3065.00

3070.00

3075.00

3060.00

3055.00

3050.00

RL

Chainage

3065.00

3070.00

3075.00

3060.00

3055.00

3050.00

RL

Chainage

3065.00

3070.00

3060.00

3055.00

3050.00

RL

Chainage

3065.00

3070.00

3060.00

3055.00

3050.00

RL

Chainage

3065.00

3070.00

3060.00

3055.00

3050.00

3045.00

RL

Chainage

RL

Chainage

3065.00

3070.00

3060.00

3055.00

3050.00

3045.00

3040.00 3040.00

3045.00

3050.00

3055.00

3060.00

3065.00

3070.00

RL

Chainage

3040.00

3045.00

3050.00

3055.00

3060.00

3065.00

3070.00

RL

Chainage

RL

Chainage

3040.00

3045.00

3050.00

3035.00

3055.00

3060.00

3065.00

RL

Chainage

3040.00

3045.00

3050.00

3035.00

3055.00

3060.00

3065.00

3070.00

RL

Chainage

3040.00

3045.00

3050.00

3035.00

3055.00

3060.00

3065.00

3070.00

RL

Chainage

3040.00

3045.00

3050.00

3035.00

3055.00

3060.00

3065.00

RL

Chainage

3040.00

3045.00

3050.00

3035.00

3055.00

RL

Chainage

3040.00

3045.00

3050.00

3035.00

RL

Chainage

3025.00

3030.00

3035.00

3020.00

RL

Chainage

3005.00

3010.00

3015.00

3000.00

RL

Chainage

2985.00

2990.00

2995.00

3000.00

2980.00

RL

Chainage

2965.00

2970.00

2975.00

2980.00

2985.00

2960.00

RL

Chainage

2960.00

2965.00

2970.00

2975.00

2980.00

LREDA TENDER DOCUMENT OF GENERAL & SPECIAL CONDITION Vol VI

Page 1

VOLUME-VI

Part– I GENERAL CONDITIONS OF THE CONTRACT

Part– II SPECIAL CONDITIONS OF THE CONTRACT


Page 2

CONTENTS

Section Title Page No.

I. GENERAL CONDITIONS OF THE CONTRACT 5-29

A. GENERAL 1. Definitions………………………………………………………………………5-7 2. Language and Law………………………………………………………………...8 3. Engineer – In- Charge’s decisions.………………………………………..............8 4. Delegation ………………………………………………………………………...8 5. Communications…………………………………………………………………. 8 6. Sub-Contracting …………………………………………………………………..8 7. Other Contractors…………………………………………………………… 9-11 8. Personnel…………………………………………………………………………11 9. Contractor’s Risks………………………………………………………........11-12 10. Developer Owner’s Risks…………………………………………………..........12 11. Contractor to Construct the Works……………………………………….......12-15 12. The Works to be completed by the Intended Completion Date………….......16-17 13. Approval of Contractors Temporary Works…………………………………17-18 14. Safety…………………………………………………………………………….18 15. Discoveries……………………………………………………………………….18 16. Possession of the Site…………………………………………………………….18 17. Access to the site……………………………………………………………..18-19 18. Instructions………………………………………………………………………19

Labor…………………………………………………………………………19-20 19. Protests………….………………………………………………………………20 20. Procedure for Disputes……………….…………………………………… …..21

B. Time Control 22

21. Program…………………………………………………………………………..22 22. Extension of the Intended Completion Date………………………………….22-24 23. Acceleration……………………………………………………………………...24

C. Quality Control 25

24. Identifying Defects………………………………………….................................25 25. Tests………………………………………………………………………...........25


Page 3

26. Defect Liability…………………………………………………………………..25 27. Uncorrected Defects after Completion Date……………………………………..25

Cost Control 26

28. Price Schedule……….…………………………………………………………...26 29. Changes in Price Schedule………………………………………………….........26 30. Deviations………………………………………………………………………..26 31. Cash Flow Forecasts……………………………………………………………..26 32. Payment Certificates……………………………………………………………..27 33. Payments………………………………………………………………..………..27 34. Extension of time……………………………………………………............. … 27 35. Tax………………………………………………………………………….........28 36. Currencies………………………………………………………………………..28 37. Price Adjustment………………………………………………………………...28 38. Retention…………………………………………………………………………28 39. Liquidated Damages……………………………………………………….....28-29 40. Advance Payment………………………………………………………………..29 41. Securities…………………………………………………………………………29 42. Cost of Repairs…………………………………………………………………...30

E. Finishing the Contract 31

43. Completion……………………………………………………………………….31 44. Taking Over………………………………………………………………...........31 45. Final Account…………………………………………………………………….31 46. Termination…………………………………………………………………..31-32 47. Payment upon Termination………………………………………………… 32-33 48. Property………………………………………………………………………….33 49. Force Majeure………………………………………………………………...33-35 50. Alteration/Addition & Omission……………………………………………….35 51. Testing and commissioning…………………………………………………….36 52. Certificate of final completion……………………………………………….36-37 53. No Interest on Contractor’s due……………………………………………….37 54. Abandonment of Works……………………………………………………37-39 55. Condition Repetition/Missing…………………………………………………39

II. SPECIAL CONDITIONS OF THE CONTRACT 40-66

1. General…………………………………………………………………………...40 2. Drawing and Specifications………………………………………………...........40


Page 4

3. Data to be furnished by the Contractor………………………………………….41 4. Construction Programme…………………………………………………...........41 5. Time-The Essence of Contract……………………………………………...........42 6. Power to vary or Omit Works……………………………………………………42 7. Housing Accommodation and Water Supply……………………………………43 8. Sufficient Means and Electrical Energy………………………………………....43 9. Working Hours…………………………………………………………………...43 10. Setting out Works………………………………………………………………..44 11. Changes in Designs………………………………………………………………44 12. Materials brought on Site……………………………………………………44-45 13. Contractor’s Representative and Workmen……………………………………..45 14. Contractor’s liability for loss, damage, accident etc…………………………45-46 15. Issue of Material…………………………………………………………………46 16. Ecological Balance…………………………………………………………...46-47 17. Accesss to the Contractor’s Book………………………………………………..48 18. Inspection and Tests………………………………………………………..........48 19. Examination and Tests on completion…………………………………………...49 20. Removal of Temporary work, plant and surplus material……………….………49 21. Laws and Regulations……………………………………………………………49 22. Fencing and Lighting…………………………………………………………….49 23. Patent Rights etc…………………………………………………………… …...50 24. Death Bankruptcy breach of Contract………………………………………50-51 25. Right of other contractor and Persons……………………………………………51 26. Suspension of work ………………………………………………………...........51 27. Payment for Civil Works…………………………………………………...........52 28. Income Tax and Sales Tax ………………………………………………………52 29. Safety Code…………………………………………………………………...53-59 30. Model Rules for the Protection of Health and………………………………..59-66

Sanitary arrangements for Workers


Page 5

SECTION- I

GENERAL CONDITIONS OF THE CONTRACT

In construing these General conditions and Special conditions, the following words shall

have the meanings herein assigned to them:

1 DEFINITIONS

1.1 “Governor” shall mean The Governor of Jammu & Kashmir, India.

“Government” shall mean the Govt. of Jammu & Kashmir, India.

“Department” means MNRE, LREDA-LAHDC

“LREDA and LAHDC” shall mean the Ladakh Renewable Energy Development

Agency and Ladakh Autonomous Hill Development Council respectively, or their

successors, assigns or representatives.

“DC/CEO” shall mean The Deputy Commissioner/ Chief Executive Officer,

Ladakh Autonomous Hill Development Council Leh.

“The Developer/Owner” is the party who will employ the Contractor to carry

out the Works, LREDA-LAHDC being the Developer/Owner of the said works.

“The Engineer-in-Charge” is the person named in the Contract or any other

person employed by the Developer/Owner and notified to the Contractor who is

responsible for supervising the work, administering the Contract, certifying

payments due to the Contractor, issuing and valuing Variations to the Contract,

awarding extension of time and valuing the Compensation Events.

“The Contract” shall mean the NIT, instructions and information for tenderers,

general and special conditions of contract, specifications, drawings, tender

(including the schedule of quantities and bid price), the formal agreement signed

between the parties and all addenda and attachments related to above and the

tender forms.


Page 6

“The Contractor” is a person or corporate body whose bid to carry out the

Works has been accepted by the Developer/Owner.

“The Works” are what the contract requires the Contractor to execute,

construct, install and hand over to the Developer/Owner in accordance with the

contract.

“Letter of Intent” shall mean the letter to the successful bidder by the

Developer/Owner intimating that his bid has been found acceptable and that the

work will be awarded to him after completion of various formalities as stipulated

in the bid document.

“Acceptance” is the date when the Contract came into existence upon receipt by

the Contractor of the Letter of Acceptance issued by the Developer/Owner.

“The Initial Contract Price” is the Contract Price at the date of the

Developer/Owner’s written acceptance of the Bid.

“The Contract Price” is the price stated in the Letter Acceptance and

thereafter as adjusted in accordance with the provisions of the Contract.

“Drawings” shall mean collectively all accompanying general drawings as well

as all detailed drawings or reproductions thereof, which show the locations,

character and details of the work to be done, issued/approved by the Engineer-in-

Charge from time to time during the period of the contract.

“I.S.S./B.I.S” shall mean Indian Standard Specifications/ Bureau of Indian

Standards.

“The Site” shall mean the site where the work is to be executed under the

contract and such land in vicinity of the work as may be modified by the

Engineer-in-Charge.


Page 7

“Site Investigation Reports” are those which are included in the Bid documents

and the factual and interpretative reports about the ground and groundwater

conditions at the site.

“Equipment” is the Contractor’s machinery and vehicles brought temporarily to

the site necessary for the execution of the work according to specifications.

“Temporary Works” are works designed, constructed, installed, and removed

by the contractor which are needed for construction or installation of the Works.

“A Deviation/ variation” is an instruction given by the Engineer-in-Charge

which varies the scope of Work.

“The Intended Completion Date” is the date on which it is intended that the

Contractor shall complete the Works. The Intended Completion Date is specified

in the Contract. The Intended Completion Date may be revised by the Engineer-

in-Charge by issuing an extension of time.

“The Completion Date” shall mean the successful completion of the entire

works, including any testing and cleaning required at site, have been completed

and work is made ready for commercial use.

“A Defect” is any part of the Works not completed in accordance with the

Contract.

“ The Arbitrator” is the person appointed jointly by the Developer/Owner

and the Contractor to resolve disputes in the first instance as provided for in

Clauses.

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

also means female, and vice versa.


Page 8

2 LANGUAGE AND LAW

2.1 The language of the Contract shall be English.

3 ENGINEER IN-CHARGE

Duties, Authority and Decision

3.1 The duties of the Engineer-in-charge are to watch and supervise the works, get

them completed strictly in accordance with the approved drawings subjected to

any authorized variation modification thereof and examine materials used or

workmanship employed on or in connection with the works.

3.2 The Developer is authorized to make any variation of or in the work and the

contractor shall execute and complete the works through his technical staff and

engineers to the entire satisfaction of the Engineer-in-charge.

3.3 The Engineer-in-Charge is to decide contractual matters between the

Developer/Owner and the Contractor fairly and impartially.

4 DELEGATION

4.1 The Engineer-in-Charge may delegate any of his duties and responsibilities to

other people except to the arbitrator after notifying the Contractor and may cancel

any delegation after notifying the Contractor.

5 COMMUNICATIONS

5.1 Communications between parties, which are referred to in the conditions, are

effective only when in writing. A notice is effective only when it is received.

6 SUB-CONTRACTING

6.1 The Contractor may subcontract with the permission of the Engineer-in-Charge

but may not assign the Contract without the approval the Developer/Owner in

writing. Subcontracting does not alter the Contractor’s obligations.


Page 9

7 OTHER CONTRACTORS

7.1 The Developer may undertake or award other contract for additional work at or in

the vicinity of the work site and the contractor shall fully co-operate with such

other contractor and shall carefully fit his own work to such additional work as

may be directed by the Engineer-in-Charge. The contractor shall not commit or

permit any act that will interfere with the performance of work by any other

contractor. The contractor shall permit without charge such other contractor to use

the roads, lightning installations and any other facilities constructed for or

acquired by the contractor for use in the performance of work.

Opportunities for other contractors

7.2 The Contractor shall in accordance with the requirements of the Engineer-in-

Charge, afford all reasonable facilities to any other contractor employed by the

J&K Govt. and their workmanship and the workmen of the other Department and

of any other properly authorized authorities or statutory bodies who may be

employed in the execution on or near the site of any work not included in the

contract in any other contract which the contract which the Engineer-in-Charge or

the Government, may enter into in connection with or ancillary to the works.

The Contractor shall work in harmony with the other Contractors on the site and

shall take note of any information with respect to the requirements of other

contractors made available to him at meetings called by the Engineer-in-Charge

and arrange his works programme to meet such requirements as far as possible.

Clearance of site on completion

7.3 On completion of the works the contractor shall clear away, load into trucks or

any other transport remove from the site all constructional plants, surplus

materials dismantled and otherwise, earth rubbish and temporary works of every

kind and leave the whole of the site and work clean and in a workmen like

condition to the satisfaction to the Engineer-in-charge.

All surplus earth, rubbish, dismantled and surplus materials shall be removed as

per 7.3 above and dumped or stacked anywhere in departmental area within a

some radius to the satisfaction of the Engineer-in-charge, unless otherwise direct.


Page 10

Sufficiency

7.4 The contractor shall be deemed to have satisfied himself before tendering as to the

site conditions, scope of the contract practicability and suitability of the method of

working and to the correctness and sufficiency of the tender for the works and his

tender shall cover all his obligations under the contract and all matters and things

necessary for the proper execution and completion of work.

7.5 The contractor shall not be entitled to any extra payment and not to resile from the

contract for reasons arising out of in-sufficiency of his tender.

Watching and Lighting

7.6 The Contractor shall, in connection with the works, provide and maintain at his

own cost, all lights, guard, fencing and watching when and where necessary or

required by the Engineer-in-charge or by competent authority for the protection of

the works or for the safety and convenience of the public.

Interference with existing road & traffic

7.7 All operations necessary for the execution and completion of the works and for

the construction of any temporary works, shall comply with the requirement of

the Contract and be carried on so as not to interfere un-necessarily or improperly

with the public convenience of the access to use and occupation of public or

private roads and foot paths whether in possession of the J&K Government, or

any other persons. The contractor shall save harmless and indemnify the J&K

Government in respect of all claims, demands, actions, proceedings, damages,

costs, charges and expenses whatever, arising out of or in relation to any such

matters.

Contract Valid even after certificate of final completion

7.8 Notwithstanding the issue of the certificate of final completion, the contractor and

the Developer/Owner shall remain liable for the fulfillment of any obligation

incurred under the provisions of the contract prior to the issue of the certificates of

final completion which remains unperformed at the time such certificate is issued

and for the purpose of determining the nature and extent of any such obligation,

the contract shall be deemed to remain in force between the parties hereto.


Page 11

7.9 The contractor shall comply in all respects with the provisions of all laws and

rules enacted by Parliament or Legislature and authority, body or department

which may be applicable to the works and shall always indeminify the J&K

Government against all penalities and liabilities for break of any such law, rules,

regulations or by-laws.

Nothing in the contract authorities the contractor or his employees to trespass

upon or injure or damage any property, belonging to State or to private

indivisuals, parties, or local bodies and the contractor shall at all times save

harmless the J&K Government against all costs, compensation and expenses or

charges of any sort arising out of such trespass or injury/damage.

8 PERSONNEL

8.1 The Contractor is to employ the key personnel named in the schedule of key

personnel approved by the Engineer-in-Charge. The Engineer-in-Charge will

approve proposed replacement of key personnel only if their qualification,

abilities and relevant experience are equal or better than those of the personnel

listed in the Schedule.

8.2 If the Engineer-in-Charge asks the Contractor to remove a person who is a

member of his staff or his work force on genuine grounds, the Contractor is to

ensure that the person leaves the site within seven days and has no further

connection with the work in the Contract.

9 CONTRACTOR’S RISKS

Documents mutually explanatory

9.1 The Tender Documents as defined in “Notice Inviting Tender” together with the

agreement are to be taken as mutually explanatory of one another. Should there

be any discrepancy, ambiguity, omission or error in various tender documents,

the Developer shall have the power to correct the same and his decision shall be

final and binding on the contractor.


Page 12

Agreement

9.2 The Contractor shall, after acceptance of his tender, when called upon to do so,

enter into and execute an agreement at his own cost, until such agreement is

duly executed, the letter inviting tender, instructions for tenderer, the conditions

of contract, specification, schedule of prices, Drawings and the tender together

with the acceptance thereof, shall be deemed to be the contract, Six copies of

the agreement will be supplied by the contractor to the Engineer-in-charge in

the book bound form without any extra charge.

9.3 All risk of loss or damage to physical property and of personal injury that may

arise during and in consequence of the performance of the Contract other than

the excepted risks is the responsibility of the Contractor.

10 DEVELOPER/OWNER’S RISKS

10.1 The Developer/Owner is responsible for the excepted risks which are in

so far as they directly affect the execution of the work in the

Developer/owner’s country, the risks of war, ,hostilities, invasion, act of

foreign enemies, rebellion, insurrection or military or usurped power, civil

war, riot, commotion or disorder (unless restricted to the Contractor’s

employees),and contamination from any unclear fuel or unclear waster or

radioactive toxic explosive, or (b) a cause due solely to the design of the

Works, other than the Contractor’s design. (c) Any hindrances like forest

department, local land disputes.

11 CONTRACTOR TO CONSTRUCT THE WORKS

11.1 The Contractor shall construct and install the Works in accordance with

the Specifications and Drawings as approved by the Developer.

Various components of works (Civil Works Complex)

i) Head Works Weir/Trench weir

ii) Head Regulator with gate system


Page 13

iii) Approach channel

iv) Desilting Tank

v) Forebay and Gates/Trash Rack

vi) Spillway structure

vii) Civil Works of (Penstock Bell mouth and gates)

viii) All Flushing pipes/Desilting pipes

Work to be Satisfactory

11.2 The contractor, shall construct, supply, deliver, erect the works in strict Accordance with the approved drawings and specifications, terms and

conditions of the tender documents and the provisions of the Contract and

to the entire satisfaction of the Engineer-in-charge and shall comply and

adhere strictly to the Engineer-in-charge instructions and directions or any

matter (whether mentioned in the contract or not).

Programme to be furnished

11.3 As soon as practicable, after the acceptance of his tender, the Contractor

shall submit to the Engineer-in-charge for his approval, programme

showing the order or procedure and method in which he purposes to carry

out the works and shall whenever required by the Engineer-in-charge

furnish for his information particulars in writing of the Contractor

arrangements for carrying out the works and of the constructional plant

and temporary works which the Contractor intends to supply, use or

construct as the case may be. The submission for the approval by the

Engineer-in-charge of such programme shall not relieve the Contractor of

any his duties or responsibilities under the Contract.

Contractor’s Superintendence

11.4 No one shall be recognized as Contractor’s agent for the work unless and

until approved in writing by the Engineer-in-charge. Such written approval

may at any time be withdrawn by the Engineer-in-charge, without

assigning any reason.


Page 14

The Contractor or his authorized agent shall be constantly present on the

work and give him whole time to superintendence of the same. He or his

authorized agent should always be available at work site to receive

instructions and directions from the Engineer-in-charge.

Contractor’s Engineering Staff

11.5 The Contractor will engage or employ an experienced and competent

Engineer (as per pre-qualification condition) and technical staff to execute

and speed up the progress of work and to ensure quality of work as per

standard specifications

Setting Out

11.6 The Contractors shall be responsible for true and proper setting out of

work, correctness of the position, levels dimensions and alignment of all

parts of the works. The Contractor shall rectify at his own expense any

error in the position, dimensions, alignment of any part of work whenever

it occurs of his own or o being required to do so by the Engineer-in-charge

The Contractor shall carefully protect and preserve all B.M’s sight rails

pegs and other reference used in setting out of work.

Contractor’s responsibility for method of work

11.7 The Contractor shall be responsible for the practicability and suitability of

his method of working not withstanding that such method may have been

approved by the Engineer-in-charge.

The Engineer-in-charge shall not be responsible for any plant or temporary

works of the contractor notwithstanding that the Engineer shall have

approved of the same or any drawings submitted by him.

Contractor’s responsibility for measurement and record of works

11.8 The Contractor’s Engineer shall maintain up to date record of works and

its measurements in a properly bound work Register, Cross-section Books,

and the Contractor shall sign all such documents regularly as a token of

acceptance failing which the records maintained by the Engineer-in-charge

shall be final and binding on the contractor.


Page 15

Quality of materials and workmanship

11.9 All materials and workmanship shall generally be of the best quality and

of standard specifications as described in the approved drawings or the

book of technical specification or in accordance with the Engineer-in-

charge instructions and shall be subjected from time to time such tests as

the Engineer may direct. The Contractor shall provide all assistance, labor,

materials and samples for carrying out such tests as and when required by

the Engineer-in-charge.

Where no particular specifications are given, the materials used and

workmanship employed shall in all respects be in accordance with the

relevant IS, ISS/BIS standards specifications/approved guides and

manuals, to the satisfaction of the Engineer-in-charge.

Rate of progress

11.10 The contractor shall maintain sufficient progress of work so as to ensure

completion of works within the prescribed period of completion or

extension thereof (if any accord).

Should the rate of progress of work or any part thereof at any stage (in the

opinion of the Engineer-in-charge) be too slow to ensure completion of

work within the prescribed time of completion the Engineer-in-charge

shall after giving one weeks written notice to the Contractor expedite the

progress by: i). Augmenting labor and materials of Contractor and/or

ii). Getting part or whole of the balance work executed departmentally

through some other agency and its cost shall be deducted from

Contractor’s bill payment.

Supply and Issue

11.11 Except where otherwise specified, the contractor shall at his own expenses

supply and provide all the constructional plant, temporary works,

dewatering and equipment (including the supervision thereof) transport to

or from the site and in about the works, including loading and unloading,

fencing, storage, watching, lighting and other things of every kind

required for the execution and completion of works.


Page 16

Dewatering

11.12 The Contractor shall make his own arrangement for dewatering including

procurement of dewatering plant and equipments. The Contractor’s items

rates should be inclusive of dewatering and no extra payment is to be

made for the quality of dewatering involved.

12 THE WORKS TO BE COMPLETED BY THE INTENDED

COMPLETION DATE

12.1 The Contractor shall commence the Works on the start Date and carry out

the Works in accordance with the approved drawings and specifications,

and complete them by the Intended Completion Date.

12.2 The contractor shall not executive any PCC or RCC work in the absence

of departmental representative and contractors qualified Engineer.

12.3 The contractor’s Engineer will maintain day to day progress in the work

registered and Measurement Book and which shall be verified by

Departmental Engineer from time to time.

Commencement

12.4 The Contractor shall commence the work on receipt by him an order in

writing by the Project Director LREDA-LAHDC/Developer to this effect.

The Engineer-in-charge shall give to the Contractor possession of such

portion of the site that may, in the opinion of the Engineer-in-charge, be

required to enable the Contractor to process with work with due speed, if

the Contractor suffers delay or incurs expenses from failure on the part of

the Engineer-in-charge to give possession of the site within a reasonable

time in accordance with the provisions of claims, the Director LREDA

may grant as extension of time for completion of the work. No other

claims, however, be entertained by the LREDA on this account.


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Contractor’s Area

The land required by the Contractor for his stores labor sheds, office may

be made available to him by the Engineer-in-charge, to extent possible.

The allocation of land to the Contractor shall not affect the right of the

LREDA/Developer to complete freedom of access to all parts of the works

and to carry out any work in place that may be required by him.

Time for completion

12.5 The work shall be completed in all respects, and handed over within the

specified time of completion calculated from the date of issue of allotment

order in writing by the Developer/Owner to commence the work, or such

extended time as may be allowed under clause 12.4 & 22.3 hereof. As

soon as, in the opinion of the Engineer-in-charge the work shall have been

completed and passed all necessary tests, the Engineer-in-charge shall

issue a certificate of completion in respect of the work. The date of issue

of this certificate shall be deemed to be the date of completion of the

works. The Engineer-in-charge shall not, however delay the issue of this

certificate on account of minor deficiencies or the defects in the works

which do not effects its commercial use provided that the Contractor shall

undertake in writing to make good or to set right same within a specified

time limit. In such case, part of the security deposit due to the Contractor

shall be retained by the Engineer-in-charge till all such defects are

removed or rectified.

13 APPROVAL OF THE CONTRACTOR’S PERMANENT WORKS

13.1 The Contractor is to submit drawings and specifications showing his

proposed Temporary/Permanent works to the Engineer-in-charge, who is

to approve them if they comply with the Specifications & Drawings.


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13.2 The Contractor is responsible for the design of Temporary/Permanent

Works.

13.3 The Engineer-in-Charge’s approval shall not alter the Contractor’s

responsibility for design of the Works.

14 SAFETY

14.1 The Contractor is responsible for the safety of all activities on the Site.

15 DISCOVERIES

15.1 Anything of historical or other interest or of significant values

unexpectedly discovered on the site is the property of the

Developer/Owner. The Contractor is to notify the engineer in charge of

such discoveries and carry out his instructions for dealing with them.

16 POSSESSION OF THE SITE

16.1 The Developer/Owner shall give possession of all parts on the Site to the

Contractor.

The site will be handed over to the Contractor along with various roads in

the projects area on “as is where is” basis. All further works in respect of

internal projects roads and other infrastructure facilities as also their

maintenance during construction period required for the Works will be

done by the Contractor. The necessary cost in respect of these works is

deemed to have been included within the Contract Price.

17 ACCESS TO THE SITE

17.1 The contractor shall allow any person authorized deputed by the Engineer

in-charge access to the Site and to any place where work in connection

with the Contract is being carried out or intended to be carried out.


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Inspection and access to work

17.2 The Engineer-in-charge shall at all reasonable times have access to the

work and to the site and to all workshop, stores and places where work is

being executed and when materials, manufactured articles are being

obtained and to inspect and examine the materials and workmanship and

to makes tests on samples of work during execution.

In case of all tests whether carried out at the premises of the contractor or

of any sub-contractor (except where otherwise specified) the contractor

shall provide, free of charges, such labor, materials, electricity, fuel, water,

stores, as may reasonably be demanded to carry out efficiently such tests

in accordance to the Engineer-in-charge to accomplish such testing.

18 INSTRUCTIONS

18.1 The Contractor shall carry out all instructions of the Consultant/Site

Engineer-in-Charge deputed which comply with the applicable laws in

which the Site is located.

18.2 The Contractor shall permit the bank to inspect the Contractor’s accounts

& records relating to the performance of the Contract & to have them

audited by auditors appointed by the Bank, if so required by the Bank.

LABOR

18.3 The contractor shall make his own arrangements for labor, their transport,

lodging, rations, medical aid etc and shall at all times during the contract period

comply in all respects with labor laws and regulations in vogue. The Contractor

shall not at any time give, sell or barter any alcoholics liquor drugs or arms and

ammunition or allow any such gifts, sale, or barter by his employees, agents and

labors.

The Contractor shall also provide the basic amenities, like labor sheds water

supply and sanitary facilities for the labor employed.


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The Contractor shall at all times indemnify the J&K Govt. against all claims,

damages or compensation arising out of any accident or injury to his workmen or

employees.

Payment to labor

18.4 The Contractor shall make timely payments to the labor employed by him and

incase of complaints of non-payment of due the same shall be paid by the

Engineer-in-Charge after due verifications, out of the dues of the Contractor.

Local customs & festivals

18.5 The Contractor, his agents and employees shall in all their dealings with labor

employed on or in connection with the work, have dues regard to all general and

local religious festivals and other customs.

Supply of Labor to Department

18.6 The Contractor shall supply to the Engineer-in-Charge, as and when required by

the latter labor on daily wages basis for which payment will be made to the

Contractor in accordance with the provisions of the State P.W. Accounts Code.

PROTESTS AND CLAIMS

19 PROTESTS

19.1 If the Contractor believes that the decision taken by the Engineer-in-

Charge was either outside the authority given to Engineer-in-Charge by

the Contract or that the decision was wrongly taken, the contractor may

within 15 days after the receipt of the written instruction and decision may

file a protest with the Engineer-in-Charge stating clearly and in detail the

basis of his objection. Except for such protest or objections, as are made

on record in the manner herein specified, and within the time limit stated,

the records, ruling, instructions or decision of the Engineer-in-Charge

shall be conclusive and binding on the contractor.


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20 PROCEDURE FOR DISPUTES

Settlement of disputes

20.1 If any dispute or difference of any kind whatsoever shall arise between the

Engineer-in-charge and the contractor in connection with or arising out of

the contract it shall be referred to and settled by the Deputy

Commissioner/CEO Leh, who shall act as an arbitratory under the J&K

Arbitration Act. His decision on all points shall be final and binding on the

parties..

Jurisdiction Court

The contract shall be deemed to have been entered into at Leh and within

the Civil Jurisdiction of the J&K High Court and its interpretation shall be

governed by J&K State Contract Act or any modification thereof


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TIME CONTROL

21 PROGRAM

21.1 Within 30 calendar days from the issue of the order to commence the

work, the Contractor shall submit to the Engineer-in-Charge for his

approval, a program showing the complete works program, general

methods, arrangements, order, and timing for all the activities in the

Works.

21.2 An update of the program is a program showing the actual progress

achieved of each activity and the effect of the programme achieved on the

timing of the remaining work including the changes of the sequence of the

activities.

21.3 The Contractor shall submit to the Engineer-in-Charge for approval, an

updated program at regular intervals as specified under various clauses of

the contract.

22. EXTENSION OF THE INTENDED COMPLETION DATE

22.1 The Engineer-in-Charge shall extend the Intended Completion Date if a

Compensation Event occurs or a Variation is issued which make it

impossible for completion to be achieved by the Intended Completion

date.

22.2 The Engineer in-charge is to decide whether and by how much to extend

the Intended Completion Date within 30 days of the Contractor asking him

to decide upon the effect of a Compensation Event or Variation and

submitting full supporting information. If no written objection is raised by

Engineer in-charge within 30 days of the contractor’s application, the

extension applied will be approved.


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Extension of time of completion

22.3 Should the amount of extra or additional work of any kind or the alteration

in design or other special circumstances including exceptional weather

conditions, civil commotion, strike, or lock out and provisions under

clauses 12.5 above be such as to delay the completion of the work, the

Contractor shall apply in writing to the Engineer-in-charge for the

extension of time for the completion of the work within15 days of such

occurrence but before the expiry of the stipulated date of completion. The

Engineer-in-charge may determine the period of such extension and

recommend to the Director LREDA/developer for sanction of the same

and waiving of the application of clauses 22.4 of liquidated damage for

delay for such extended period. No extra payment shall be made to the

Contractor or any account for such extension of the contract period.

Liquidated Damage for delay

22.4 If the Contractor shall fail to complete the work within the prescribed time

period or the sanctioned extended time, the Contractor shall pay to the

Engineer-in-charge/Owner a sum equivalent to one half percentage of the

Contractor’s prices (subjected to a maximum of 10% of the contract value)

as liquidated damage for such default for every week or part of a week

which shall elapse between the prescribed time of completion and the

actual date of completion. The Engineer-in-charge without any prejudice

to any other method of recovery deduct the amount of such damage from

any money due or which become due to the Contractor .The payement or

deduction of such damages shall not relieve the Contractor from any

obligation or liabilities under the contract and his obligations to complete

the works.


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Penalty for Default

22.5 In the event of Contractor’s failure or default in the performance of the

terms and conditions of the contract, not expressly provided for herein, the

Contractor shall be liable to pay a penalty not exceeding up to 10% of the

contract value.

23 ACCELERATION

23.1 When the Developer/Owner wants the Contractor to finish before the

Intended Completion Date, the Consultant/Engineer-in-Charge obtains

priced proposal for achieving the necessary acceleration from the

Contactor.


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QUALITY CONTROL

24 IDENTIFYING DEFECTS

24.1 The Engineer-in-Charge shall check the Contractor’s work and notify the

Contractor of any Defects which he finds. Such checking does not affect

the Contractor’s responsibilities. The Engineer-in-Charge may instruct the

Contractor to search for a defect and test any work which he considers

may have a defect.

25 TESTS

25.1 If the Engineer-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 test shows that it does, the contractor shall pay for the test and any

samples. If there is no defect the test shall be a Compensation Event.

26 DEFECT LIABILITY

26.1 The Engineer-in-Charge shall give notice to the Contractor of any Defect

of which he is aware before the end of the Defects Liability Period.

26.2 Every time notice of a Defect is given, the Contractor shall correct the

notified Defect within the length of time specified by the Engineer-in-

Charge’s notice.

27. UNCORRECTED DEFECTS

27.1 If the Contractor has not corrected a Defect within the time specified by

the Engineer-in-Charge or six months whichever is higher, the Engineer-

in-Charge may employ any other person to make good such defect and the

expenses consequent thereof and incidental thereto shall be borne by the

contractor.


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COST CONTROL

28. PRICE SCHEDULE

28.1 The Price Schedule contains prices for the Planning, Design, Engineering,

Fabrication, Supply and Civil Construction Works (including Gates Trash

Racks and Lifting) Testing, Commissioning and maintenance of Civil

Works for one year is to be done by the Contractor.

29. CHANGES IN THE PRICE SCHEDULE

29.1 If the final quantum of the work by the Contractor differs from the

quantum originally contracted for a particular component as a result of

changes in the dimensions of the structures with the prior approval of the

Engineer-in-Charge, the Contract price will be adjusted to allow for the

deviations in accordance with the rates furnished by the Contractor for

deviations upto +30%. The rates for extra quantities and deviated items

beyond 30% variation shall be mutually agreed between the contractor and

the Developer, or contractors above/below percentage for other items or

rates prevailing in the area for similar nature of work shall apply.

29.2 Any dispute in settling the amount for the above deviations the matter will

be decided by the Adjudicator. The contractor cannot stop the works at an

excuse arising out of dispute on this account.

30 DEVIATIONS

30.1 All Deviations are to be included in updated Program produced by the

Contractor.

31 CASH FLOW FORECASTS

31.1 When the program is updated the Contractor will provide the Engineer-in-

Charge with an updated cash flow forecast.


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32. PAYMENT CERTIFICATES

32.1 In the first week of the month, the Contractor shall submit to the

“Engineer-in-Charge monthly/bi-monthly or quarterly statements of the

estimated value of the work completed until the preceding months less the

cumulative amount certified previously.

Ceiling for payment:

If there is any delay due to change of drawing/specification by the Developer or

extra time taken in conveying decision or approval by the Developer or Owner

and the period of delay exceeds by month, the contractor can apply for extension

of time for completion which will be examined and required and proportionally

time period shall be extended

The minimum value of work done should be not less

than Rupees 15.00 lakhs or 10% of the estimated cost of work, whichever

is higher. The contractor can submit his claims for payment after fulfilling

the ceiling condition.

32.2 The Engineer-in-Charge shall check the Contractor’s monthly/bi-monthly

or quarterly statement and certify the amount to be paid to the Contractor.

32.3 The value of work completed will be verified by the Engineer-in-Charge.

32.4 The value of work completed includes the valuation of Variations,

advance payments, Compensation Events and deduction for retention.

33. PAYMENTS

33.1 The Developer/Owner have to pay the Contractor the amounts certified by

the Engineer-in-Charge within a period of one month.

34. EXTENSION OF TIME

34.1 Delay in approval if Specification Drawings/Changes


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35. TAX

35.1 The Contractor shall be responsible for payment of all taxes/duties/levies

etc. connected with the activities of the contract for execution of work

under the contractual obligations.

36. CURRENCIES

36.1 All payments shall be made in Indian Rupees.

37. PRICE ADJUSTMENT/ESCALATION OF RATES

37.1 No escalation in rates/price adjustments is allowed and the contractors

allotted rate will remain valid till completion and commissioning of the

project.

38. RETENTION

38.1 The Developer/Owner shall retain from each payment due to the

Contractor, 10% of the amount as security, limited to initial Contract Sum

in shape of deduction from bill or FDR or BG.

38.2 On completion of the whole of the works, the total amount retained is

repaid to the Contractor, when the Defects Liability Period of one year has

passed and the Engineer-in-Charge has certified that all Defects notified

by him to the Contractor before the end of this period have been corrected.

38.3 On completion of the whole works the Contractor may substitute retention

money with an “on demand’ Bank Guarantee.

39. LIQUIDATED DAMAGES

39.1 The Contractor shall pay liquidated damages to the Developer/Owner at

the rate of ½ % weekly, restricted to 10% of the Contract sum, if the

Completion Date is later than the Intended Completion Date. The

Developer/Owner may deduct liquidated damages from payments due to


Page 29

the Contractor. Payment of liquidated damages does not affect the

Contractor’s liabilities.

39.2 If the Intended Completion Date is extended after liquidated damages have

paid, the Engineer-in-Charge shall correct any overpayment of liquidated

damages by the Contractor by adjusting the next payment certificate. The

Contractor shall be paid interest on the overpayment, calculated from the

date of payment to the date of repayment as specified in sub – clause 33.1

40. ADVANCE PAYMENT

40.1 The Developer/Owner shall make advance payment to the Contractor @

15% of Contract sum, against provision by the Contractor of an

unconditional Bank Guarantee issued by nationalized/ scheduled bank, in

amounts equal to the advance payment. The guarantee shall remain

effective until the advance payment has been repaid by the Contractor.

Interest will not be charged on the advance payment.

40.2 The Contractor has to use advance payment to pay for material, equipment

and mobilization expenses required specifically for execution of the

Works.

40.3 The advance payment is repaid by deducting proportionate amounts from

payments due to the Contractor.

41. SECURITIES

41.1 The Performance security shall be provided to the Developer/Owner no

later than the date specified in the Letter of Acceptance & shall be issued

in an amount acceptable to the Developer/Owner in the form of FDR/Bank

Draft or Bank Guarantee issued by a nationalized/scheduled bank, and

denominated in Indian Rupees. The performance Security shall be valid

for six months after the date of Completion or extension period approved


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by the Engineer-in-Charge. The Performance security bank Guarantee

should be renewed 25 days before its expiry.

42. COST OF REPAIRS

42.1 Loss or damage to the Works or materials to be incorporated in the Works

between the Start date and before hand-over of the site to the

Developer/Owner shall be remedied by the Contractor to the Contractor’s

cost if the loss or damage arises from the Contractor’s acts or omissions.

42.2 The contractor shall maintain the works for one complete year (including

one winter season). The cost of any defect or damages found in the works,

are to be borne/maintained by the contractor at contractors cost.


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FINISHING THE CONTRACT

43. COMPLETION

43.1 The Engineer-in-Charge will issue the Certificate of Completion of work

to the Contractor when he decides that the Work is completed.

44. TAKING OVER

44.1 The Developer/Owner shall take over the Site and the Works within seven

days of the Engineer-in-Charge issuing a certificate of completion. On

completion of work as per the contractor, if Engineer in-charge does not

give the completion certificate within 30 days, the dispute will be settled

by the Adjudicator.

45. FINAL ACCOUNT

45.1 The Contractor shall supply to the Engineer-in-Charge a detailed account

of the total amount that the Contractor considers payable under the

Contract before the end of the Defects Liability Period. The Engineer-in-

Charge shall issue a Defect Liability Certificate & certify any final

payment which is due to the Contractor within 30 days of receiving the

Contractor’s account if it is correct and completed. If it is not, the

Engineer-in-Charge shall issue a schedule which state the scope of

corrections or additions that are necessary. If the final account is still

unsatisfactory after it has been resubmitted, the Engineer-in-Charge shall

decide on the amount payable to the Contractor and issue a payment

certificate.

46. TERMINATION

46.1 The Developer/Owner or the Contractor may terminate the Contract if the

other party causes a fundamental breach of the Contract.

46.2 Fundamental breaches of contract include, but are not limited to


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(a) The Contractor stops work for 28 days without giving notice to the

Engineer-in-Charge when no stoppage of work is shown on the

current program.

b) The Developer/Owner or the Contractor is made bankrupt or goes

into liquidation other than for reconstruction or amalgamation.

(c) A payment certified by the Engineer-in-Charge is not paid by the

Developer/Owner within 30 days of the date of the Engineer-in-

Charge ’s certification.

(d) The Engineer-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

despite repeated notices.

46.3 When either party to the Contract gives notice of a breach of contract to

the Chief Executive Officer/Deputy Commissioner , the Chief Executive

Officer/Deputy Commissioner and Arbitrator shall decide whether the

breach is fundamental or not.

46.4 Notwithstanding the above, the Developer/Owner may terminate the

Contract at his convenience.

46.5 If the contract is terminated the Contractor shall stop work immediately,

make the site safe and secure and leave the site within 10 days of such

order of termination of work.

47. PAYMENT UPON TERMINATION

47.1 If the Contract is terminated on a fundamental breach of Contract by the

Contractor, the Engineer-in-Charge shall issue a certificate for the value of

the work done less advance payments received up to the date of the issue

of the certificate and less the percentage of the value of the work not


Page 33

completed. Additional Liquidated Damages shall not apply. If the total

amount due to the Developer/Owner exceeds any payment due to the

Contractor, the difference shall be a debt payable to the Developer/Owner.

47.2 If the Contract is terminated at the Developer/Owner’s convenience or

because of a fundamental breach of Contract by the Developer/Owner, the

Engineer-in-Charge shall issue a certificate for the value of the work done,

the reasonable cost of removal of equipment, repatriation of the

Contractor’s personnel employed solely on the Works, and Contractor’s

cost of protecting and securing the works, less advance payments received

up to the date of the certificate.

48 PROPERTY

48.1 All material on the Site, Plant, Equipment owned by the Contractor,

Temporary Works and Works, are deemed to be the property of the

Developer and are at his disposal if the Contract is terminated because of

Contractor’s default

49. FORCE MAJEURE

Force Majeure is herein defined as any cause which is beyond the control

of the Contractor or the Developer/Owner as the case may be which they

could not foresee or with a reasonable amount of diligence could not have

been forseen and which substantially affects the performance of the

Contract, such as:

a) Natural phenomena like adverse unprecedented climatic conditions,

floods (exceeding estimated magnitude) climatic conditions, floods,

droughts, earthquakes and epidemics.

b) Acts of any Government domestic or foreign, including war

(declared or undeclared), priorities, quarantines, embargoes, civil

war rebellion, revolution, insurrection, military or usurped power.


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c) Country wide and/or region wide and/or trade union wide strikes

causing disruption of works (otherwise than amount Contractor’s

employees).

Provided either party shall within fifteen (15) days from the occurrence

and termination of such a cause notify the other in writing of such causes

giving full particulars and satisfactory evidence in support thereof.

The Contractor or the Owner shall not be liable for delays in performing

his obligations resulting from any force majeure cause as referred to

and/or defined above. The date of completion will, subject to hereinafter

provided be extended by the reasonable time even through such cause may

occur after Contractor’s performance of obligation has been delayed for

other causes.

Damage to Work

From the commencement to the completion of the works, the Contractor

shall be responsible for any damage or loss to the work or any part thereof

from any cause whatsoever (save & except the force majeure as defined in

clause 49 hereof). The Contractor shall at his own cost repair and make

good the loss or damage in conformity (in every respect) with the

requirements of the contract and the instructions of the Engineer-in-

charge.

In the event of any such damage or loss happening from any of the

“Expected risk” the Contractor shall, if and to the extent required by the

Developer/Owner repair and make good the same as aforesaid at the cost

of Developer/Owner on the rates terms and conditions of this contract.

Force Majeure

The “Expected risks”/Force Majeure are war hostilities invasions,

rebellion, intrusion of military or usurped power, civil war, riots and


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commotion (other than among the Contractor’s own employee or labor),

earth quakes, lightening, unprecedented floods(having magnitude more

than estimated value) and unprecented rain/snow.

Damage to person & property

The Contractor shall take every practicable precautions not to damage any

adjoining property or immovable (including the property of the Developer

or injure any person). He shall indemnify and keep indemnified the J&K

Government against all claims for damages or injuries to any person or

any such property whatsoever, which may arise out of or in consequence

of the execution, and completion of the works and against all claims,

demands, proceedings, damages, costs, charges and expenses whatsoever

in respect of or in relation thereto.

50. ALTERATION ADDITION & OMISSION

50.1 The Developer shall have full powers, from time to time during execution

of the works to alter the contract drawings and make any additions or

omissions therein. These alteration, additions or omission shall invariably

be ordered in writing by the Engineer-in-charge. If the suggested

variations would, in the opinion of the Contractor if carried out, prevent

him from completing the works in time or involved any extra costs, he

shall accordingly notify the Engineer-in-charge in writing. The Developer

shall thereupon grant an extension of time commensurate with the extra

work involved and decision on any extra cost payable to the Contractor,

occasioned by such variations. The amount shall be determined in

accordance with the provisions of contract.

In the event of deletion or omission of the part of the work or reduction in

the scope of the contract the Engineer-in-charge shall accordingly notify

the Contractor in writing and no claims from the Contractor on account of

such omission or reduction in scope of the contract shall be entertained.


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51. TESTING AND COMMISSIONING

Samples

51.1 The Contractor shall if and when required by the Engineer-in-charge

prepare and submit samples of work and materials at his own expenses for

test and approval by the Engineer-in-charge.

Cost of testing

51.2 The cost of making such tests as are necessary and required for

ascertaining the quality of work in accordance with the specifications shall

be borne by Contractor.

52. CERTIFICATE OF FINAL COMPLETION

52.1 The Engineer-in-charge is not bound to pay the Contractor at any time

more than 75% of the estimated value of the work done by the Contractor

up to that time and the Contractor should fulfill the ceiling condition for

payment of Rs 15 Lacs or 10% of the contract value, whichever is more.

Unless otherwise provided or agreed to by the Engineer-in-charge,

payments shall be made ordinarily at monthly/bi-monthly or quarterly

intervals on the basis of interim certificates issued by the Engineer-in-

charge provided, however, that no such certificate shall be issued unless

the value of such certificate is equivalent to Rs 15 Lacs or 10% of the

contract value. While it is the intention of the Engineer-in-charge to limit

the period between such on account payments to a calendar month,

circumstances may sometimes preclude him from doing so and it is to be

understood and agreed by the Contractor that the delays in making such

payments do not nullify or vitiate in any way the other conditions of the

contract or raise claims thereof.

10% of each payments shall be retained by the Department/developer as

security deposit and released in accordance with provision of clause.

Certificate of final completion

52.2 The contract shall not be considered as complete until a certificate of final

completion as desired in clause 49 hereof, has been issued by the


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Engineer-in-charge. The certificate of final completion shall be given by

the Engineer-in-charge within six months after the work has been

completed as per contractual obligations.

53. NO INTEREST ON CONTRACTOR’S DUES

53.1 No claim for interest shall be entertained by the Engineer-in-charge with

respect to any money or balance which may be in his hands owing to any

disputes between him and the contractors or with respects to any delay on

the part of the Engineer-in-charge in making interim or final payment

otherwise.

Over Payments

53.2 In case of over payment in the running bills the contractor shall be bound

to repay the amount so paid whether demanded by the Engineer-in-charge

or not.

Payment for Extra Works

53.3 If any extra item or work is executed according to the instructions of the

Engineer-in-charge during the progress of work or is necessitated on

account of any alterations or additions specified vide clause 50 hereof the

payment for such work or items of works shall be governed by the terms

and condition of this contract and shall be made at the rates specified in

the contract. In case no such rates are specified in the contract, the rates

for such items will be based on actual analysis of rates of the particular

items of works subjects to the approval of the Developer/LREDA whose

decision will be final and binding on the parties.

54. ABANDONMENT OF WORK

Work abandoned or suspended by the contractor

54.1 If the contractor shall, due to any cause what so ever, abandon the works

or suspend the same for more than a month then the Engineer-in-charge

after giving seven days notice in writing to the contractor enter upon the

site of work and complete the work departmentally or through some other

agency, utilizing ( if necessary ) any material or machinery of the original

contractor which may be lying at the site.


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The Engineer shall with the approval of the Developer/LREDA upon

entering the site of work and before re-allotment of the balance work,

notify the contractor for attending the site of work for taking the

measurement of the work done by the contractor and for preparing any

inventory of material and plants lying at the site of work. If the contractor

fails to attend within seven days of the above notice , the Engineer shall

unilaterally supply to the contractor a certificate copy of the measurement

of the work done by the contractor along with the inventory of the

material and plants laying at the site of work. This certificate copy of the

measurement and inventory of the material plants thus framed shall not be

opened to any objection by the contractor and shall forms the basis of his

balance payment.

The Engineer-in-charge shall not be liable to pay the original contractor

any money on account of the contractor until the work is completed and

thereafter until the cost of completion and other expenses incurred by the

Developer have been ascertained and certifies by the Engineer-in-charge.

The original contractor shall be entitled to receive only such sum or sums

(if any) as the Engineer may certified to be due to him on account of the

part work done by him and his materials after deducting the extra incurred

by the department in getting the work completed departmentally or

otherwise. But if such amount shall exceed the sum which is due to the

contractor including his security deposits the contractor shall upon

demand, pay to the Developer amount as such or it may be recovered from

the contractor through other means to be decided by the Developer/Owner

Orders for Postponement/abandonment

54.2 The contractor shall not claim any sum other than the due to him for the

work already done by him if the work or part thereof if ordered by the

Developer/Owner to be postponed or abandoned in the overall interests of

the department for any other reasons.

The contractor shall within seven days of the issue of such order attend

the site of work for taking the measurements of works done by him and in


Page 39

the events of failure on the part of the contractor to do so the Engineer-in-

charge shall take unilaterally the measurements of the work done by the

contractor and supply a certified copy of the same to the contractor.

This certified copy of the measurement of the work done shall not be

open to objection and shall form the basis of the balance payment if due.

55. CONDITION REPEATATION/MISSING

55.1 In case of conditions repeated or meaning differ under different clauses or

it contradicts, the conditions which gives maximum safety and security to

the Developer shall be considered as final.

55.2 If description about any part of structure/work is found missing in the

general condition of the contract but it is essential for the testing and

commissioning of the structure is deemed to be included in the contract

agreement and the Contractor has to executive the same missing work to

complete the work/structure in all respect.


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SECTION- II SPECIAL CONDITIONS OF CONTRACT

1. GENERAL

1.1 The Special Conditions of contract supplements the General Conditions of

contract and shall be considered as part of the Tender Documents. Where

the provisions of these special conditions are at variance with general

conditions of contract, these conditions shall prevail. The work is to be

carried out in accordance with Indian Standard Codes of Practice and

should be read in conjunction with the specifications annexed to the

Tender. In case of any contradiction, the specifications annexed in the

tender shall prevail.

2. DRAWINGS AND SPECIFICATIONS

2.1 The construction drawings will be issued by the Developer/Owner.

2.2 If modification of the drawings on the basis of Contractor’s Design and

Engineering are to be done, Technical discussions shall be held between

the Contractor and the Developer to discuss the said modifications done.

If after discussion, it is established that the approved drawings require

some modification/alteration, the Developer/Owner shall get the

drawings revised and submit the same to the Contractor within 15 days

for the execution of work as per the final approved drawings.

One copy of all drawings and contract documents shall be kept at all

times at site by the contractor.


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3. DATA TO BE FURNISHED BY THE CONTRACTOR

3.1 The contractor shall submit the following to the Engineer-in-Charge –

i) Proposed construction program and time schedule in the form of PERT,

CPM and BAR CHARTS showing sequence of operations within 4 weeks of

notice to proceed with the work in pursuance to the conditions of contract.

Such progress of work shall be subject to review and revisions by the

Contractor in consultation with the Developer/Owner from time to time for

speedy completion of the Works within the time limit for completion.

The Engineer-in-Charge shall scrutinize the above and his decision shall be

final and binding on the contractor.

4. CONSTRUCTION PROGRAMME

4.1 Immediately within 07 calendar days after the date of submission of the

program of works by the contractor, the Engineer-in-Charge and contractor

will finalize the definite Construction Programme/Schedule covering the

order in which the work will be carried out, taking into account the

requirements for the work. This construction programme shall be in such

form and in such details as to properly show the sequence of operation and

the period of time required for completion of work under each operation.

4.2 The Contractor shall submit to the Engineer-in-Charge the monthly

progress report on the 5th

day of the following month.

4.3 The working programme shall be reviewed jointly by the Developer/Owner

and the Contractor at least at 3 months intervals. In case of hold ups/delays,

the progress of the works with reference to the agreed schedule shall be

given special attention and necessary modifications of the programme

within the overall time for completion shall be carried out by mutual

agreement between the Developer/ Owner and the Contractor.


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5 TIME-THE ESSENCE OF CONTRACT

5.1 Time is the essence of the contract and the various items of work shall be

completed as stipulated in the construction programme. The time will be

reckoned from the date as specified in the general conditions of contract

and shall include the final clean up of the site of work.

6 POWER TO VARY OR OMIT WORKS

6.1 No alterations amendments, suspensions or variations of the work (here in

after referred to as variations) under the contract as shown by the approved

contract drawings or specifications shall be made by the contractor except

as directed in writing by the Engineer-in-Charge , but the Engineer-in-

Charge shall have full power and subject to special conditions herein from

time to time during the execution of the contract by notice in writing to

instruct the contractor, to make such variations without prejudice to the

contract, and the contractor shall carry out such variations and be bound

by the same conditions as far as applicable as though the said variations

occurred in the specifications. If any suggested variation would be in the

opinion of the contractor, if carried out, prevent him from fulfilling his

obligations or guarantee under the contract, he shall notify the same to the

Engineer-in-Charge in writing and the Engineer-in-Charge shall decide

forthwith whether or not the same shall be carried out.

If the Engineer-in-Charge confirms his instruction, the contractor

obligations and guarantee shall be modified to such an extent as may be

justified. The difference in cost if any, occasioned by any variations shall

be added to the contract price as the case may require. The amount of such

prices if any shall be ascertained determined in accordance with the rates

specified in the schedule of prices so far the same might be applicable.

Where the rates are not contained in the schedule or are not applicable,

they shall be settled mutually by the Engineer-in-Charge and the

Contractor.


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7 HOUSING ACCOMMODATION AND WATER SUPPLY

7.1 The contractor shall make his own arrangements for housing of his staff

and labour and for supply of water for construction and domestic use. The

arrangements of housing, sanitation, latrines and water supply to labour

camp will comply to the local regulations. For constructing the colony,

land will be provided free of cost by the Developer/Owner to the

contractor.

8 SUFFICIENT MEANS AND ELECTRICAL ENERGY

8.1 The Contractor shall supply and take upon himself the entire responsibility

for the sufficiency of the machinery, tools, implements and generally all

the means used for the fulfillment of this contract whether or not of the

type enumerated and whether such means may or may not be approved or

recommended by the Engineer-in-Charge and the contractor must accept

all risks and accidents, or damages from whatever cause they may arise

except where otherwise provided in this contract, until the completion of

this contract.

8.2 The contractor will make his own arrangement to meet the electrical

energy requirement of the labour colony and for the workshop and

welding work and lighting in the project area. The Developer/owner will

facilitate the securing of electricity connection.

9 WORKING HOURS

9.1 The hours of work for labour employed by the contractor shall conform to

the hours of work and certain work will be regulated in accordance with

provisions of Minimum Wages Act 1948 or any other similar law inforce

as amended upto date.


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10 SETTING OUT WORKS

10.1 The contractor shall be responsible for the true and proper setting out of

the works in relation to permanent benchmarks and its coordinates given

by the Engineer in writing. If at any time during the progress of the works

any error appears or arises in position, levels, dimension or alignment of

any part of the works, the contractor shall rectify the same. The checking

of any setting out or of any line or level by the owner’s representative

shall not in any way relieve the contractor who shall carefully protect and

preserve all benchmarks, sight rails, pegs and other things used in setting

out the works.

11 CHANGES IN DESIGNS

11.1 The Developer/Owner reserve the right to make any changes in the design

and plans of the work pursuant to Clause 22.3.

12 MATERIALS BROUGHT ON SITE

12.1 All materials, tools and tackles brought to and delivered upon the site for

the purpose of the work by the contractor shall be deemed to be in the

possession of the Developer/Owner and is not to be removed or taken

away by the contractor without the express permission of the Engineer-in-

Charge, but the contractor shall nevertheless be solely liable and

responsible for any loss or destruction thereof or damage thereto.

12.2 All key materials shall be arranged as mentioned below:

i) Cement: Cement shall be of 43 grade (OPC) as per BSI-standards from

J&K Cement Ltd. Srinagar or ACC. The manufacturing date should not

be older than six (6) months and the cements should be consumed/used

for works within six(6) months. The contractors shall produce, standard

test certificates and other proofs. The contractor shall maintain testing

facilities at site of work.


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ii) Steel of sorts/rods for RCC works

iii) Steel Plates for Gates, trash rack etc, shall be arranged from SAIL with

proof of test certificates.

: The contractor shall arrange steel from

SAIL or TATA of the grade of Fe415 (deformed twisted steel) and as per

BSI-standards codes IS 1786. Mild steel will not be allowed for the

works.

13 CONTRACTOR’S REPRESENTATIVE AND WORKMEN

13.1 The contractor shall appoint at least one competent representative whose

name shall have been communicated in writing to the Engineer-in-Charge

for the construction work. Any written order or instruction given to this

representative of the contractor shall be deemed to have been given to the

contractor.

The Engineer-in-Charge shall be empowered to object to the employment

of any representative or person of the contractor who in the execution of

the works or otherwise misconduct’s or is incompetent or negligent and

the contractor shall remove the person so objected upon on receipt of

written notice from the Engineer-in-Charge, and the contractor shall

provide in his place a competent substitute.

The contractor shall not contravene the provisions of the Factory Act 1948

as amended from time to time.

14 CONTRACTOR’S LIABILITY FOR LOSS, DAMAGE, ACCIDENT ETC.

14.1 The contractor shall indemnify the Developer/Owner against all actions,

suits, claims, demands, cost or expenses arising in connection with injury

suffered, prior to the date when the work shall have been taken over, by

person employed by the contractor, or his sub- contractor on the works

whether under the general law or under the Workman Compensation Act


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1923 or any other Statute or law in force and shall also take steps to

properly insure against any claim there under.

14.2 The works whether fully completed or incomplete, all the machinery tools

and temporary buildings and other things connected therewith shall remain

at the risk and in the sole charge of the contractor until the completed

works have been delivered to the Engineer-in-Charge . Until delivery of

completed works the contractor shall take all precautions to keep those

work free from damage and in event of any damage, the contractor shall

set right such loss or damage at his own cost.

15 ISSUE OF MATERIAL

The Developer/ Owner does not take any responsibility for issuing any

material or equipment to the contractor or sub-contractor for the execution

of the works. However, if LREDA decides to issue any material to the

contractor, the rates of issue shall be specified by the Engineer-in-Charge,

which shall be construed as a part of the Contract pursuant to Clause 6 and

be final and binding on the contractor.

16 ECOLOGICAL BALANCE

16.1 The Contractor shall maintain ecological balance by preventing

deforestation, water pollution and defacing of natural landscape in the

vicinity of work areas, etc. In order to maintain the ecological balance, the

Contractor shall specifically observe the following instructions:

a) Where unnecessary destruction, scarring, damage or defacing may

occur as a result of the Contractor’s operation the same shall be

required, replanted or otherwise corrected at the Contractor’s

expense. The Contractor will prevent scattering of rocks or other

debris outside the work areas. All work areas shall be smoothened

and graded in a manner to confirm to the natural appearance of the

landscape as directed by the Engineer-in-Charge.


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b) All trees and shrubs which are not specifically required to be

cleared or removed for construction purposes, shall be preserved

and shall be protected from any damage that may be caused by the

Contractor’s construction operation and equipment. The removal

of trees or shrubs will be permitted only after prior approval by the

Engineer-in-Charge, Special care shall be exercised where trees or

shrubs are exposed to injuries by construction equipment, blasting,

excavating, dumping, chemical damage or other operation and the

Contractor shall adequately project such trees by use of protective

barriers or other methods approved by the Engineer-in-Charge .

Trees shall not be used for anchorage.

c) The Contractor’s construction activities shall be performed by

methods that will prevent entrance or accidental spillage of solid

matter contaminants, debris and other objectionable pollutants and

wastage into the river. Pollutants and Wastes shall be disposed off

in a manner and at sites approved by the Engineer-in-Charge.

d) In the Conduct of construction activities and operation of

equipment, the Contractor shall utilize such practicable methods

and devices as are reasonably available to control, prevent and

otherwise minimize air pollution.

Burning of materials resulting from clearing of tree bushes,

combustible construction materials and rubbish may be permitted

only when atmospheric conditions for burning are considered

favourable.

16.2 The failure of the Contractor to follow such ecological guidelines

contained herein, as well as other prescribed guidelines, either

existing or to be prescribed in future by the relevant authorities,

which gives rise to any claim for damages or any other liability


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shall be failure of the Contractor and shall be borne entirely by

him.

17 ACCESS TO THE CONTRACTOR’S BOOK:

17.1 Whenever it is considered necessary by the Engineer-in-Charge to ascertain

the actual execution of any particular extra item of work or supply of plant

or material on which advance is to be made for extra items or claims, he

shall direct the contractor to produce the relevant documents for any or all

data relevant to the item and necessary to determine its cost etc. and the

contractor shall, when so required furnish all information pertaining to the

aforesaid items in the mode and manner that may be specified by the

Engineer-in-Charge.

18 INSPECTION AND TESTS

18.1 The Engineer-in-Charge and his duly authorized agent shall have, at all

times the right to inspect the works which are in progress either on the site

or in the Contractor’s or in the sub-contractor’s premises where work in

connection with the contract may be in hand. Such inspection will not

absolve the contractor of his contractual obligation to execute the work in

accordance with the specification of the contract.

18.2 The Contractor shall furnish promptly without additional charge, all

facilities, labour and material necessary for the safe and commercial

inspection and test that may be required by the Engineer-in-Charge. All

inspection and tests by the Developer/Owner shall be performed in a

manner as to not unnecessarily delay the work. The contractor shall be

charged for the additional cost of inspection when material and

workmanship are not ready at the time of inspection.


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19 EXAMINATION AND TESTS ON COMPLETION

19.1 On the completion of the work and not later than the expiry of the

maintenance period the Engineer-in-Charge carry examination and tests

of works as may be seen by him to be possible necessary and desirable for

which the contractor shall furnish free of cost any materials facilities and

labour which may be necessary thereof.

20. REMOVAL OF TEMPORARY WORKS, PLANT AND SURPLUS

MATERIAL

20.1 Prior to acceptance of the completed work, excepting as otherwise

expressly directed as permitted in writing, the contractor shall, at his own

expense, remove from the site all the temporary structures, including

building, pole work, crib work all plant and surplus material rubbish and

debris for which the contractor is responsible to the satisfaction of the

Engineer-in-Charge .

21 LAWS AND REGULATION

21.1 All work shall be executed in accordance with the laws in force in India

and J&K relating to the works and rules and regulations there under and

any other statutory modification thereof whenever they are applicable. The

jurisdiction shall be of the court at Leh.

22 FENCING AND LIGHTING

22.1 The contractor shall be responsible for proper fencing, guarding and

lighting and for provision of temporary roadways, guards and fences

which may be rendered necessary by reason of the work for the

accommodation and protection of workers, passers or other traffic and of

the owners and occupiers of adjacent property.


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23. PATENT RIGHTS ETC.

23.1 The contractor shall fully indemnify, the Developer/Owner against all

actions, suits, claims, demand, cost, charges and expenses arising from or

incurred by reason of infringement or alleged infringement of any letters,

designs, patents, trademarks or name, copyrights or other protected rights

in respect of any machines, plant, work, materials, things, systems or

methods of using, fixing, working arrangement used or fixed or supplied

by the contractor, but this indemnity shall not extend or apply to any

action suit, claim, demand, cost, charges or expenses arising from or

incurred by reasons of works or any part thereof otherwise than in manner

or for purpose contemplated by the contract. All royalties and other similar

payments which may have to be repaid for the use of any such machine,

plant, work, materials, things, systems or methods, as aforesaid shall be

deemed to have been covered by the contract price payable to the

contractor.

But the contractor shall pay any royalties or other charges payable in

respect of any such use, the amount so paid being reimbursed to the

contractor only if the use was a result of any drawings and /or

specification issued after submission of the tender.

24. DEATH BANKRUPTCY BREACH OF CONTRACT

24.1 If the contractor dies or commits any act of bankruptcy or being, a

corporation commences to be wound up except for reconstitution purpose

or carries on its business under a receiver, the executors, successors, or

other representatives in law of the estate of the contractor or any such

receiver, liquidator or any other person in whom the contract may become

vested, shall forthwith give notice thereof in writing to the Engineer-in-

Charge and shall for one month during, which he shall take all reasonable

steps to prevent stoppage of work, have the option of carrying out the

contract subject to his or their providing such guarantee as may be


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required by the Engineer-in-Charge but not exceeding the value of the

work at the time remaining unexecuted. In the event of stoppage of the

work, the period of auction under this Clause shall be 14 days only

provided that, should the above auction not be exercised, the contract may

be terminated by the Managing Director, LREDA by giving notice in

writing to the contractor and the Engineer-in-Charge may exercise the

same power which he could exercise and will have the same rights, if the

work has been taken out of the contractors hand under that Clause.

25. RIGHT OF OTHER CONTRACTORS AND PERSONS

25.1 If during the progress of the work covered by the contract it is necessary

for other contractors or persons to do work in or about the site of the work,

the contractor shall afford such facilities as the Engineer-in-Charge may

require.

26. SUSPENSION OF WORK

26.1 (i) The Developer/Owner reserves the right to suspend and reinstate

execution of whole or any part of the works without invalidating the

provision of the contract. Order for suspension or reinstatement of

the works will be issued by the Engineer-in-Charge to the

Contractor in writing. The time for completion of the works will be

issued by the Engineer-in-Charge to the Contractor in writing. The

completion date of the works will be extended for a period equal to

the duration of suspension

(ii) Any necessary and demonstrable cost incurred by the Contractor as

a result of such suspension of the works will be paid by the

Developer/Owner, provided the costs worked out are to the

satisfaction of the Engineer-in-Charge. The Developer/Owner will

not be responsible for any liabilities of the suspension or delay on


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account of default on the part of the Contractor or his

subcontractor.

27. PAYMENT FOR CIVIL WORKS

27.1 The payment to the Contractor for the Civil Works will be made as

scheduled below:

i) 10% of the cost of the Work will be paid as mobilization advance

after acceptance of offer and signing of the contract agreement

against bank guarantee of an equal amount furnished on the

prescribed form. The 10% Mobilization advance will be deducted

from running Bills proportionately and the liability under the bank

guarantee shall stand discharged accordingly.

ii) Up to 90 % of the cost of the Work shall be paid as running

payments.

iv) 10% of the cost of Civil Works shall be retained from each running bill.

The total amount retained is repaid to the Contractor on the completion of

the works by the Contractor, when the Defects Liability Period of one

year /maintenance has passed and the Engineer-in-Charge has certified

that all Defects notified by him to the Contractor before the end of this

period have been corrected.

28 INCOME TAX / SALES TAX/VAT/SERVICE TAX

28.1 Deduction of Taxes shall be made at the prevailing rates during the

pendency of the Contract from each bill as per the rule of Income Tax

Authorities. Sales Tax as per prevalent rates on the gross amount of each

bill shall also be deducted from each bill.


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29 SAFETY CODE

29.1 Suitable scaffolds should be provided for workmen for all works that

cannot safely be done from the ground or from solid construction except

such short period work as can be done safety from ladders. When a ladder

is used an extra mazdoor shall be engaged for holding the ladder and if the

ladder is used for carrying materials as well, suitable footholds and hand-

hold shall be provided on the ladder and the ladder shall be given an

inclination not steeper than ¼ to 1 (1/4 horizontals and 1 vertical).

29.2 Scaffolding of staging more than 3.6 m (12 ft) above the ground or floor,

swing or suspended from an overhead support or erected with stationery

support and shall have a guard rail properly attached or bolted, braced and

otherwise secured at least 90 cm (3 ft) high above the floor or platform of

such scaffolding or staging and extending along the entire length of the

outside and ends thereof with only such opening, as may be necessary for

the delivery of materials. Such scaffolding or staging shall be so fastened

as to prevent it from swaying form the building or structure.

29.3 Working platforms gangways and stairways should be constructed that

they should not sag unduly or unequally, and if the height of the platform

or the gangway or the stairway is more than 3.6 m (12 ft) above ground

level or floor level, they should be closely boarded, should have adequate

width and should be suitably fastened as described in (29.2) above.

29.4 Every opening in the floor of a building or in a working platform shall be

provided with suitable fencing or railing whose minimum height shall be

90 cm (3 ft).

29.5 a). Safe means of access shall be provided to all working platforms and

other working places. Every ladder shall be securely fixed. No portable

single ladder shall be over 9 m (30 ft) in length while the width between

side rails in rung ladder shall in no case be less than 29 cm (11.5”) for


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ladder upto and including 3 m (10 ft) in length. For longer ladder this

width should be increased atleast ¼” for each additional 30 cm (1 foot) of

length. Uniform step spacing of not more than 30 cm. shall be kept.

Adequate precautions shall be taken to prevent danger from electrical

equipments. No material on any of the sites of work shall be so stacked or

placed as to cause danger or inconvenience to any person or the public.

The contractor shall provide all necessary fencing and lights to protect the

public from accident and shall be bound to bear the expenses of defiance

of every suit, action or other proceedings at law that may be brought by

any person for injury sustained owing to neglect of the above precautions

and to pay any damages and cost which may be awarded in any such suit,

action or proceedings to any such person or which may with consent of the

contractor be paid to compensate any claim by any such person.

b). All the temporary works including scaffolding etc shall be arranged by

the Contractor to execute the work, keeping in view safety of the labor and

all related structures as per the relevant Indian safety Manual/Codes e and

to the satisfaction of the Engineer-in-charge.

29.6 Excavation and Trenching

All trenches 1.2 m (4 ft) or more in depth shall at all times be supplied

with atleast one ladder for each 30 m (100 ft) in length or fraction thereof.

Ladder shall extend from bottom of the trench to atleast 90 cm (3 ft) above

the surface of the ground. The side of the trenches which are 1.5 metre (5

ft) or more in depth shall be stepped back to give suitable slope or securely

held by timber bracing, so as to avoid the danger of slides collapsing. The

excavated materials shall not be placed within 1.5 m (5 ft) of the edges of

the trench or half of the depth of the trench whichever is more. Cutting

shall be done from top to bottom. Under no circumstances undermining of

undercutting shall be done.


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29.7 Demolition

Before any demolition work is commenced and also during the progress of

the work:-

(i) All roads and open areas adjacent to the work site shall either be

closed or suitably protected.

(ii) No electric cable or apparatus which is liable to be source of

danger or a cable or apparatus used by the operator shall remain

electrically charged.

(iii) All practical steps shall be taken to prevent danger to persons

employed from sick of fire or explosion or flooring. No floor, roof

or other part of the building shall be so overloaded with debris or

materials as to render it unsafe.

29.8 All necessary personal safety equipment as considered adequate by the

Engineer-in-Charge should be kept available for the use of the person

employed on the site and maintained in a condition suitable for immediate

use and the contractor should take adequate steps to ensure proper use of

equipment by those concerned. The following safety equipment shall

invariably be provided.

(i) Workers employed on mixing asphaltic materials, cement and lime

mortars shall be provided with protective footwear and protective

goggles.

(ii) Those engaged in white washing and mixing or stacking of cement

bags or any material which is injurious to the eyes shall be

provided with protective goggles.

(iii) Those engaged in welding works shall be provided with welder’s

protective eye shields.


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(iv) Stone breakers shall be provided with protective goggles and

protective clothing and seated at sufficiently safe intervals.

(v) The Contractor shall not employ men and women below the age of

18 years on the work of painting with products containing lead in

any form. Whatever men above the age of 18 years are employed

on the work of lead painting, the following precautions should be

taken:-

(a) No paint containing lead or lead products shall be used except

in the form of paste or readymade paint.

(b) Suitable face masks should be supplied for use by the workers

when paint is applied in the form of spray or a surface having

lead paint is dry rubbed and scraped.

(c) Overalls shall be supplied by the Contractors to the workmen

and adequate facilities shall be provided to enable the working

painters to wash during and on the cessation of work.

29.9 The Contractor shall not employ women and men below age of

18 years on the work of painting with product containing lead in

any form. Wherever men above the age of 18 are employed on the

work of lead painting, the following principles must be observed

for such use.

(i) White lead, sulphate of lead or product containing these pigment,

shall not be used in painting operation except in the form of pastes

or paint ready for use.

(ii) Measures shall be taken, wherever required in order to prevent

danger arising from the application of a paint in the form of spray.


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(iii) Measures shall be taken, wherever practicable, to prevent danger

arising out of dust caused by dry rubbing down and scrapping.

(iv) Adequate facilities shall be provided to enable working painters to

wash during and on cessation of work.

(v) Overall shall be worn by working painters during the whole

working period.

(vi) Suitable arrangements shall be made to prevent clothing put off

during working hours being spoiled by painting materials.

29.10 When the work is done near any place where there is risk of drowning, all

necessary equipment should be provided and kept ready for use and all

necessary steps taken for prompt rescue of any person in danger and

adequate provisions should be made for prompt first aid and treatment of

all injuries likely to be sustained during the course of the work.

29.11 Use of hoisting machines and tackle including their attachments,

anchorages and supports shall conform to the following standards or

conditions:

(a) These shall be of good mechanical construction, sound materials,

adequate strength and free from patent defects and shall be kept in

good working order.

(b) Every rope used in hosting or lowering materials or as means of

suspension shall be of durable quality and adequate strength, and

free from patent defects.


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(ii) Every hoisting appliance operator, shall be properly qualified and

noperson under the age of 21 years should be in charge of any

hoisting machine or give signals to operator.

(iii) In case of every hoisting machine and of every chain rig hook,

shackle swivel and pulley block used in hoisting or as means of

suspension, the safe working load shall be ascertained by adequate

means. Every hoisting machine and all gears referred above shall

be plainly marked with the safe working load. In case of hoisting

machine having a variable safe working load, each safe working

load and the condition under which it is applicable shall be clearly

indicated. No part of any machine or any gear referred above in

this paragraph shall be loaded beyond the safe working load except

for the purpose of testing.

(iv) In case of departmental machines, the safe working load shall be

notified by the Electrical Engineer-in-Charge. As regards

contractor’s machines, the contractors shall notify the safe working

load of the machine to the Engineer-in-Charge whenever he brings

any machinery to site of work and get it verified by the Electrical

Engineer-in-Charge concerned.

29.12 Motors ,gearing, transmission, electric wring and other dangerous

parts of hoisting appliances should be provided with efficient

safeguards. Hoisting appliances should be provided with such

means as will reduce to the minimum, the risk of accidental

descent of the load. Adequate precautions should be taken to

reduce to the minimum the risk of any part of a suspended load

becoming accidentally displaced. When workers are employed on

electrical installations, which are already energised, insulating

mats, wearing apparel, such as gloves, sleeves and boots as may be

necessary should be provided. The worker should not wear any


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rings, watches and carry keys or other materials which are good

conductors of electricity.

29.13 All scaffolds, ladders and other safety devices mentioned or

described herein shall be maintained in safe condition and no

scaffold, ladder or equipment shall be altered or removed while it

is in use. Adequate washing facilities should be provided at or rear

places of work.

29.14 These safety provisions should be brought to the notice of all

concerned by display on a notice board at a permanent place at

work spot. The person responsible for compliance of the safety

code shall be named therein by the contractor.

29.15 To ensure effective enforcement of the rules and regulations

relating to safety precautions, the arrangement made by the

contractor shall be open to inspection by the Labour Officer or

Engineer-in-Charge or their representatives.

29.16 Notwithstanding the above charges from (28.1) to (28.15) there is

nothing in these to exempt the contractor from the operations of

any other Act or Rule in force in the Republic of India.

30 MODEL RULES FOR THE PROTECTION OF HEALTH AND

SANITARY ARRANGEMENT FOR WORKERS.

30.1 First-Aid Facilities

(i) At every work place there shall be provided and maintained, so as

to be easily accessible during working hours, first-aid boxes at the

rate of not less than one box for 150 contract labour or part thereof

ordinarily employed.


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(ii) The first-aid box shall be distinctly marked with a red cross on

white background and shall contain the following equipment:

(a) For work places to which the number of contract labour

employed does not exceed 50.

Each first-aid box shall contain the following equipments:-

1. 6 small sterilized dressings.

2. 3 medium size sterilized dressings.

3. 3 large size sterilized dressings.

4. 3 large size sterilized burn dressings.

5. 1 (30 ml.) bottle containing a two percent alcoholic

solution of iodine.

6. 1 (30 ml.) bottle containing salvolatile having the doses

and mode of administration indicated of the label.

7. 1 snakebite lancet.

8. 1 roll of adhesive plaster.

9. 1 (30 grams) bottle potassium permanganate crystals.

10. 1 pair scissors.

11. 1 copy of the first-aid leaflet issued by the Director

General. Factory Advice Service and Labour Institutes,

Government of India.

12. 1 bottle containing 100 tablets (each of 5 grams) of

aspirin.

13. Ointment for burns.

14. A bottle of suitable surgical antiseptic solution.

(b) For work places in which the number of contract labour

exceed 50.

Each first-aid box shall contain the following equipment.


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1. 12 small sterilized dressings.

2. 6 medium size sterilized dressings.

3. 6 large size sterilized dressings.

4. 6 large size sterilized burn dressings.

5. 6 (15 gms) packets sterlised cotton wool.

6. 1 (60 ml) bottle containing a two percent alcoholic

solution Iodine.

7. 1 (60 ml) bottle containing salvolatile having the

dose and mode of administration indicated on the

label.

8. 1 roll of adhesive plaster.

9. 1 snake bite lance.

10. 1 (30 ml) bottle of potassium permanganate crystals.

11. 1 pair scissors.

12. 1 copy of the first-aid leaflet issued by the Director

General. Factory Advice Service and Labour

Institutes, Government of India.

13. A bottle containing 100 tablets (each of 5 gms) of

aspirin.

14. Ointment for burns.

15. A bottle of suitable surgical antiseptic solution.

(iii) Adequate arrangement shall be made for immediate requirement of

the equipment when necessary.

(iv) Nothing except the prescribed contents shall be kept in the first aid

box.

(v) The first–aid box shall be kept in the charge of a responsible

person who shall always be readily available during the working

hours of the work place.


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(vi) A person in charge of the First- aid box shall be person trained in

first-aid treatment in the work place where the number of contract

labour employed is 150 or more.

(vii) In work places where the number of contract labour employed is

500 or more and hospital facilities are not available with easy

distance from the works, first-aid posts shall be established and run

by a trained compounder. The compounder shall be on duty and

shall be available at all hours when the workers are at work.

(viii) A suitable motor transport shall be kept readily available to carry

injured person or person suddenly fallen ill to the nearest hospital.

30.2 Drinking Water

(i) In every work place there shall be provided and maintained at

suitable places, easily accessible to labour a sufficient supply of

cold water fit for drinking.

(ii) Where drinking water is obtained from an intermittent public water

supply, each work place shall be provided with storage where such

drinking water shall be stored.

(iii) Every water supply or storage shall be at a distance of not less than

50 feet from any latrine drain or other source of pollution. Where

water has to be drawn from an existing well which is within such

proximity of latrine, drain or any other source of pollution, the well

shall be properly chlorinated before water is drawn from it for

drinking. All such wells shall be entirely closed in and be provided

with a trap door which shall be dust and waterproof.


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(iv) A reliable pump shall be fitted to each covered well, the trap door

shall be kept locked and opened only for cleaning or inspection

which shall be done atleast once a month.

30.3 Washing Facilities

(i) In every work place adequate and suitable facilities for washing

shall be provided and maintained for the use of contract labour

employed therein.

(ii) Separate and adequate cleaning facilities shall be provided for the

use of male and female workers.

(iii) Such facilities shall be conveniently accessible and shall be kept in

clean and hygienic condition.

30.4 Latrines and Urinals

(i) Latrines shall be provided in every work place on the following

scale namely.

(a) Where female are employed there shall be atleast one

latrine for every 25 females.

(b) Where males are employed, there shall be atleast one

latrine for every 25 males.

Provided that where the number of male or females exceeds 100 it

shall be sufficient if there is one latrine for 25 males or females, as

the case may be upto the first 100 and one for every 50 thereafter.

(ii) Every latrine shall be under cover and so partitioned off as to

secure privacy, and shall have a proper door and fastenings.


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(iii) Construction of latrines. The inside walls shall be constructed of

masonry or some suitable heat-resisting non-absorbent material

and shall be cement washed inside and outside atleast once a year.

Latrines shall not be of a standard lower than borehole system.

(iv) (a) Where workers of both sex are employed, there shall be

displayed outside each block of latrine and urinal, a notice in

the language understood by the majority of the workers “For

Men Only” or “For Women Only” as the case may be.

(b) The notice shall also bear the figure of a man or of a woman,

as the case may be.

(v) There shall be atleast one urinal for male workers upto 50 and one

for female workers upto 50 employed at a time, provided that

where the number of male or female workmen, as the case may be

exceeds 500, it shall be sufficient if there is one urinal for every

50 males or female upto the first 500 and one for every 100 or

part thereafter.

(vi) (a) The latrines and urinals shall be adequately lighted and shall be

maintained in a clean and sanitary condition at all times.

(b) Latrines and urinals other than those connected with a flash

sewage system shall comply with the requirements of the

Public Health Authorities.

(vii) Water shall be provided by means of tap or otherwise so as to be

conveniently accessible in or near the latrines and urinals.

(viii) Disposal of Excreta – Unless otherwise arranged for by the local

sanitary authority arrangements for proper disposal of excreta by

incineration at the work place shall be made by means of a suitable

incinerator. Alternately excreta may be disposed of by putting a


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layer of waste or refuse and then covering it with a layer of earth for

a fortnight (when it will turn to manure).

(ix) The contractor shall at his own expense carry out all instructions

issued to him by the Engineer-in-Charge to effect proper disposal of

night soil and other conservancy work in respect of the contractor’s

workmen or employees on the site. The contractor shall be

responsible for payment of any charges that may be levied by

Municipal or Competent Authority for execution of each on his

behalf.

30.5 Provision of Shelter During Rest

At every place there shall be provided, free of cost, four suitable sheds,

two for meals and the other two for rest separately for the use of men and

women labour. The height of each shall not be less than 3 metres from the

floor level to the lowest part of the roof. These shall be kept clean and the

space provided shall be on the basis of 0.6 sq.m. per head.

Provided that the Engineer-in-Charge may permit subject to his

satisfaction, a portion of the building under construction or other

alternative accommodation to be used for the purpose.

30.6 Creches

(i) At every work place at which 20 or more women workers are

ordinarily employed, there shall be provided two rooms of

reasonable dimensions for the use of their children under the age of

six years. One room shall be used as a play room for the children

and the other as their bedroom.

(ii) The rooms shall be provided with suitable and sufficient openings

for light and ventilation. There shall be adequate provision of

sweepers to keep the places clean.


Page 66

(iii) The contractor shall supply adequate number of toys and games in

the play room and sufficient number of cots and bedding in the bed

room.

(iv) The contractor shall provide one ayaa to look after the children in

the crèche when the number of women workers does not exceed 50

and two when the number of women workers exceed 50.

(v) The use of the rooms earmarked as Creches shall be restricted to

children, their attendants and mother of the children.

30.7 Anti-Malarial Precautions

The contractors shall at the own expense conform to all anti-malarial

instructions given to him by the Engineer-in-Charge including the filling

up of any borrow pits which may have been dug by him.

30.8 The above rules shall be incorporated in the contracts and shall form an

integral part of the contract.

30.9 Amendments

The Developer/Owner may, from time to time add to or amend these rules

and issue directions it may consider necessary for the purpose of removing

any difficulty which may arise in the administration thereof.

LREDA TECHNICAL SPECIFICATION OF CIVIL WORKS Vol VII

Page 1

VOLUME VII TECHNICAL SPECIFICATIONS OF

CIVIL WORKS


Page 2

TECHNICAL SPECIFICATIONS 1 GENERAL

1.1 These technical specifications are for the works included in the project. The

bills of quantities are given in the Tender Documents. Works include all

labour, material including departmental issues and bought out materials, tools

and plants as are required for the successful completion of the works. The

specifications have been tailored for the best quality works. The specification

have been framed in accordance with the requirements of the corresponding IS

standards, where available. In case specifications of any work are not given

either in Jammu & Kashmir PWD detailed specification or the specifications

given in the document, the work shall be carried out in all respects in

accordance with I.S codes or instructions of Engineer-in-charge given from

time to time. If there be any variations between these specifications and the

relevant IS standards, the work shall be done in accordance with IS

specifications.

2 EARTH WORK IN EXCAVATION

2.1 General

The work under these items shall comprise excavation according to the

foundation profiles (bottom) of the foundation raft or foundation or other

various works as per the drawings disposal of the excavation material at

locations specified by the Engineer-In-Charge employed by the

Developer/Owner, dressing and ramming for preparing the foundation for

placement of concrete and/or any other foundation material.

2.2 Layout of Works

After the site has been cleared of the jungle the contractor shall before starting

excavation, set properly all lines and establish levels for various works on the

basis of the benchmarks/reference pillars established. These shall be checked

by the Engineer-In-Charge and thereafter properly recorded duly signed by the

contractor and Engineer-In-Charge or his authorized representative.


Page 3

2.3 Excavation for Foundations

Excavation shall conform to the lines, grades, side slopes and levels shown on

the drawings or as directed by the Engineer-In-Charge. The contractor shall

not excavate outside the slopes or below the established grade or loosen any

material outside the limits of excavation. Subject to the permitted tolerances,

any excess depth excavated below the specified levels shall have to be filled

up with Cement Concrete by the Contractor, with the mix as specified by the

Engineer-In-Charge at his own cost including the cost of materials. If,

however, the Contractor is directed by the Engineer-In-Charge to excavate to a

lower level then indicated on the drawings, such additional excavation shall be

paid for at the applicable unit rates.

Falling of trees if needed, would only be done after obtaining written approval

form for Engineer-In-Charge, failing which the Contractor will be required to

pay compensation to the extent ascertained by the Engineer-In-Charge. The

trees will be the property of the Owner and shall not be removed from the site

without the written order from Engineer-in-Charge

The contractor shall remove any side slopes that may fall and obstruct the

work at his own cost. The contractor shall also safeguard the excavated earth

from the flow of water or slush from outside. No payment shall be made for

the removal of the slush if it comes.

The excavated material shall be placed beyond 1.5 m or half the depth of the

pit, whichever is more from the edge of the pit. It shall be placed farther away

if directed by the Engineer-in-charge. The contractor shall arrange to transport

the surplus excavated soil etc. to maximum distance of 1000m away if so

directed by the Engineer-in-charge.

The contractor shall be responsible for the assumption and conclusions

regarding the nature of the materials to be excavated and the difficulty in

maintaining the required excavations and performing the work required as

shown on the drawings in the accordance with these specifications. In the

matter of classification of the excavated soils/ materials the decision of the

Engineer –in-charge shall be final and binding on the contractor and where


Page 4

excavation requires bracing, sheeting or shoring etc. the contractor shall

submit the Engineer-in-charge, drawings showing details of the proposed

installations and shall not proceed with the work until he has received the

approval of the Engineer-in-charge.

2.4 Limits of Excavation

The contractor shall be required to do excavation up to the foundation level

leaving suitable berms and side slopes in all types of strata i.e. ordinary soil,

soil mixed with moorum, shingle etc. or with boulders, requiring blasting or

otherwise or any mixture of them and jungle clearance, falling tress, removal

of trees stumps and roots of all sizes and their disposal within specified leads

and lifts as directed by Engineer-in-charge.

2.5 Dewatering

Wherever water is met within excavation due to stream flow, seepage, springs,

rain or other reasons to the contractor shall take necessary measures to keep

the foundation trenches dry when so required and to protect structures built

against damage by erosion or sudden rise of water level. The methods to be

adopted in this regard and other details thereof shall be submitted by the

Contractor, for approval by the Engineer-In-Charge. Approval of the

Engineer-In-Charge shall, however, not relieve the contractor of the

responsibility for the adequacy of dewatering arrangements and to achieve

quality and safety of the works.

2.6 Excavation in Foundation in all Type of Soil

The specification for excavation in para 2.3 above shall apply to excavation in

rocks also, except for the bottom of excavation, where, depending on the type

of rock, over breaks up to a maximum depth of 0.3 m below the required level

may be allowed by the Engineer-In-Charge at his discretion. The extra

excavation below the final level shall be filed with suitable material as

directed by the Engineer-In-Charge.

2.6.1 Blasting


Page 5

All rules under explosive act or other local rules in force shall be fully

observed and all blasting work shall be done in accordance with the

stipulations contained in IS: 4081 (latest edition). Proper precautions for safety

of persons and property shall be taken. Where blasting is to be carried out in

the proximity of other structures, sand bags etc. , shall be used on top of the

blast holes to prevent the rock fragments from causing damage to adjacent

structures and other properties otherwise the sole responsibility of damages, if

any, shall be on the part of contractor. Blasting shall only be carried out by

qualified and licensed personnel under strict supervision at certain specified

times only, directed by the Engineer-In-Charge.

The number of blasts to be fired and the actual number of shots heard shall be

compared and the person responsible for blasting shall satisfy himself by

examination that all blasts have exploded before any person working in the

area is permitted to approach the work site. The withdraw of unexploded

charges shall not be permitted under any circumstances. The tampering and

the unexploded charges shall be flooded with water and holes marked in a

distinguishable manner. Another hole shall be drilled at a distance of about

450 mm of the old hole and fired in the usual way. This process shall be

continued till the original blast is exploded. Wherever, necessary, controlled

blasting shall be done as per standard practice or as per the directions of the

Engineer-In-Charge.

2.6.2 Decomposed or Soft Rocks

Excavation in decomposed or soft rocks shall be carried out by blasting or by

crowbars, pick – axes etc., or by both.

2.6.3 Chiseling in Hard Rock

Wherever blasting is prohibited or not practicable, excavation shall be carried

out by chiseling. The decision of the Engineer-In-Charge shall be final in this

regard.

All the excavated material obtained from excavation shall, remain the property

of the Owner. The useable excavated materials shall be separated and stored in

regular stacks at locations indicated by the Engineer-In-Charge. Useable


Page 6

material out of this excavation shall be allowed to be used for the works free

of charge.

2.7 Disposal

The disposal shall be done as directed by the Engineer-In-Charge within the

specified lead.

2.8 Measurements and Payments

The excavation shall be measured by taking cross – sections at suitable

intervals in the original position before commencement and after completion

of the work. The Contractor or his authorized representative shall be present

while the original, intermediate and final cross sections are recorded by the

representative of Engineer-in-Charge. Atleast three days notice shall be given

to the contractor for this. If the contractor or his authorized representative fails

to be present, the cross – sections recorded by the representative of the

Engineer-in-Charge shall be final and binding on the contractor. Where it is

not feasible to compute the volume by this method, the volume shall be

computed by other accepted methods as approved by the Engineer-in-Charge.

If required by the Engineer-in-Charge, the contractor shall leave the depth

indicators (Motam) during the excavation of such shape and size and such

positions as directed, so as to indicate the original ground level as accurately

as possible. The Contractor shall ensure that these remain intact till the final

measurements are taken.

For rock excavation where cross section measurements cannot be taken due to

irregular configurations or where the rock is admixed with other classes of

material, the volume shall be computed on the basis of stacks of excavated

rubble after making 40 percent deduction there from on account of swelling

factor. For Excavation for structure shall be measured in cubic meters limited

to the dimensions shown on the drawings or as directed by Engineer-In-

Charge. Excavation over increased width, cutting of slopes, shorting,

shuttering and planking shall be deemed as convenience for the Contractor in

executing the work and shall not be measured and paid for separately.


Page 7

The excavation, for final payment shall be measured only when the work is

completed in all respect and to the full satisfaction of Engineer-in-charge.

However, the excavation in excess of the line and degrades in drawings issued

to the contractor shall be measured by plotting the cross-section but shall be

deleted for the purpose of payment.

If natural slips occur (not due to the negligence of the contractor) beyond the

specified slopes the same will be measured and shall be paid to the contractor

at 2/3 of the agreement price. The decision of Engineer–in – Charge, whether

the slips are natural or due to negligence of the contractor, shall be final and

binding on the contractor. However, the Developer/Owner does not take any

responsibility for suspension or dislocation of work, damage to materials,

machinery and work, or any other loss due to aforesaid steps and no claims,

whatsoever, will be entertained on this account.

2.9 Rates

The unit rates for the aforesaid work shall include the following operations

(i) Setting out profiles

(ii) Stripping and removal of boulders and other unsuitable materials, if

any

(iii) Excavation in all types of material

(iv) Transporting the excavated material and depositing the same on sites

or at locations as indicated by Engineer-in-Charge.

(v) Trimming bottoms and slopes of excavation

(vi) Dewatering and keeping the area dry during construction.

The contract rate is for the complete work only. It shall be firm and hold good

for the work covered by the contract irrespective of the period within which

the work is completed. Suitable reduction in the rate shall be made if the work

is left incomplete or if easier portion are carried out and difficult portions are

left over. The decision of the Engineer-in-Charge in this regard shall be final

and binding to the contractor. No claim on this account shall be admissible.


Page 8

2.10 PAYMENT

The proposed foundation level of work maybe altered due to any reason

whatsoever and no extra payment shall, however be made on this account

unless specifically provided in the agreement.

The excavation for final payment shall be measured only when the work is

completed in all respect and to the full satisfaction of the Engineer-in-charge.

3 BACK FILLING

3.1 General

The work to be done under these specifications consists of furnishing all

materials, T&P and labour required for complete performance of work in

accordance with the drawings or as directed by the Engineer-in-Charge.

3.2 Compacted Backfill

The backfill shall be placed where indicated in the drawings or as indicated by

the Engineer-in-Charge. To the extent available, selected surplus soil from the

excavated material shall be used for backfill. If any material is required to be

obtained from borrow pits, the contractor shall make arrangements for

bringing such material from the borrow pits duly – approved by the Engineer-

in-Charge. The fill material shall be free from clods, shale, bushes, roots or

other perishable and objectionable materials.

Prior to back filling, all forms, temporary shorting timber etc. shall be

removed and the excavation cleaned of all trash, debris and perishable

material. Back filling shall begin only with the approval of the Engineer-in-

Charge

Backfill shall not be dropped directly upon or against any structure or facility,

where there is danger of displacement or damage. Trucks or heavy equipment

for depositing or compacting backfill shall not be used within 1.5 m of

building walls or other facilities, which may be damaged by their weight or

operation. Pushing of earth for back filling shall also not be adopted under any

circumstances.


Page 9

The backfill shall be placed in horizontal layers not exceeding 20 cm in

thickness. Each layer shall be compacted with proper moisture content and

with such equipment as may be required to obtain a density of not less than

95% of the laboratory maximum dry density as determined by the relevant

Indian Standard (latest edition). The method of compaction shall be subjected

to the approval of the Engineer-in-Charge.

Backfill adjacent to pipes shall be hand placed and compacted uniformly on

both sides of the pipes and where practicable, to a depth of 300 mm over the

top of pipes. Filling and tamping of pipe trenches shall be carried out

simultaneously on both sides of the pipes to avoid unequal pressures.

The moisture content of the compacted backfill at the time of compaction shall

be that as required to give the maximum consolidation of the material. When

directed by the sprinkling in advance of the compaction of each layer, the

amount of sprinkling shall be controlled so that no free water will appear on

the surface during or subsequent compaction. Where the material is too wet to

permit proper compaction the contractor shall leave it to dry until in the

opinion of the Engineer-In-Charge the optimum moisture content is reached.

The backfill section should be suitable protected from erosion.

3.3 Measurements

Measurements for payment for compacted backfill will be made in cubic

meters of materials placed between the structure lines and the excavation pay

line indicated on the drawings. Cross-sections shall be taken at suitable

intervals, if considered necessary, by the Engineer-in-Charge prior to the

commencement of back filling. Finally furnished profile or backfill shall be

plotted on the aforesaid cross sections and this will form the basis of all

measurements for payment. Due to conditions at site or for any other reasons,

the Engineer-In-Charge-In-Charge may according to his discretion adopt any

other mode of measurements and the same shall be acceptable to the

contractor. The excavated material used directly in backfill shall be measured

and paid for as excavation only.


Page 10

3.4 Payments

Payments for compacted backfill will be at the applicable contract unit price

which include cost of all inputs including plant machinery, labour and material

and performing all work including loading, unloading, handling, spreading,

sprinkling of water, compacting, dressing of slopes and other incidentals

required for the completion of work in accordance with the details shown on

the drawings and as directed by the Engineer-in-Charge

4. PLAIN AND REINFORCED CEMENT CONCRETE

4.1 General

These specifications cover the requirements of cement concrete in various

components of the project. It includes furnishing with cost of all labour,

materials and equipment in accordance with the provisions of the conditions of

the contract and performing all works for the manufacturing, transporting,

placing, finishing and curing of concrete in the structures included in the

contract. The cost of supplying/producing aggregates shall be included in the

contract. The cost of supplying/producing aggregates shall be included in the

unit rates tendered in the schedule of basis for the items of work in which

aggregate are used. Unit rate shall include all expenses i.e. screening, washing,

classifying, blending, storing, handling, hauling and other necessary

operations involved. The contractor shall not be entitled to any compensation

for materials wasted or materials discarded/rejected by reasons of not being in

accordance with the specifications.

4.2 Composition

Concrete shall be composed of ordinary Portland cement, water, fine and

coarse aggregates and any admixtures, if specified. The proportioning of

cement and aggregates in any type of concrete will be by weight/volume. The

design of each concrete mix will be based on the water-cement ratio necessary

to secure a plastic workable mix suitable for the specific conditions of

placement and when properly curd, a product having durability,

impermeability, and strength in accordance with all requirements of the

structure covered by these specifications. The cement concrete placed on the


Page 11

work shall have strength not less than that specified in IS: 456-2000 for the

grades of concrete use in works, with 10% tolerance. The water cement ratio

will be communicating in writing by the Engineer-in-Charge to the contractor

before the work is taken up and also whenever a change is desired.

4.3 Materials

4.3.1 Cement

Ordinary Portland Cement conforming to IS: 269 (latest edition) shall be

used.

4.3.2 Coarse Aggregates

The term “Coarse Aggregate” is to designate aggregate that is reasonably well

graded from 4.75 mm to 80 mm or any size of range of size specified herein.

Coarse aggregate for concrete shall be furnished by the contractor and shall

consist of crushed rock or natural gravel or a mixture of crushed rock and of

natural graved blended uniformly and to the satisfaction of the Engineer-In-

Charge.

The Contractor should investigate the quantity of coarse aggregate required by

him for the works well in advance. The contractor shell set up at his own cost

the processing and crushing and crushing plant for producing aggregates of the

required size and shell make necessary arrangements for its transportation to

the batching plant or screening site to the full satisfaction of Engineer-In-

Charge.

The sources from which coarse aggregates are to be obtained, shall be selected

by the Contractor well in advance of the time they are required to be used and

shall supply samples to the Engineer-In-Charge least 60 (sixty) days before the

date of contemplated use of the aggregate in concrete.

Coarse aggregates shall consist of uncoated hard, strong, dense and durable

pieces of crushed stone or natural single and shall be free from undesirable

matters viz. disintegrated stones, soft, flaky or elongated pieces, substances.

The total percentage of all undesirable constituents (except mica) in any size


Page 12

of coarse aggregate shall not exceed limits as specified in the relevant IS:

codes but in no case shall exceed 5% by weight both for crushed and

uncrushed aggregates. Relaxation of these limits could, however, be allowed

at the discretion of Engineer-In-Charge.

The coarse aggregates may be rejected if does not comply with the

requirements of IS: 383 (latest edition).

Contractor shall carried out washing of aggregate by approved means, if

desired by the Engineer-In-Charge at no extra cost. Grinding of coarse

aggregate for a particular size shall generally conform to latest relevant IS

codes and shall be such as to produce a dense concrete of the specified

proportions/or strength and consistency that will work readily into position

without segregation.

4.3.3 Fine Aggregates

The term “Fine Aggregate” is used to designate the aggregate defined as sand

in this chapter. It is expected that suitable river sand will be available in the

river/stream. The contractor shall be responsible for the investigation and

procurement of sand of the quality specified herein. Depending upon the

availability and suitability, it may be necessary to supplement the river sand

with manufactured sand from quarried rock. Manufactured sand may have to

be used entirely, or blended with river sand to obtain a satisfactory grading o

the fine aggregate.

In the case of river sand, the source from which it is obtained shall be

subjected to the approval of the Engineer-In-Charge.

All fine aggregate obtained from the river bed shall be washed to remove

impurities, silt and clay. Aggregates manufactured from natural rocks shall be

free from dust by either washing or any other approved process to the

satisfaction of the Engineer-in-Charge The fine aggregates shall be clean, free

from excess mica, silt particles, organic and chemical impurities.


Page 13

The sand shall consist of hard, dense, durable, uncoated rock fragments. The

maximum percentage of deleterious substances in the sand as delivered to the

mixer shall not exceed the values specified in IS: 383-1970 or as modified in

subsequent amendments.

The fine aggregates as delivered to the mixers or as incorporated in the mixed

concrete shall be well graded within such limits as may be specified by the

Engineer-In-Charge. During normal operation, the grading of the fine

aggregates shall be controlled so that the Fineness Modulus of nine samples

out of ten as delivered to the mixer shall be within the range of 2.0 to 3.6 or as

modified by the Engineer-in-Charge. In exceptional cases, the fine aggregates

of Fineness Modules less than 2.0 may permitted by the Engineer-In-Charge-

provided that extra cement consumption on the account shall be at

Contractor’s cost. The recovery of cost of cement for such extra consumption

will be made to the Developer/Owner at issue rates by the Contractor.

4.2 Water

Water used for mixing and curing shall conform to IS: 456-2000 or its

subsequent revisions. It shall be clean and free from injurious amounts of oils,

acids, alkalies, salts, sugar, organic materials or other substances that maybe

deleterious to concrete or steel. Potable water is generally; considered

satisfactory for mixing concrete. IS: 3025 & 3550 may be followed for testing

of water.

The silt content in water shall not exceed 1000 parts per million (ppm) by

weight. The contractor shall make his own arrangements for pumping water

required for washing aggregates, mixing in concrete, curing etc. and shall

provide pumps, pipelines etc., including their maintenance and operation at his

own cost.

4.5 Admixtures

The use of admixtures in concrete for increasing workability, improving

strength, entraining air or for any other purpose if required, will be furnished


Page 14

to the contractor free of cost at the project stores. The contractor shall make

necessary arrangements for carriage, storing, adding and mixing of these as

per instructions of the Engineer-in-Charge for which no additional payments

shall be made to him. The admixtures shall confirm to IS: 9103-1379, (latest

edition).

5. STORAGE OF MATERIALS

All materials shall be stored by the Contractor in a manner affording

convenient access for identification and inspection at all times. The storage

arrangements shall be subject to approval of Engineer-in-Charge Storage of

material shall be in accordance of IS: 4082.

All materials shall be stored as to prevent deterioration of intrusion of foreign

matter and to ensure the preservations of their quality and fitness for the work.

Any material, which has deteriorated or has been damaged or is otherwise

considered defective by the Engineer-in-Charge, shall be removed from the

site immediately.

5.1 Cement

Cement shall be stored above the ground in dry leak-proof well ventilated

warehouse, at the works in such a manner as to prevent deterioration due to

moisture or intrusion of foreign matter.

The storage platform shall be at least 300 mm above the ground.

Cement shall be stored in easily countable stack with consignment

identification marks. Stacking should not be done more then Ten bags in

height. Sufficient space for storage with open passage between stacks shall be

arranged. Consignments shall be used in order of their receipts at site or as

otherwise directed by the Engineer-in-Charge substandard or partly set cement

shall not be used and shall be removed from the site by the contractor with the

knowledge of the Engineer-in-Charge, as soon as it is detected. The cost of

such cement shall be recovered from the Contractor by the Developer/Owner

at penal rates, instead of issue rate, which will be double of the issue rate.


Page 15

5.2 Aggregates

Aggregates shall be stored on planks or on steel plates or on concrete or

masonry bins. Each size shall be kept separated with wooden or steel or

concrete or masonry bulk heads or in separate stacks and sufficient care shall

be taken to prevent material at the edges of the stock piles from getting

intermixed. Stacks of fine and coarse aggregates shall be kept sufficiently

apart with proper arrangements for drainage. The aggregates shall be stored in

easily measurable stacks of suitable depths as may be directed by the

Engineer-in-Charge.

1.3 Proportioning of Concrete

The proportioning of all materials, forming concrete shall be as per IS 383-

1970 or directed by the Engineer-In-Charge. The contractor shall provide all

necessary equipment and plant to determine and control the actual quantity of

materials entering into each batch. The proportioning will be changed

whenever, in the opinion of the Engineer-In-Charge, it is necessary, in order to

maintain the standard of quality required by these specifications. The

contractor is to give the proposed mix design for review and approval by the

Engineer-in-Charge.

Cement will not be gauged by volume but the size of concerted batch would

be such as to require the use of a bag or bags of cement. For the purposes of

computations, the volume of each bag of 50 kg shall be taken as 0.034 cum.

During the concreting operations of some of the smaller components of work

the Engineer-In-Charge may, however, permit adoption part bag batch under

strict supervision.

The coarse and fine aggregates shall be gauged by wooden “Frames” or

measures of approved size suitable to measure quantity of aggregate for the

required mix correctly. When filling “Frames” the material shall be poured

loosely and struck off level. No compaction shall be allowed.

Quantity of water to be used in litres per bag of cement for each type of

concrete will be determined and fixed by the Engineer-in-Charge. Only the

quantity of water, so fixed, will be used for preparing the concrete. The water


Page 16

measuring device to be used by contractor will be such that it discharges the

measured quantity of water into the mixer quickly without any spillage, and

that no leakage from it occurs when it is closed. Adjustments in the mixing

water for moisture cement in aggregate shall also be made from time to time

as per the directions of the Engineer-in-Charge.

The times for obtaining uniform mix for a particular type of concrete shall be

initially determined by the Engineer-In-Charge, and the same time shall

thereafter be adhered to for mixing in all subsequent batches of that type of

concrete, unless revised by the Engineer-In-Charge. The workability of the

mixed concrete shall be determined in accordance with IS: 1199-1959 or

subsequent amendments or revisions.

5.4 Mixing of Concrete

5.4.3 Mechanical Mixing

For all works concrete shall be mixed in tilting type mechanical mixers which

along with other accessories shall be kept in good working condition and

maintained throughout the construction period. Mixing shall be continued till

materials are uniformly mixed and a uniform colour of the entire mass is

obtained and each individual particle of the coarse aggregate shows complete

coating of mortar containing its proportionate amount of cement. In no case

shall the mixing be done for less than 2 minutes after all the ingredients have

been put into the mixer.

1.4 Workability

Unless otherwise provided the concrete shall be so controlled that the slump at

all times is kept between 25 mm and 75 mm or as directed by Engineer-In-

Charge-In-Charge when tested in accordance with IS: 1199-1959 or its

subsequent amendments.

1.5 Quality

Samples for testing concrete, as mixed, will be collected by the Engineer-In-

Charge for all classes of mix (a) when being delivered from the mixer, and or


Page 17

(b) when being placed in the forms and tested in accordance with the relevant

IS Specifications (IS: 1199-1959 and IS: 516-1959). The Contractors shall

provide all facilities for the collection of concrete samples free of cost to the

Engineer-In-Charge. He will also make arrangements for transporting and

depositing these samples for testing at the laboratory or at Owner’s field,

office as per the directions of the Engineer-In-Charge.

Test operations of the concrete shall be carried out by the contractor under the

supervision of the Engineer-In-Charge, to determine the average strength of

concrete of each class of mix. The average strength of all test samples of a

particular mix taken during a day shall not be less than the acceptable strength.

The Engineer-In-Charge will specify the strength of the concrete to be laid by

the contractor. Laboratory tests as per standard practice would be carried out

with the use of specified aggregate to determine the cement concrete required

to give desired strength in structure. The rate of concrete shall be adjusted if

the consumption of cement is less or more than the specified in the Schedule

of bids.

Cement concrete cubes (size of cube is 15x15x15cm) shall be tested for

compressive strength at 28 days.

The frequency of sampling, the number of samples etc. and the acceptance

criteria for the concrete work shall be as laid down in IS: 456-2000 or its latest

edition.

All the relevant records regarding the quality of work shall be maintained by

the contractor or the Engineer-In-Charge according to the instructions issued

by the Engineer-In-Charge.

In case, the concrete is not accepted, the work will have to be dismantled and

redone by the Contractor at his own cost.

1.5.1 Conveying

Concrete shall be conveyed from the mixers to the forms as rapidly as

practicable by methods, which shall prevent segregation or loss of ingredients.


Page 18

There shall be no vertical drop greater than 1.5-2.0 meters except where

suitable device is provided to prevent segregation or where specially

authorised by the Engineer-In-Charge. Use of chutes etc. for transportation of

concrete shall be subject to the approval of the Engineer-In-Charge. Such

equipment shall be suitable modified by the Contractor at his cost to prevent

segregation and to suit the working conditions of any specific part of the work,

where necessary.

5.8 Placing of Concrete

5.8.1 General

Concrete shall be deposited as soon as possible in its final position and worked

rapidly into the corners and angles of the forms and around all reinforcement

and embedded items without permitting the materials to segregate. Free water

collected in depressions in forms shall be removed by bailing out prior to

placing of fresh concrete. The method shall be subject to the approval of the

Engineer-In-Charge. No concrete shall be placed until all formwork,

installations of embedded parts and placement of reinforcement steel,

preparation of surfaces and necessary cleanup has been approved and

measurements recorded. The contractor shall keep on the Engineer-In-Charge

informing about the schedule for placing concrete. Unless inspection is waived

off in each specific case, placing of concrete shall be performed only in the

presence of an authorized representative of the Engineer-In-Charge.

5.8.2 Time Interval between Mixing and Placing

No cold joints shall be allowed to be formed. Concrete shall be placed before

the initial set has occurred i.e. within thirty minutes of release from mixers

unless otherwise authorized by the Engineer-In-Charge.

5.8.3. Re-tempering of Concrete

Retempering of concrete will not be permitted. Any concrete which has

become so stiff that proper placing cannot be assured, shall be discarded.

5.8.4 Lifts in Concrete


Page 19

The permissible depth of concrete placed in one lift or course will be

determined by the Engineer-In-Charge for approximately horizontal layers not

exceeding fifty centimeters in thickness. The placement shall be carried at

such a rate that all concrete surfaces set to grade shall not have reached their

initial set before the additional concrete is placed thereon. Slabs shall

generally be placed in one layer unless the depth is so great that this procedure

will produce objectionable results. In walls, the layers shall terminate at the

top and bottom of door and window openings and shall terminate at such

levels as well conform to architectural details.

5.8.5 Rate of Placement of Concrete

Concreting shall be continued without avoidable interruption, until the

structure or section is completed or until a satisfactory construction joint can

be made Concrete shall not be placed faster than the placing crew can compact

it properly. The rate of deposition shall be such as to have no adverse effect on

the placement of concrete, particularly near the forms and around the

embedded equipment/metal work where the rate of placing shall not exceed

the limitations placed by the Engineer-In-Charge.

5.8.6. Placing Concrete through Reinforcement

At the time of placing the concrete through reinforcement, care shall be taken

so that no segregation of the course aggregate occurs.

5.8.7 Adverse Weather Conditions

No concrete shall be placed during rain, high winds, dust-storms, Freezing

temperature, excessive heat and other similar adverse weather conditions

without the prior approval of the Engineer-In-Charge. In extreme weather

conditions concreting shall be done in conformity with IS: 7861 (Part I and

Part II) latest editions. No claim shall lie against the Owner on account of any

action by the Engineer-In-Charge in this behalf.

5.8.3. Replacement of Rejected Concrete

Concrete which is not placed and compacted in accordance with these

specifications and is in the opinion of the Engineer-In-Charge of inferior


Page 20

quality shall be removed and replaced by the Contractor. The entire cost of

removing and replacing such rejected concrete shall be borne by the

Contractor including the cost of all materials required in the replacement.

5.9 Vibration of Concrete

Soon after placement of concrete, proper spreading and tamping shall be done.

Concrete shall be consolidated to the maximum practicable density so that it is

free from pockets of entrapped air between coarse aggregate and closes snugly

against all surfaces of forms and embedded materials. The vibrations shall be

of the internal type, or adequate size and capacity. The vibrators shall be of the

internal type, of adequate size and capacity, and shall at all times be adequate

in number or units so as to properly consolidate the concrete. Form vibrators

shall not be used unless specifically approved by the Engineer-In-Charge.

Internal vibrators shall have vibrations of not less than 7000 impulses per

minute when in operation while submerged in the concrete. The amplitude of

vibration shall be sufficient to produce satisfactory compaction. The duration

of vibration shall be limited to that necessary to produce adequate compaction

without causing objectionable segregation and shall continue until bubbles of

entrapped air have practically ceased to escape. While compacting each layer

of concrete, the vibrating needle shall be allowed to penetrate and vibrate the

concrete in the upper portion of the under lying layer in the same lift.

Subsequent layers of concrete shall not be placed until the layers previously

placed have been worked thoroughly as specified. The disturbance of

reinforcement embedded in concrete beginning to set shall be avoided. Care

should be taken to avoid contact of vibrating head with the surface of forms.

5.10 Equipment not to be disturbed

Once placement of concrete has commenced at a given location, it shall not be

interrupted by diverting and placing the equipment to other locations.

5.11 Finishing of Concrete Lift Surface

The top surface of each lift shall be finished to level by adequate vibration to

produce not only the degree of consolidation desired in the surface layers of

concrete but also a surface with the desire degree of roughness for bond with


Page 21

the next lift. Surface vibration or excessive surface working including screed

of any kind will not be permitted in placing concrete. Coarse gravel protruding

form the surface of the lift shall be worked down into the mass during the

compacting or vibrating operations. All top surfaces not covered by forms and

which are not to be covered by additional concrete or back filled shall be

carried slightly above grade, as directed by the Engineer-In-Charge and stuck

off by board finish. After the top surface of the lift is finally compacted, it

shall be immediately and carefully protected from pedestrian traffic, running

water, heavy rains or any activity which may in any manner effect the setting

of the concrete, or damage it.

5.12 Construction Joints

When the work is to be interrupted, or the concrete surface upon or against

which fresh concrete is to be placed and to which new concrete is to adhere,

has becomes so rigid that the new concrete cannot be in incorporated

integrally with it, shall be defined as the construction joint. Construction joints

shall be provided at locations shown on the drawings or as directed by the

Engineer-In-Charge. All such surfaces shall be given the treatment as given in

the following paras before the subsequent pour of concrete.

5.12.1 Horizontal Joints

All horizontal construction joints in the work shall be sloped enough to

provide free drainage of clean up water. All such joints in exposed faces shall

be sharp, level and in straight line. Each joints shall be prepared to receive the

succeeding lift by having all loose or defective concrete coatings and foreign

materials removed by means of air-water jet applied at high velocity before the

concrete has taken its final set. However, in case it is considered undesirable

to disturb the surface of the lift before final set has taken place, surface cutting

by means of air-water jet will not be permitted. In such cases use of wet sand

blasting will be required after the final set. Where it is not practicable to clean

the joints after forms are fixed, these shall be cleaned by air-water jet or wet

and sand blasting and washed at the last opportunity prior to fixing of the

forms. The surface of such lifts shall again be washed with air-water jet just

prior to the placing of the successive lift of concrete in order to remove all


Page 22

foreign and loose material which may have accumulated since the first clean-

up. Manual scrubbing and chipping may be allowed by Engineer-In-Charge

where cleaning by sand blasting and air water jet may not be possible. The

surface of the lift when ready will be covered with an initial layer of mortar 10

to 15 mm thick and of the same cement proportion as in the concrete mix. The

surface of concrete before placing the mortar shall be thoroughly wet, but free

from any standing or excess water.

The method used in disposing of waste water employed in cutting, washing

and rinsing of concrete surface shall be such that the waste water shall not

stain, discolor or effect permanently exposed surface of the structure. The

method of disposal of the water shall be subject to the approval of the

Engineer-In-Charge.

5.12.2 Vertical Joints

All vertical construction joints shall be made with stop boards, which shall be

rigidly fixed and slotted to allow for the passage of reinforcing steel. If desired

by Engineer-In-Charge, keys and or dowel bars shall be provided at

construction joints. Water stops of approved material shall be provided if so

specified in the drawings or as desired by the Engineer-In-Charge. Concrete

shall be carefully placed against faces of the vertical construction joints so as

not to disturb the water seals etc. Whenever the placing of concrete is

interrupted long enough and the concrete has taken its final set, the working

face joints shall be roughened, cleaned thoroughly, wetted and shall receive

neat cement slurry before placing fresh concrete.

5.13 Stripping of Forms

Forms shall not be struck until the concrete has reached a strength atleast

twice the stress to which the concrete may be subjected to at the time of

removal of farm work. The strength referred to shall be that of concrete using

the same cement and aggregates, with the same proportion and cured under

conditions of temperature and moisture similar to those existing on the work.

Where possible, the form work shall be left longer as it would assist the

curing.


Page 23

In normal circumstances and where ordinary Portland cement is used, forms

may generally be removed after the expiry of the following periods:

(a) Walls, columns and vertical 24 to 48 hours or as

Faces of all structural may be decided by

Members Engineer-In-Charge

(b) Slabs (props left under) 3 days

(c) Beam soffits (Props left under) 7 days

(d) Removal of props (under slabs)

i) Spanning up to 4.6 m 7 days

ii) Spanning up to 4.5 m 14 days

(e) Removal of props (Under beams and arches)

i) Spanning up to 6.0 m 14 days

ii) Spanning up to 6.0 m 14 days

5.13.1 Curing and protection

All con crete shall be protected against injury until final acceptance. Exposed

finished surfaces of concrete shall be protected from the direct rays of sun for

at least 72 hours after placement. Fresh exposed concrete shall also be

protected from the action of rains, flowing water and mechanical injury.

No fire or excessive heat shall be permitted in direct contact with concrete at

any time. Concrete in which standard Portland cement is used shall be kept

continuously moist for atleast 7 days, by covering with water saturated

material or a system of perforated pipes, mechanical sprinklers or porous hose

or by any other approved method. All horizontal surfaces shall be

continuously kept wet till the next pour regardless of time. Curing shall be

maintained so as to prevent detrimental loss of water from the concrete during

the entire curing period. Curing period where special cement is used shall be

separated by the Engineer-In-Charge.

All conduits and other format openings through the concrete shall be closed

during the entire curing and as long thereafter as practicable to prevent

circulation of air and the resulting dying and cracking.


Page 24

Construction joints shall be cured in the same manner as the other concrete

and shall also, if practicable be kept most for atleast 72 hours prior to the

placing of additional concrete upon the joint. Horizontal surfaces shall be

cured by sprinkling water or by covering with damps and or may be cured by

the use of wet quilts or mars which will satisfactorily provide the required

curing water. If damp sand or quilt is used for curing, it shall later be

completely removed. The time of applying damp sand shall be specified by the

Engineer-In-Charge before which curing will be carried out by other approved

methods.

The method of keeping formed concrete surfaces moist shall be continues

sprinkling and spraying of water as may be necessary to prevent any portion of

the surface from drying out during the specified period.

All water and other material used in curing shall be free from excessive

amount of silt, colouring matter and other impurities which any stain the

finished work. The actual method of curing adopted shall be subject to the

approval of the Engineer-In-Charge. The contractor shall have own hand and

ready to install before actual contract placement is started, all equipments

needed for adequate curing and protection at all location of concrete

placement.

In limited areas and for special purposes the use of an approved and properly

applied compound may be permitted at the discretion of the Engineer-In-

Charge to restrict the evaporation of the mixing water. Such curing compound

shall be of the surface membrane type, which will not be used on joints.

The curing compound shall be used as directed by the Engineer-In-Charge.

The cost of curing compound and all operation involved in its use shall be to

the contactor’s account and shall be included in the unit price in the schedule

of bids for the concrete on which the curing material is used.

Finished concrete surface shall be protected from stains or abrasions. Surface

or edge likely to be injured during the construction period shall be kept

properly protected by living forms in place or erecting proper covering

satisfactory to the Engineer-In-Charge.


Page 25

In case, the curing operation are in adequate or unsatisfactory, the Engineer-

In-Charge shall be entitled to take such steps as he may deem necessary to

make such good the deficiencies and defects, at the contractor’s risk and cost.

5.14 Finishes and Finishing

5.14.1 General

All imperfection noticed in concrete after removal of forms should be

immediately attended to such as bulges, abrupt irregularities, outside the

required limits, needs to be taken care of honey combed, fractured or

otherwise defective concrete has to be built up to the prescribed limits/lines.

The requirements for finishing of concrete surface shall be as specified herein,

and in accordance with the symbols shown on the Drawings and defined in

Articles 4.16.2 and 4.16.3. Finishing of concrete surfaces shall be performed

only by skilled labour. Offsets, caused by displaced or misplaced forms of

form section or by defective form material will be considered as abrupt

irregularities and will be tested by direct measurement. All other irregularities

and be tested by use of a template, consisting of a straight edge of the

equivalent thereof for curved surfaces.

5.14.2 Formed Surfaces

The classes of finish for formed concrete surfaces are designated by use of the

symbols F1, F2, F3 aces to be painted and F4. Except for surfaces to be

painted and F4 finish surfaces, sack rubbing or sand blasting will not be

required on formed surfaces. No grinding or rubbing will be required or

formed surfaces, except as necessary for the repair of surface imperfections.

Recesses resulting from the removal of form ties shall be filled with dry pack,

except that filling of recesses in finish F1 surfaces will be required only if the

recesses are deeper than 25 mm in walls less than 0.3 m thick or if unfilled

recesses would reduce the required concrete cover of steel blend

inconspicuously with the surrounding surfaces for concrete that is expressed to

public view. The classes of concrete finishes for formed surfaces and their

applications shall be as follows:

F1 Finish: F1 generally applies to formed surfaces upon or against which backfill

concrete is to be placed. These surfaces require no treatment after form


Page 26

dismantling except removal and repair of defective concrete. Correction of

surface irregularities will be required for depressions only, and only for those

which, when measured as described above, exceed 2.5 cum.

F2 Finish: F2 generally applies to all formed surfaces not permanently concreted by

backfill concrete, and not requiring F3 or higher surface finish. Surfaces with

finish F2 will need no filling of form ties, recesses or sack rubbing and no

grinding other than that needed for repair of surface imperfections. Surface

irregularities, measured as described above, shall not exceed 6mm for abrupt

irregularities and 12 mm for gradual irregularities.

F3 Finish: F3 generally applies to all formed surfaces of structures prominently

exposed to public view where appearance is of special importance. There shall

be no visible offsets, fins, bulges, misalignment of concrete between

chamfered joints, and no stains or discoloration, other abrupt and gradual

irregularities such as depressions or honey combs. Misalignment of concrete

across chamfered joints shall not exceed 3 mm for abrupt irregularities and 12

mm for gradual irregularities.

F4 Finish:

Limits shall be treated as follows:

F4 generally applied to formed surfaces that could be subjected to rapid

water flow velocities. Abrupt surface irregularities shall not exceed 3mm for

irregularities not parallel to the direction of flow and shall not exceed 6mm for

irregularities parallel to the direction of flow. Abrupt irregularities exceeding.

Abrupt irregularities parallel to the direction of flow shall be reduced

to the specified limit by grinding to a bevel of not steeper than 1 to 50

ratio of height to length.

Abrupt irregularities not parallel to the direction of flow shall be

eliminated completely by grinding to a bevel of steeper than 1 to 50

ratio of height to length when the offset is into the flow, and by

grinding to a bevel not steeper than 1 to 20 for offsets away from the

flow.


Page 27

5.14.3 The classes of finish for unformed concrete surfaces are designated by

use of the symbols U1, U2 and U3. The classes of finishes for

unformed surfaces and their applications shall be as follows:

U1 – Finish U1 (screeded finishing) generally applies to unformed surfaces

for which U 1 is shown on the Drawings and unformed surfaces that

will be covered by backfill or by concrete. Finish U1 is also used as the

first stage of finish U2.

Finishing operations shall consist of sufficient leveling and screeding

to produce ever, uniform surfaces meeting the tolerances requirements

of 19 mm.

U2 – Finish U2 (floated and broomed finishing) generally applied to all

unformed surfaces not permanently concealed by backfill or concrete,

or for which finish U1 is not shown on the Drawings Finish U2,

brooming excluded, is also used as the second stage of finish U3.

Floating shall be started as soon as the screeded surface has stiffened

sufficiently, and shall be the minimum necessary to produce a surface

that is free from screed marks and is uniform in texture.

U3 – Finish U3 (trowelled finishing) generally applied to tops of parapets

exposed to public view, inverts of tunnels and spillways subject to high

velocity flow and indoor floors, except floors requiring a bonded

concrete finish. When the floated surface has hardened sufficiently to

prevent excess of fine material from being drawn to the surface, steel

trowelling shall be started. Steel trowelling shall be done with

sufficient pressure to flatten the sandy texture of the floated surface

and produce a dense uniform surface, free from blemishes and trowel

marks.

5.15 Measurement and Payment of Concrete

Measurement of all categories of concrete for payment will be made only to

the neat lines of the structure as indicated in the drawings or as modified by


Page 28

the Engineer-In-Charge. In measuring concrete for payment the volume of all

recesses passageways, openings, cavities and depressions, chambers and

embedded pipes except reinforcement bars, metal work and anchor bolts etc.

will be deducted. The unit rate for the purpose of payment shall include supply

of all materials, labour, T&P, scaffolding etc., needed for the completion of

the work under these specifications.

The cement consumed in the slurry or cement mortar in construction and lift

joints will be considered as bonafide use on the works. The contractor will

maintain proper account for the same as directed by the Engineer-In-Charge.

The proportion of the cement and sand in the slurry of cement mortar will be

the same as for the corresponding concrete. For the purpose of measurements

of concrete, payable to the Contractor, the slurry of cement mortar in

construction joints shall be treated as part of concrete and shall not be paid for

additionally.

No extra payment will be made for keeping the working area dry during

construction.

5.16 FORMS

5.16.1 General

Forms for placing concrete shall be either of steel and/or best quality

shuttering wood of non-absorbent type. Timber shall be free of Knots and

shall be of medium grain as far as possible. Plywood or equivalent shall be use

where specified to obtain smooth surfaces for exposed concrete work. The

formwork shall confirm to the shape, line and dimensions as shown on the

drawings.

The centering shall be true to shape and rigid and thoroughly braced both

horizontally and diagonally. The forms shall be sufficient strong to carry

without undue deformation the dead weight of the concrete at the time of

casting as well as working load. When concrete is vibrated the form work shall

be strong enough to withstand the effects of vibration. The joints in the form

work shall be sufficiently tight to prevent any leakage of mortar. The form


Page 29

work shall be such as to ensure a smooth uniform surface free from honey-

combs air bubbles bulges fins and other blemishes. Any blemish or defect

found on the surface of the concrete shall be rectified to the satisfaction of the

Engineer-In-Charge.

5.16.2 Cleaning and Treatment of Forms

All forms shall be thoroughly cleaned of old concrete wood shoving saw dust,

dirt and dust sticking to them before they are fixed in position. Before concrete

is placed in position, the surface in contact with concrete shall be treated with

approved non-staining oil or composition does not come in contact with

reinforcing steel or existing concrete surfaces. The oil and dust shall not be

allowed to accumulate at the bottom of shuttering.

5.16.3 Removal of Forms

Form shall be removed with the approval of the Engineer-In-Charge with care

so as to avoid damage to the concrete and if any damage through premature

removal of forms shall be rectified.

5.16.4 Embedment of Sills/Guides/Anchor Bolts etc.

The contractor shall take delivery of the embedment of steel and other

accessories, which do not form a part of his supply and embed them as per

requirement of design, drawings and specifications. No separate payment shall

be made for this item. If so required by the Engineer-In-Charge the contractor

shall provide blackouts for embedment as per plans furnished by him at

contractor’s cost. In case plates, bolts or any other embedment are required to

be fixed in the primary concrete in any part of the structure the same shall be

done by the contractor at his own cost. Such embedment bolts shall be

supplied by the Developer/Owner free of cost. The contractor shall also do the

necessary concreting in such blockouts. Such concrete would be measured and

paid as the rates of the items in the schedule of quantities and bids.


Page 30

5.16.5 Payment

The form work should be measured and paid separately as per the rate quoted

in the Tender.

6. STEEL REINFORCEMENT FOR STRUCTURES

6.1 General

The work covered under the head consists of furnishing, cutting, bending,

binding and placing in position and binding of reinforcement steel of shape

and dimensions shown on the drawings and as directed by the Engineer-In-

Charge.

1.1 Quality of reinforcement

The steel reinforcement shall be standard commercial quality and shall

conform to IS: 432-1966, IS 1139-1966 and its subsequent amendments for

mild steel bars and conform to IS: 1786-1985 and its subsequent amendments

for the steel bars. All steel used for reinforcement shall be clean, free from

loose rust, loose mill scale, oil, grease, paints, dust, mortar, or any rolling

defects. Bars with kinks or bends other than those shown on drawings shall not

be used.

1.2 Bending of Reinforcement

Bars shall not be bent or straightened in manner that will injure or weaken the

material. Bars shall be bent cold to the specified shapes and dimensions shown

or drawings or as directed by the Engineer-In-Charge using proper bar bender

operated by hand or power to attain proper radii of bends. Heating of bars for

bending shall not be allowed. The hooks at the end of plain mild steel bars

shall not have an inner diameter of less than four times the diameter of the

bars or as indicated on the drawings and shall have a length of straight part

beyond the end of the curve of at least four times the diameter of the bar.

The exact position, size and shape of the reinforcement may not be shown in

all cases on the drawings appended to these specifications and where not

shown they shall be in all respects as specified by the Engineer-In-Charge.


Page 31

Detailed drawings for reinforcement will be supplied by the Engineer-In-

Charge as soon as possible and according to the Construction Schedule.

6.4 Placing of Reinforcement

All reinforcing bars shall be accurately placed in exact position shown on the

drawings and shall be securely held in position during placing of concrete by

welding or by using stays concrete blocks or size and conforming to IS: 280

and by using stays, concrete blocks or metal hangers, supporting wires or

other approved devices at sufficiently close intervals. Bars will not be allowed

to sag between supports or displaced during concreting or any other operation

connected with the work. All devices used for positioning shall be of non

corrodible material. Wooden and metal supports will not extend to the surface

of the concrete except where shown on the drawings, pieces of broken stone or

brick and wooden blocks shall not be used. Layers of bars shall be separated

by spacer bars, precast mortar blocks or other approved devices. As far as

possible, bars of full length shall be use However, where this is not feasible,

overlapping bars shall be tied with annealed steel wire of not less than 1 mm

thickness twisted tight.

The overlaps shall be staggered for different bars and located at points along

the span where neither shear nor bending moment is maximum. Joints in steel

bars 25 MM diameter and above will be required to be welded as per the

standard practice or as approved by the Engineer-In-Charge.

Reinforcement after being placed in position shall be maintained in a clean

condition until completely embedded in concrete. Special care shall be

exercised to prevent any displacement of reinforcement in the concrete already

placed.

To protect reinforcement from corrosion, concrete cover shall be provided as

indicated on the drawings. All bars protruding from concrete and to which

other bars are to be spliced later and which are likely to be exposed for a

considerable length of time shall be protected by a thick coat of neat cement

grout.


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Bars crossing each other, where required, shall be secured by binding wire

(annealed) of size not less than I MM conforming to IS; 280 in such a manner

that they do not slip over each other at the time of fixing and concreting.

6.5 Measurements

Reinforcement (both mild steel and tor steel) shall be measured in length

separately for different diameters as actually used in the work including

authorized overlaps. From length so measured the weight of reinforcement

shall be calculated in kilograms by multiplying length and standard weight of

bar. Length shall include hooks at ends. However, the wastage, un–authorized

overlaps welding joints, spacer bars, chairs and annealed steel wire for binding

shall not be measured. The cost of these items shall be deemed to be included

in the unit rate for reinforcement.

Before starting concreting, the Contractor shall make certain that

measurements of the reinforcement placed have been recorded and the

Engineer-In-Charge certifies to the correctness of the reinforcement used.

Failure to do so might mean no payment at the unquestioned discretion of the

Engineer-In-Charge for the reinforcement concerned.

6.6 Rates

Rate for reinforcement steel (both mild and tor) shall include the cost of steel,

is cutting, bending, binding and placing in position as shown on the drawings

and directed by the Engineer-In-Charge. It shall also include the cost of all

devices for keeping reinforcement in proper position, cost of jointing

(including welding) as per approved method and all wastage’s overlaps, spacer

bars, chairs and annealed steel wire etc. No extra payment shall be made for

keeping the working area dry.

7 STONE WORK (RANDOM RUBBLE MASONRY)

7.1 General

This section covers the furnishing of all labour materials and equipment’s and

the performing of all operations required for the stone masonry work and


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incidental items pertinent thereto, all in accordance with drawings and these

specifications.

7.2 Materials

7.2.1. Stone

The stones shall be hard, sound and free from decay and weathering. They

shall be obtained from an approved quarry. Discoloured or distorted stones,

with boulder skin mica flex or stones with round surface shall not be used.

7.2.2 Stone shall be properly hammer dressed on the face, the sides and the beds to

enable to come in close proximity with the neighbouring stone. The stone

faces shall not project more than 4 cms on exposed face and one cm on

plastered face.

1. Water absorption shall not be more than 5% of the dry weight when

immersed in water for 24 hours when tested in accordance with latest

edition IS: 1124.

2. Los Angeles abrasion value shall not be more than 50% when tested

according to IS: 2686-1963 (Part-IV) or subsequent amendments.

3. Shall not show any cracking or excessive founding at edges of test

specimen when tested as per IS: 1126-1957) or latest edition.

7.2.3 Mortars

Cement conforming to IS: 269-1976 and sand from natural sources

conforming to IS: 2116-1980 shall be mixed in specified proportions given in

the drawings. Cement shall be proportioned only by weight by taking its unit

weight at 1440 kg per cubic meter and the sand shall be proportioned by

volume after making due allowance for bulking. The required quantity of

water shall then be added and the mortar mixed to produce a workable

consistency.

7.2.4 Mixing


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The mixing shall be done in a mechanical mixer unless hand mixing is

specifically permitted by the Engineer-In-Charge. If hand mixing is done, the

operation shall be carried out on a clean watertight platform. Cement and sand

shall be first mixed dry in the required proportion to obtain a uniform colour

and the mortar shall be mixed for atleast two minutes after the addition of

water. The mortar shall be used as soon as possible after mixing and before it

has begun to set.

7.2.5. Water

Water shall be clean and reasonable free from deleterious matter such as oils,

acids, alkalies, salts and vegetable growth and shall meet the requirement of

IS: 456-1978.

7.3 GENERAL REQUIREMENT

7.3.1. Laying

All stones shall be wetted before use. The wall shall be carried up truly plumb,

or to the specified batter. Face stones shall extend well into backing. These

shall be arranged to break joints as much as possible, and to avoid long

vertical lines of joints. Their height shall not be greater than the breadth at the

face or the depth inwards. The hearting or interior filling of the wall face shall

consist of rubble stone which may be of any shape but not pass through a

circular ring of 15 cm inner diameter, thickness of these stones in any

direction shall not be less than 10 cm. These shall be carefully laid, hammered

down with a wooden mallet into position and solidly bedded in mortar, chips

and spawls of stone being used whatever necessary to avoid thick mortar beds

or joints and at the same time ensuring that no hollow spaces are left anywhere

in the masonry. The use of chips shall be restricted to the filling of interstices

between the adjacent stones in hearing and these shall not exceed 20% of the

quantity of stone masonry.

The top of the masonry works shall be left flooded with water at the close of

the day’s work or for other periods of cessation. During this period, it shall be

suitably protected from all damages. Watering is to be done carefully so as not

to disturb or wash out the mortar.


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7.3.2 Bond Stones

Bond or through stones running right through the thickness of walls shall be

provided in walls up to 60 cm thick. If the walls are more than 60 cm thick,

two or more bond stones overlapping each other by atleast 15 cm shall be

provided in a line from face to back. At least one bond stone or a set of bond

stones shall be provided for every 0.5 Sq m. of wall surface.

7.3.3. Quoins

The quoins shall be of selected stones neatly dressed with the hammer or

chisel to form the required angle, and laid header and stretcher alternately. No

quoin stone shall be less than 0.030 cubic meter in volume.

7.3.4 Joints

Stones shall be so laid that all joints are full of mortar. Face joints shall not be

more than 2.5 cm thick.

7.4 Curing

Green work shall be protected from rain, sun etc. by suitable covering

Masonry work in cement shall be kept constantly moist on all faces for a

minimum period of seven days.

During hot weather, all finished or partly completed work shall be covered or

wetted in such a manner as will prevent rapid drying of the work.

7.5 Scaffolding

The scaffolding shall be sound and strong to withstand all loads likely to come

upon it. The holos left in the masonry work for supporting the scaffolding

shall be filled in.

7.6 Measurements

Stone masonry shall be measured in cubic metres nearest to second place of

decimal. The length, height and thickness shall be measured correct to a cm;


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the thickness of wall shall be measured at joints, excluding the bushing. Only

specified dimensions shall be allowed, anything extra shall be ignored.

7.7 Rates

The unit rate shall include the cost of the all materials, tools and plant, labour,

scaffolding and other items incidental to the satisfactory completion of the

work in accordance with the relevant drawings and or as directed by the

Engineer-In-Charge.

8 DAMP PROOF COURSE

8.1 General

This work shall comprise of providing and laying of Damp Proof Course

(DPC) in well masonry at plinth level or as directed by the Engineer-In-

Charge.

8.2 Materials

Unless otherwise specified the D.P.C. shall comprise of 40 mm thick cement

concrete and two coats of coaltar damp proof compound. Cement concrete

shall be of mix 1:2:4 (1 cement 2 coarse sand: 4 coarse aggregate of 12.5 mm

nominal size).

8.3 Laying of D.P.C.

The cement concrete shall be prepared as per specifications given in this as

described hereunder.

8.4 Before laying the concrete course, it shall be ensured that the plinth is leveled

both horizontally and transversely. It shall be cleaned of all loose mortar and

other materials. The masonry shall be thoroughly damp before the concrete

course is laid. Unless otherwise directed by the Engineer-In-Charge, the whole

of the damp proof course of each block or building shall be completed in one

day to avoid joints. Wherever this is not possible due to some reason, the end

of the day’s work shall be sloped off and the surface roughened, so as to form

a key for the following day’s work. The surface shall be given awash with


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cement slurry in the proportion 1: 1. The edges of the course shall be straight,

even and vertical. Uniform thickness as specified be ensured throughout the

length of the course. The top surface shall be roughened with crisis cross lines

15 cms. apart. The work shall be kept continuously wet for 10 days.

8.5 Application of Damp Proofing Compound

Surface to receive damp proofing shall be dry and free from all loose and

foreign materials. Before the first coat of damp proofing is applied all surfaces

showing pits/depressions in the concrete shall be repaired and cleaned

properly with brushes and finally with a piece of cloth soaked in kerosene oil.

Each coat of damp-proofing shall be uniform in thickness without streaks or

runs. The damp-proofing shall be protected from the direct rays of the sun for

the time the first coat is applied until 3 days after the last coat is applied.

Damp-proofing shall not be applied when the temperature is below 7 deg C

(45 F). Each coat of hot damp-proofing shall be applied at the rate of

approximately 1 litre to 1.5 litre per sq. meter of area. The second coat of

damp-proofing shall not be applied until the free water, if any, is absent from

the surface of the fist coat. The damp proofing compound need not be applied

by spraying, but the method used shall be subject to the approval of the Engineer-In-

Charge. Back filling shall not be started until 3 days after the last coat is applied and

care shall be taken not to puncture or otherwise damage the coating, when backfill is

placed. No masonry work over the D.P.C. shall be commenced until the latter has

been examined and approved by the Engineer-In-Charge.

8.6 Measurements

The D.P.C. shall be measured for its superficial area in sqm. The length and

breadth shall be measured correct upto 1 cm. A tolerance of +2 mm shall be

allowed. Deduction shall be made for door openings etc.

The rate shall be inclusive of all materials, labour, operations, T&P etc., for

proper completion of the work.


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9 CEMENT PLASTER IN CEMENT MORTAR (1:4)

9.1 General

The work of cement plastering to be done under these specifications shall

comprise of furnishing of all material, labour, T&P and scaffolding etc., and

preparing the surface as directed by the Engineer-In-Charge and carrying out

all operations needed for the execution of this item of work.

9.2 Materials

The mortar shall consist of ordinary Portland cement conforming to IS: 269

(latest edition) and sand mixed by volume in proportion of 1:4. The sand shall

be clean, fine, sharp siliceous silicon particles free from loam, clay, salts and

organic matters and shall conform to the requirement of IS: 1542-1977. Water

shall be clean, free from alkalies, oils, salts, acids and injurious amount of

organic matters. Potable water is generally considered suitable for this type of

work (IS: 456-2000).

9.3 Mixing

The cement and sand shall be separately measured in wooden boxes (prepared

for the purpose) in proportions specified in the schedule of quantities and or in

drawings. The cement and the sand shall then be mixed dry thoroughly until

the colour and the consistency of the mixture is uniform and shows complete

mixing. The quantity of the water to be added shall be between 30-40 litres per

bag of cement. Mortar once mixed shall be used preferably within 15 minutes

but in no case later than 30 minutes. No mortar which, has begun to cake or set

shall be used. Such mortar shall be immediately removed from the work site.

9.4 Surface Preparation

The masonry surface, which are to receive plaster shall be cleaned by

removing loose particles, dust, adhering mortar, grease oil, efflorescence and

other foreign matter. The joints in the masonry shall be raked to a minimum

depth of 12 mm for providing a key to the plaster. A wire brush may be used

with advantages for this purpose. The surface then shall be sprinkled with


Page 39

water and dumped evenly but not soaked, and kept as such for two days before

plastering. Dry spots, if any, shall be moistened again to ensure a uniform

bond.

9.5 Plastering

The plaster over the masonry work shall be as specified in the schedule of

quantities or as given on the relevant drawings. To ensure even thickness and a

true surface small patches of plaster measuring 15 cm x 15 cms shall first be

applied horizontally and vertically and or not more than 2 meter interval over

the entire surface to serve as gauges. The plaster shall then be applied in

between the gauges slightly more than the specified thickness and shall then

be brought to a true and even surface by working a wooden straight edge

reaching across the gauges.

9.6 Finishing

frequently as the work proceeds with a true straight edge not less than 2.5

meters long and a plumb bob. All horizontal lines and surfaces shall be tested

with a spirit level and all joints and corners with a plumb bob.

All corners, angles and junctions shall be truly vertical or horizontal as the

case may be and shall be carefully finished without rounding or chamfering.

Whenever there is a break in the continuity, the two portions of the plaster

shall be separated by a neat cut through the plaster at the junction.

In supporting the work at the end of the day, the plaster shall be left cut clean

to line, both horizontally and vertically. When recommending the plaster, the

edges of the old work shall be scrapped, cleaned and wetted with cement

slurry before the plaster is applied to the adjacent areas, to enable the two to

join together. Plastering work shall be closed at the end of the day on the body

of the wall and not nearer than 15 cm to any corner. It shall not be closed on

the body of such features as bends or corners. Horizontal joints shall not occur

in parapet tops and coping as these invariably lead to leakage. No portion of

the surface shall be left out initially to be patched up later.


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9.7 Curing

Curing shall be commenced as soon as the plaster has hardened sufficiently

not to be damaged when watered. The plaster shall be kept wet for a period of

atleast 7 days. During the period it shall be suitably protected from sun, rain

and frost at the contractor’s expense and by such means as the Engineer-In-

Charge may approve. Ordinarily to protect the plaster from the sun, the entire

surface shall be covered with wet gunny bags. The dates of plaster shall be

legibly marked on the various sections of the plastered surface so that curing

for the specified period thereafter could be ensured.

9.8 Defective Plaster

Any crack which appears in the plaster or any part which sounds hollow, or is

found to be soft or otherwise defective, shall be cut out in rectangular shape

and replastered at the contractor’s expense.

9.9 Mouldings

All mouldings shall be worked true to drawings with a properly constructed

template and drawn neat, clean and straight.

9.10 Measurements

The measurements shall be in sqm of the finished work – The length and the

breadth shall be measured correct to a cm. Deductions for openings etc. shall

be made as under:

a) No deductions will be made for openings or end of the joints, beams,

posts, girder steps etc., upto 0.5 Sqm. No additions shall be made either for

the jambs, soffits or sills of such openings. The above procedure will apply

to both faces of the wall.

b) For openings exceeding 0.5 sqm. but up to 3 sqm each, when only one face

of the wall is plastered and the other face is not plastered, no deduction

shall be made for the openings nor shall any addition be made for reveals,

jambs, soffits and sills etc.


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c) For openings exceeding 0.5 sqm. but up to 3 sqm each, when both the

faces of the wall are plastered, deductions shall be made as detailed below

but no additions shall be made for reveals, jambs, soffits, sills etc. of the

openings.

i) When both the faces of the walls are plastered with the same thickness

of plaster deduction shall be made for one plaster only.

ii) When the two faces of the walls are plastered with different

proportions of plaster or if one is pointed and the other face plastered,

deductions shall be made from the plaster or pointing on the side of the

frames or doors, windows etc., on which the width of reveals is less

and no deduction shall be made on the other side.

d) For openings with areas exceeding 3 sqm deductions shall be made for the

full openings on both the faces of the wall while at the same time jambs,

sills and soffits shall be measured for payment. In measuring the jambs,

soffits, sills, deductions shall not be made for the areas in contact with the

frames of doors, windows etc.

10 HOLLOW BLOCK MASONRY

10.1 General

This section covers the furnishing of all labour materials and equipment’s and

the performing of all operations required for the Hollow Blocks masonry work

and incidental items pertinent thereto, all in accordance with drawings and

these specifications.

10.2 Materials

The blocks should be made from cement concrete 1:2:4 (1 cement : 2 sand : 4

graded stones aggregate 20mm nominal size used crushed material. The

blocks should be cast in by machine.


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10.3 Size

The standard size of the hollow block should be 16” x 8” x 8” in cement

concrete 1:2:4 .1 cement : 2 sand : 4 graded stone crushed material will be

built in by machine with proper opening as per the direction of the Engineer-

in-incharge.

10.4 Test For Good Block

Before any hollow blocks is laid shall be tested for good strength and should

be properly be cured with water by sprinkling or by placing the blocks in

water.

10.5 Mortars

Cement conforming to IS: 269-1976 and sand from natural sources

conforming to IS: 2116-1980 shall be mixed in specified proportions given in

the drawings. Cement shall be proportioned only by weight by taking its unit

weight at 1440 kg per cubic metre and the sand shall be proportioned by

volume after making due allowance for bulking. The required quantity of

water shall then be added and the mortar mixed to produce a workable

consistency.

10.6 Mixing

The mixing shall be done in a mechanical mixer unless hand mixing is

specifically permitted by the Engineer-In-Charge. If hand mixing is done, the

operation shall be carried out on a clean watertight platform. Cement and sand

shall be first mixed dry in the required proportion to obtain a uniform colour

and the mortar shall be mixed for atleast two minutes after the addition of

water. The mortar shall be used as soon as possible after mixing and before it

has begun to set.

10.7 Water

Water shall be clean and reasonable free from deleterious matter such as oils,

acids, alkalies, salts and vegetable growth and shall meet the requirement of

IS: 456-1978.


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10.8 GENERAL REQUIREMENT

10.8.1 Laying

All hollow blocks shall be wetted before use. The wall shall be carried up truly

plumb, or to the specified batter. Face blocks shall extend well into backing.

These shall be arranged to break joints as much as possible, and to avoid long

vertical lines of joints. The hearting or interior filling of the wall shall consist

of glass wool which may be of any shape but not pass through the holes. These

shall be laid carefully with a wooden mallet into position and solidly bedded

in mortar, chips and spawls of stone being used whenever necessary to avoid

thick mortar beds.

The top of the masonry works shall be left flooded with water at the close of

the day’s work or for other periods of cessation. During this period, it shall be

suitably protected from all damages. Watering is to be done carefully so as not

to disturb or wash out the mortar.

10.8.2 Joints

Hollow blocks shall be so laid that all joints are full of mortar. Face joints

shall not be more than 2.5 cm thick.

10.9 Curing

Green work shall be protected from rain, sun etc. by suitable covering

Masonry work in cement shall be kept constantly moist on all faces for a

minimum period of seven days.

During hot weather, all finished or partly completed work shall be covered or

wetted in such a manner as will prevent rapid drying of the work.

10.10 Scaffolding

The scaffolding shall be sound and strong to withstand all loads likely to come

upon it. The holos left in the masonry work for supporting the scaffolding

shall be filled in.

10.11 Measurements


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Hollow Block masonry shall be measured in cubic metres nearest to second

place of decimal. The length, height and thickness shall be measured correct to

a cm; the thickness of wall shall be measured at joints, excluding the bushing.

Only specified dimensions shall be allowed, anything extra shall be ignored.

10.12 Rates

The unit rate shall include the cost of the all materials, tools and plant, labour,

scaffolding and other items incidental to the satisfactory completion of the

work in accordance with the relevant drawings and or as directed by the

Engineer-In-Charge.

11 White Washing and Colour Washing

11.1 General:

This article covers the furnishing of all material, labour equipment and

performing all operation required for the completion of the work of white

washing and colour washing on it internal faces of walls. Ceiling or at any

other location as deservedly the Engineer-In-Charge

11.2 White Washing

11.2.1. Materials

The wash shall be prepared from fresh and rich white lime of approved

quality. The lime shall be thoroughly slaked on the spot, mixed and stirred

with sufficient water to make a thin cream. This shall be allowed to stand for a

period of 24 hours and then screened through a clean coarse cloth. 40 grams of

gum dissolved in hot water shall be added to each 10 litre of the cream. Water

shall be added at the rate of 5 litre per Kg. of lime to produce the milky wash.

In order to avoid a yellowish tint, indigo (neel) up to 3 grams per litre of lime

dissolved may be added to the solution.

11.2.2. Preparation of Surface

The surface to receive the white wash shall be thoroughly cleaned of mortar

drops and any other foreign matter.


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11.2.3 Application

The surface that are to receive the white wash shall be thoroughly dried and

cleaned. The white wash shall be applied with brushes, the coats being laid

vertically and horizontally alternatively, each coat being allowed dry before

the next coat is applied. Further each coat shall be inspected and approved by

the Engineer-In-Charge, before the subsequent coats are applied.

Three or more coats shall be applied till the surface presents a smooth and a

uniform finish. No portion of the surface shall be left out initially to be

patched up later on.

The finished dry surface shall not show any sign of cracking and peeling nor

shall it come off readily on hand when rubbed.

Doors, windows, floors etc. shall be protected from being, splashed upon.

Droppings and splashings, if any, shall be, removed and the surface cleaned.

Damage, if any to the fittings and fixtures shall be recoverable from the

contractor.

11.2.4 Measurements

The method of measurements under this item of work shall be similar to that

for plastering.

11.3 Colour Washing

11.3.1 Materials

The solution for the work under the scope of colour wash shall be prepared in

a manner similar to that for white washing except that a mineral colouring

material approved shade and quality not affected by the lime, shall be added to

the white wash solution. Approximate quantity of the colouring material to be

added for making the colour wash would be 1 kg. for every 10-15 kg. of lime.

Inidgo (neel) shall, however, not be added to the solution.


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11.3.2 Application

No colour wash shall be applied until a sample of the same to the required unit

or shade has been approved by the Engineer-In-Charge. A base (printing) coat

of white wash shall be applied before giving the colour wash. Two or more

coats shall then be applied on the entire surface till it presents a smooth and

uniform finish. If blotchy or otherwise badly applied, it shall be redone by the

contractor on his own cost.

Other specifications as detailed for white washing shall be applicable to colour

washing also.

12. FLOOR FINISHES

12.1 General

Floor finishes shall be provided at various floors of Power House building and

elsewhere as specified on the drawings or as directed by the Engineer-In-

Charge. Necessary slope and small drain trenches in floor finish shall be

provided for floor damage as shown on the detailed drawings or as directed by

the Engineer-In-Charge.

12.2 Type of Floor Finishes

Various types of floor finishes as specified hereafter shall be provided at

different locations indicated on the drawings or as directed by the Engineer-In-

Charge.

12.2.1. Cement Concrete Floor Finish

12.2.1.1.General

The cement concrete floor finish shall be laid in accordance with IS: 2571-

1970 except that the floor finish shall be laid in panels of 1m 1m. The 1.5

mm thick top wearing layer shall be of cement concrete 1.2 and the under-

layer of cement concrete 1:2:4 and each layer shall be laid separately.


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12.2.1 Measurements

Measurements shall be made in sqm. The length and width shall be measured

from finished faces, correct to a cm. No deduction shall be made nor extra

payment for any openings upto 0.1 sqm. The unit rate shall also be inclusive of

the cost of aluminum/glass strip dividers.

12.2.2 Terrazzo (Mosaic) Floor Finish

12.2.2.1 General

The terrazzo floor finish shall be laid in accordance with IS: 2114-1984 except

that no cushioning layer shall be provided. Material for topping shall be as per

Clause 2.4 of IS: 2111-1984 and shall be of grade 2. Colour of terrazzo

finishes shall be as specified on the drawings or as directed by the Engineer-

In-Charge. Terrazzo floor shall have a minimum thickness of 50mm consisting

of 35 mm thick cement concrete (1:2:4) under bed and 15 mm terrazzo

topping. The floor shall be laid in panels of 1m 1m. with aluminum or glass

strip dividers.

12.2.2.2. Measurements

Measurements shall be made in sq.m. The length and width shall be measured

from finished faces, correct to a cm. No deduction shall be made not extra

payment for any openings upto 0.1 sq.m. The unit rate shall also be inclusive

of the cost of aluminum/glass strip dividers.

12.2.3 Acid Resistance Tile Floor Finish

12.2.3.1General

Acid Resistance Tile Floor finish shall be provided in the battery room. The

tiles shall conform to IS:4457-1982 except that cement mortar shall be Acid

Resistance.


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12.2.3.2Measurements

Measurements shall be based on the area covered with acid resistance tiles and

the unit of measurements shall be in sq. m. the lengths and widths shall be

measured correct to a cm.

12.2.4 Floor Hardening Treatment

12.2.4.1General

This section covers the furnishing of all materials, labour and equipments and

performing all operations necessary to provide the floor hardening treatment in

the machine hall and the service bay of the power house in accordance with

the drawings and specifications given hereunder.

12.2.4.2Materials

All materials such as cement, fine and coarse aggregates and water shall be as

per standards already stipulated. Metallic hardener of approved quality only

shall be used.

12.2.4.3 Application

A sub grade 38 mm thick of cement concrete (1 – Cement, 2 – Coarse Sand, 3

– Stone Aggregate of 20 mm nominal size) shall be laid in proper grade on

which hardening as specified herein shall be laid before the sub – grade sets.

The surface hardening treatment shall consist of laying a 12 mm thick concrete

of mix 1.2 (1 – Cement, 2 – Stone aggregate of 6 mm downgrade) with an

admixture of metallic hardener. The metallic hardener of approved quality

shall be mixed with cement in the ratio of 4:1 (4 Cement: 1 Metallic Hardener)

by weight. The ingredients shall be mixed dry before adding water. All the

operations for concrete floor shall be followed in laying the surface hardening

treatment.

Floor hardening treatment shall be applied after all the heavy construction

work has been completed and all machinery, equipment and piping have been

installed. All surfaces that are to receive this treatment shall be broom cleaned


Page 49

and be free from loose particles; any grease paint oil spots, asphalt and or tar

shall be removed; any projections such as nails, bolts or screws shall be cut off

flush with the slot/ concrete base. Any latency or scum shall be removed by

the use of stiff bristle brushes.

Immediately prior to placing the hardening topping the base slab/ plain

concrete sub – grade shall be thoroughly moistened and brush – coated with

neat cement grout to provide a mechanical bond for the surface application.

Expansion joints shall be formed by placing 20 mm thick wooden strips

running through the entire depth of the topping at all intersections with vertical

surfaces and of not more than 3 meter intervals across the floor surface. After

the curing, the wooden strips shall be removed and all joints shall be filled

with bitumen, asphalt or equivalent material.

12.2.4.4Curing

Curing shall be commenced within 24 hours of finishing the work and

continued for 7 days either by laying moist sawdust or by pounding water.

12.2.4.5 Measurements

Measurement shall be in sq. m. length and width shall be measured from the

finished surfaces, correct to a cm. No deductions shall be made nor paid extra

for any opening upto 0.1 sq. m. The unit rate shall be inclusive of the cost of

providing and fixing aluminum or glass strips dividers

13 DOORS, WINDOWS AND MISCELLANEOUS METAL WORKS

13.1 Doors

13.1.1 General

The work to be done under this head consists of furnishing, delivery and

installation at site of wooden flush doors, complete with all fittings such as

mortar rocks, door handles, but hinges and tower bolts. The size and types of

doors shall be indicated on the drawings or as directed by the Engineer-in-


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Charge. The installation of doors and fittings to be used shall be to the

satisfaction and approval of the Engineer-In-Charge.

13.1.2 Materials

Wooden flush doors shutters shall be of particle board solid core type with

commercial/ decorative plywood face panels and shall conform to IS:2202

(Part I) 1991and 2002 (Part II)- 1983.

Mortice locks of approved quality shall be of brass and shall conform to IS

2209 – 1976.

Door handles for mortice locks shall be of brass and shall conform to IS: 1341

– 1981.

Steel but hinges shall be of medium weight, size 125 mm and shall conform to

IS: 1341 – 1981.

Tower bolts shall be of brass and barrel type, 200 mm long with round knob

and shall conform to IS : 204 (Part I) or IS : 204 (Part II) 1978.

13.1.3 Measurements

Measurements for the purpose of payment shall be on the basis of the area of

the shutter in sq m. up to second place of decimal. The unit rate shall be

inclusive of the cost of door shutters, fittings and their installation etc.,

including all other items of work incidental to the completion of this job.

13.2 Windows

13.2.1 General

The work to be done under these specification shall comprise of furnishing,

delivery and installation at site steel glazed windows complete with fittings

and fixing lugs. The sizes of windows and other details shall be as per

drawings or as directed by the Engineer-In-Charge.


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13.2.2. Materials

The windows shall be glazed and shall conform to the requirements of IS:

1361-1978. Rolled steel sections used shall conform to IS: 7452-1990. Steel

sections used as vertical posts shall conform to IS: 226-1975.

Glass used shall be toughened glass not less than 6 mm thick and shall

conform to IS: 2835-1987 special selected quality.

Rubber channel used shall be of good commercial quality as approved by the

Engineer-In-Charge.

13.2.3 Measurements

Measurements for the purpose of payments shall be on the basis of the area of

the openings to outside dimensions of the frame excluding fins and anchors in

sq.m. up to second place of decimal. The unit rate shall be inclusive of the cost

of frames, fittings, fins, anchors, installation of glazing etc., and all other items

of work incidental to the work.

13.3 Rolling Shutter

13.3.3.1General

The work to be done under these specification shall comprise of furnishing of

labour, materials and equipments and performing all operations necessary to

complete the installation of a mechanically operated rolling shutter as shown

on the drawing complete with hood, guides, springs, bearings, handle etc.

13.3.2 Materials

The shutter curtain shall be preferably built up of suitably sized (atleast 60-75

mm wide) cold rolled steel sheets, interlocked together through their entire

length and joined together at ends by end locks and mounted on a specially

designed shaft complete with good quality counter balance springs etc. The

shaft shall be supported on suitably designed brackets securely fixed to the

concrete jambs.


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The curtain shall travel in channel guide grooves built up from structural

sections of suitable size. Channel grooves shall be secured to the jambs with

bolts of suitable size. The size of the guide channel shall be such as to retain

the shutter within the guides against the specified wind pressure.

A cylindrical hood made of galvanized steel of suitable gauge shall also be

provided on the top to enclose the shutter curtain when it is rolled up. The

hood shall be neatly formed and suitably reinforced to prevent deflection.

Manual operation shall be done by means of endless chain gearing or

removable crank and gearing.

The material used, the method of fabrication and installation work shall

conform to the latest editions of the relevant IS codes on the subject.

13.3.3. Shop Drawings

The contractor shall prepare the necessary drawings giving details of the

shutter and its accessories indicating the arrangements he proposes for the

installation and operation, of the rolling shutter and submit the same for the

approval of the Engineer-In-Charge. No fabrication work shall be undertaken

unless the shop drawings and the material proposed to be used has been

approved.

The shutter and other fixtures shall be so designed as to withstand the

specified wind pressure from either side of the opening when in closed

position.

13.3.4 Measurements

Measurements for the payment of this item of work shall be made in sq.m.

(correct to two places of decimal) of the actual opening to be covered by the

shutter. The unit rate shall be inclusive of all material, labour, installation etc.

including all other items of work incidental to the completion of this job.

13.4 Miscellaneous Metal Work

13.4.1 Hand Rails


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13.4.2 General

The work to be done under these specification shall comprise fabrication and

installation at site, complete in all respects, hand rails in the power house

building, forebay tank, desilting tank and elsewhere as per the drawings. The

steel handrail shall be of design as shown on the tender drawings and or as

approved by the Engineer-In-Charge and shall be fabricated from structural

steel with welded connections. Steel embedded plates shall be installed in

concrete during its placement at correct locations as indicated on the detailed

construction drawings. Where steel plates are not embedded in concrete, the

plates shall be installed by means of anchor fasteners. The vertical posts of the

handrails shall be welded to such steel plates. The hand rails shall be

manufactured in exact lengths required. Some portion of handrails may be

kept removable, if so indicated on the drawings.

13.4.3 Materials

Handrails shall be manufactured out of structural steel conforming to IS: 220-

1975 with its latest amendments. Welding shall be as per requirements of IS:

816-196, IS 1139-19669, IS 1786-1985. Anchor fasteners if used shall be of

good commercial quality, approved by the Engineer-In-Charge.

13.4.4 Measurements

Measurements for the purpose of payment shall be on the basis of the actual

weight installed. The unit rate shall include the cost of all materials,

fabrication, fixing in position and other item of work incidental to the

completion of this job. All cuttings and wastage of material shall also be

included in the unit rate.

13.5 Embedded Metal Work Around Floor Openings Where Steel Covers are

Provided

13.5.1.General

The work to be done under these specification shall comprise fabrication and

installation at site, complete in all respects, structural steel frames to be

embedded in concrete at the edges of floor openings where covers are included

on the drawings. The frames shall be fabricated outside in sections as per true


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dimensions shown on the drawings out of angle iron/channel sections with

adequate anchorage. All joints and members of the frames shall be welded.

Embedded metal work shall be accurately set in place as shown on the

drawings embedded in concrete.

13.5.2 Materials

The frames shall be manufactured out of structural steel conforming to IS:

226-1975 with its latest amendments. Welding shall be as per requirements of

IS: 816-1969.

13.5.3. Measurements

The payment for providing and fixing the frames shall be made on the basis of

the actual weight installed. The unit rate shall include all materials,

fabrication, fixing in position, all cuttings and wastage of material and any

other item of work incidental to the completion of this job.

13.6 Miscellaneous Embedded Metal and Metal Work (Part-I)

13.6.1 General

The work to be done under this clause consists of fabrication, delivery at site,

comprise in all respects, metal covers for floor openings and shall be as,

shown on the drawings. All metal covers shall be fabricated with suitable

lifting handles, where required, as per detailed drawings. The metal covers

shall be of steel plates with raised chequered patterns.

13.6.2 Materials

All metal works shall be of structural steel comprising to IS: 226-1975.

Chequered plates shall conform to IS: 3502-1981 and welding shall conform

to the requirements of IS: 816-1969.

13.6.3 Measurements

The payment for providing metal covers shall be made on the basis of the

actual weight installed. The unit rate shall include the cost of all materials,


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fabrication, fixing in position, all cuttings and wastage of material and any

other item of work incidental to the completion of this job.

13.7 Miscellaneous Embedded Metal and Metal Work (Part-II)

13.6.1 General

The scope of this item of work shall cover supply, and installation of

embedded steel frames of openings in floors, decks and walls, trenches etc.,

with suitable anchors. This item shall also include furnishing and installing

miscellaneous steel items in lighting fixtures, recesses, manhole frames and

covers, cable tray supports. Ladder, rungs, supports in sump well and gutter

cover plates, steel cover plates for asphalt seal recess in pipe sleeves and floor

gratings etc. as shown on the drawings and elsewhere as directed by the

Engineer-In-Charge.

Steel door frames failing under this item of work shall conform to IS: 1038-

1983.

13.7.2 Payments

Payments for furnishing and installing miscellaneous metal works shall be

made on the basis of the actual weight installed.

Payments for concrete shall be made as the unit price per cubic meter as given

in the schedule of bids. Anchors shall be measured for payment in terms of the

actual weight installed similar to mild steel reinforcement.

The cost of furnishing and installing all other minor miscellaneous items of

metal work for which specific unit prices are not provided in the schedule of

bids, shall be included in the schedule of bids for the work to which they are

related or as determined by the Engineer-In-Charge. Painting work wherever

applicable shall be as detailed. Clause 16.0 on “Painting of wooden/steel

structures” of this document.


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14 ROOF TRUSSES AND CGI SHEET ROOFING

14.1 General

The work to be done under these specification include design, fabrication,

supply and erection of tubular/structural steel trusses complete with purlins,

fixing accesses such as J/L-bolts, nuts, washers, anchor bolts, screw bolts

etc.

14.2 Design and Drawings

The roof trusses, purlins and fixing accessories etc. shall be designed by the

contractor in accordance with the loads specified in IS: 875-1987 (Part III)

with its subsequent amendments. The contractor shall get the design and the

detailed installation and fabrication drawings approved from the Engineer-In-

Charge before the start of the fabrication work. The contractor shall be fully

responsible for the safe design, proper fabrication and installation. Any defect

pointed out by the Engineer-In-Charge shall be rectified, promptly by the

contractor, without any extra cost to the Developer/Owner.

14.4 Welding

All welding shall be done by electric arc method. All welding rods required

shall be furnished by the contractor himself. They shall be of heavily coated

type, designed for all positions of welding. The size, type and manufacture of

the rods shall be subject to the approval of the Engineer-In-Charge. All butt

welds shall have complete penetration. Welding shall be done in accordance

with the IS Specifications (IS: 816-1969).

14.5 Painting

This shall be done as laid down in Clause 16 on “Painting of wooden/steel


14.6 Measurements

Measurements for payment will be based on the total sectional weight of steel

erected to the extent shown in the approved drawings excluding the weight of

the welds and bolts. Nothing extra shall be made in measurements for payment


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of this item. Foundation bolts shall be paid under the item of reinforcement

steel.

14.7 CGI Sheet Roofing

Roofing shall be of suitable gauge galvanized corrugated iron sheets secured

to the purlins on the top of the roof trusses by means of hook-bolts GI limpet

washers and bitumen washers etc. as specified by the Engineer-In-Charge.

14.8 Material Specification

The sheets shall be laid on purlins to a true plane surface, with the lines of the

corrugations running parallel to the slope from ridge to eaves. Each sheet will

be fixed to the truss atleast at 4 points places at the ridges of the corrugations

by means of galvanized L/J-bolts and nuts with limpet washers. Limpet

washers shall be fitted in conjunction with bitumen washers.

Each sheet shall be laid with 150 mm lap at the ends and a lap of two

corrugations on sides.

Holes for nails, screws, rivets etc. shall be made on the ground. The sheets

shall be placed on trusses and holes punched on the ridges of the corrugations

with very sharp punches and in such a manner that the axis of the punched

hole may come on the top of the sheet when laid. Unless otherwise specified

or ordered by the Engineer-In-Charge each sheet shall be riveted at the corners

and atleast once in breadth, and also at an interval of 300 mm to 600 mm

along its length.

14.10 Painting

This shall be as laid down in Clause-16 on “Painting of wooden/steel


14.11 Measurements

Measurements for this item shall be on the basis of the surface area covered by

the sheeting in sq.m. Neither the corrugations shall be measured nor any

additions be made for laps.


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14.12 G.I. Sheet Ridges

Ridges and hips shall be made out of suitable gauge galvanized plain iron

sheets as specified by the Engineer-In-Charge. After being placed in position

these shall be clipped or riveted to the CGI sheets with a 300 mm lap on each

side and fastened down securely in a manner as to prevent the rain water

driving under it.

Measurements for the purpose of payment shall be for the finished length

installed, including overlaps. The unit rate shall include the cost of all

material, fabrication, installation, T&P, labour and accessories etc.

14.13 Gutters

Gutters shall be made into rectangular, semicircle or to any other section as

specified by the Engineer-In-Charge out of 18 gauge galvanized plain iron

sheets. For connection to the down pipe, a proper drop end or funnel shaped

connecting pieces shall be made out the G.P. iron sheets of the same thickness

as the gutter and riverted together, the other end tailing into the socket of rain

water pipe. The gutters shall be laid with a minimum fall of 2.5 cm in every 3

m lengths and shall be supported on and fixed to M.S. flat iron brackets bent

to slope. The brackets shall be placed at not more than 1.2 m apart. The gutters

when fixed shall be true to line and slope and shall be leak proof.

15 G.I. WIRE BOULDER CRATES

15.1 General

The work under these specifications shall comprise of installing of boulder

blocks (crates) at locations indicated on drawings or as directed by the

Engineer-In-Charge, including supply of box type wire mesh crates to sizes

required, filling of boulders in the crates and tying up the adjacent crates

together.

15.2 Material

15.2.1 The boulders used for filling the G.I. wire crates shall be hard, durable and

free from excess of flat, elongated, soft and disintegrated particles and other


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objectionable matter. The boulders shall be well graded and the smallest size

shall not be less than 50mm + diagonal size of wire mesh..

15.2.2 G.I. Wire

8 SWG, galvanized iron wire of standard quality shall be used for making the

crates. Rusted or bad G.I. wire shall not be used. The wire crates shall be

woven to sizes shown on drawings or as directed by the Engineer-In-Charge

and made into – boxes with lid on the top. The mesh after weaving shall not be

more than 150 mm.

15.3 Filling of Boulders in Crates

After the foundation has been prepared to the satisfaction of the Engineer-In-

Charge, the wire crates of the specified size shall be placed in position. These

will then be packed with boulders in a manner as to leave minimum voids.

After the crates have been filled up to the top, the lids shall be placed in

position and tied together securely so that all the blocks act as one mass and

do not open up while the water is passing over them. The top surface of the

crates shall conform to the drawings. Care shall be taken when packing with

boulders the crates are not damaged.

15.4 Measurements

Boulders crates shall be measured and paid for in cubic meters on the basis of

the thickness and the area covered. The unit rate shall include the cost of wire,

its weaving into crates, carriage to site, cost of boulders at site filling up of

crates, lying up of crates including the cost of all T&P labour etc. No

deductions shall be made for voids.

16. STONE / BOULDER PITCHING

16.1 General

The work of stone pitching to be done under these specifications shall

comprise of furnishing of all material, T&P, labour etc. and preparing the

surface as directed by the Engineer-In-Charge and carrying out of all

operations required for the execution of this item of work.


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16.2.1 Boulders/Stones

Boulders/stones to be used for pitching of bank slopes profiles shall be hard,

durable and free from excess flat, soft and disintegrated particles and other

objectionable matter. These shall be well graded and the least dimension shall

not be less than 200 mm.

16.2.2 Laying

The pitching shall be carried up regularly and evenly as per drawings. When

any portion of the pitching has to be extended it has to be stopped at the joints

in a slope not exceeding 45 with the horizontal. The pitching shall be hand

packed and so laid as not to allow picking out of boulders by hand. The

interstices shall be well packed with stone chips or bajri or as directed by the

Engineer-In-Charge. The top of the pitching shall be finished plane and

present a neat appearance.

16.3 Payment:

Stone Pitching shall be measured and paid for in cubic meter on the basis of

the thickness and area covered. The unit rate shall include the cost of boulders

at site placing and lying up at sites including the cost of all T & P labour etc.

No. deductions shall be made for voids.

17 PAINTING OF WOODEN/STEEL STRUCTURES

17.1 Materials

Paints, varnishes and oils shall be of approved brand and manufacturer and of

the required shade. They shall conform in all respects to the relevant IS

specifications. Superior quality ready mixed paint as received from the

manufactured without any admixture shall only be used. If for any reason

thinning is necessary in case of ready mixed paint the brand of thinner as

recommended by the Contractor or as instructed by the Engineer-In-Charge

shall be used. Approved paint or oils shall be brought to the site of work by


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the contractor in their original containers in sealed condition. The materials

shall be brought in at a time in adequate quantity to suffice for the whole work

or atleast a fortnight’s work. The material shall be kept in the joint custody of

the contractor and the Engineer-In-Charge.

17.2 Commencing Work

Painting shall not be started until the Engineer-In-Charge has inspected the

items of work to be painted, satisfied himself about their proper quality and

given his approval to commence the work. Painting except the primer coat,

shall only be taken in hand after all other building works have practically been

completed.

17.3 Preparation of Surface

17.3.1 Iron & Steel Work

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 allowed to dry thoroughly before priming coat is applied.

17.4 Application of Priming Coat

All the new wood and iron work shall be given a coat of primer. The primer

coat for metal work shall be of red oxide and that for woodwork of non-

colouring matter. This shall be readymade and of approved brand and

manufacture. The primer shall be applied with brushes, worked well into the

surface and spread even and smooth. After the priming coat is applied holes,

cracks and indentations on the wood surface shall be stopped with glaziers

putty or wood putty, as may be required and all knots properly filled with

quicklime. In case of wood surface that comes in contact with soil shall be

treated with wood preservative.

17.5 Application of Paint

Before pouring into small containers for use, the paint shall be stirred

thoroughly in its container. Also when applying the paint, it shall be


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continuously stirred (in small containers) so that the consistency is kept

uniform. The painting shall be done evenly and smoothly by means of

crossing and laying off, the latter in the direction of the grain of wood. The

crossing and laying off will constitute one coat. The priming coat shall have

dried completely before painting is started as specified by the paint

Manufacturers.

Where so stipulated the painting shall be done with spray, spray-machine used

may be (a) high pressure type or (b) a low pressure type, depending on the

nature and location of the work to be carried out. Skilled and experienced

worker shall be employed for this class of work. Paints used shall be brought

to the requisite consistency by adding suitable thinner. Spraying should be

done only when drying conditions prevail.

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

and fine pumice stone and leaned off dust before the next coat is laid. No

painting shall be carried out on exterior work in wet whether or on surfaces,

which are not thoroughly dry.

No left ever paint shall be put up 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 corner of

panels angles of mouldings etc. shall be left on the work.

In painting or varnishing doors and windows the putty around the glass panes

must also be painted but care must be taken to see that no paint stains etc. are

left on the glass. Top of shutters and surfaces in similar hidden locations shall

not be left out in painting.

In painting steel work special care shall be taken while painting over bolts, nut

rivets, overlaps etc.


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17.6 Brushes and Containers

After work, the brushes shall be completely cleaned of paint, varnish and

linseed oil by rinsing with turpentine oil. A brush in which paint is dried up is

ruined and so shall not be used for painting work. When the paint has been

used the containers shall be cleaned with turpentine oil and wiped dry with

soft clean cloth so that they are clean and can be used again.

17.7 Protection

All paintings shall be neatly and carefully finished off and the contractor shall

be held responsible for any damage done by dropping, or smearing paint

where it is not required and shall make good the same, removing superfluous

patches or stains of paint or varnish by means by turpentine oil or as otherwise

desired.

17.8 Measurements

Measurements for the purpose of payment shall be made in sq.m. correct upto

two places of decimal, in the manner given below:

1. Doors and windows of all kings and moulded work of all types such as

cornices etc. shall be measured flat.

2. Fully parallel and flush shutters painted on both sides shall be measured as

two times the area of the opening.

3. Part panelled and part glazed shutters painted on both sides shall be measured

1.75 times the area of the opening.

4. Fully glazed wooden shutters painted on both sides shall be measured 1.50

times the area of the opening.

5. Wire gauze shutters painted on both sides shall be measured as one time the

area of the opening.


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6. Broad and battered shutters painted on both sides shall be measured as one

time the area of the opening.

7. Fully glazed steel shutters painted on both sides shall be measured as one time

the area of opening.

8. Iron gates, iron gratings, iron grills, expanded metal and similar work painted

all over shall be measured as 1/2 times the area of the opening.

9. Collapsible gates painted all over shall be measured, as 1.5 times of the area of

the opening.

10. Rolling shutter painted all over shall be measured, as 2.5 times of the area of

the opening.

11. Corrugated iron and A.C. sheeting as in roofs and partitions painted on one

side only shall be, measured as 1.20 times of the flat area.

12. Iron work in heavy sizes such as trusses, purlins, R.S. joists and similar work

shall be measured as per actual area painted. No extra shall be paid for

painting on bolt heads, nuts, washers etc.

17.9 Rates

The tendered rates shall include the cost of all material and labour involved in

all the operations described above and, shall also include the cost of ladders,

cans, scaffolding and all tools and plants required for proper completion of the

work.

18 CONTRACTORS JOINTS WATER SEAL STRIPS, ASPHALT SEALS AND

JOINT FILLERS

18.1 Construction Joints

Construction joints shall be constructed in power house, other appurtenant

works and elsewhere as directed by Engineer-In-Charge. The joint shall be

made by forming keys on the one side of the joints and allowing it to set


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before concrete is placed on the other side of the joint. The surface of the

concrete first placed at the contraction joints shall be coated with approved

sealing compound.

The entire cost of furnishing the sealing compound and of constructing

contraction joints shall be included in the unit price therefore in the schedule

of bids for the concrete in which joints are placed.

18.2 Metal Sealing Strips

18.2.1 General

Metal seals or metal sealing strips of copper shall be placed in joints in the

powerhouse and appurtenant structures where shown on the drawings and

elsewhere as directed by the Engineer-In-Charge. The contractor shall furnish

all materials for metal sealing strips, to the forms. The details of the shape and

of the placing of sealing strips will be as given on the drawings or as directed

by Engineer-In-Charge. The sealing strips shall be joined carefully together by

brazing so as to form continuous water tight diaphragms in the joints.

Adequate provision shall be made to support and protect the sealing strips

during the progress of the work. The contractor shall replace or repair to the

satisfaction of the Engineer-In-Charge, any metal sealing strips punctured or

damaged before the final acceptance of the work.

18.2.2 Materials

A material for metal sealing strips shall confrom to the relevant IS

specifications.

18.2.3 Metal Sealing Strips

Metal seals or sealing strips shall be of copper conforming to relevant IS

specifications or as approved by the Engineer-In-Charge.


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18.2.4 Miscellaneous Materials

Miscellaneous materials not covered herein by detailed specifications shall be

of the best standard commercial quality, of a type and composition approved

by the Engineer-In-Charge.

18.2.5 Measurements and Payments

Measurements for payments for furnishing and installing, metal sealing strips

will be made on the basis of the weight of sealing strips exclusive of the

weight of brazing. Payment for furnishing and placing metal sealing strips in

the power house and appurtenant works will be made at the unit price per

kilogram as given in the schedule of bids, which shall include the cost of

furnishing, storing, handling, forming, cutting, brazing and placing the sealing

strips, furnishing all brazing rods, washers and maintaining the metal sealing

strips free from damage as described in this clause.

18.3 Rubber/ PVC Water Stops

18.3.1 General

Rubber and PVC water stops should correspond to CWC or applicable Indian

Standards and shall be got approved by the Engineer-In-Charge before

installation. These will be placed at contraction joints of power house and

elsewhere as directed by the Engineer-In-Charge. The rubber water stops will

be of the hollow bulb and flat dumbbell type and shall be 225 mm in width.

The PVC water shall be corrugated, with centre bulb and with end grip, type

and 305 mm wide. The contractor shall furnish all materials for installing and

jointing the water stops including connection plates, gun rubber, rubber

cement, bolts, tools, etc.

18.3.2 Storage

The water stop shall be stored in a place as cool as practicable preferably at

the 700

C or less and in no case shall rubber be stored in the open or exposed

to the direct rays of the sun. all rubber/ PVC water stops shall be stored so as

to permit free circulation of air around them.

All field connections shall be made as directed by the Engineer-In-Charge.

The contraction shall take precautions to support and to protect the water stops


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during the progress of the works and shall replace or repair at his own expense

any water stops which are damaged before final acceptance of the work.


Measurements for payments for placing rubber/PVC water, stops will be made

of the number of linear meters of the water stops installed. Payment for

rubber/PVC water stops shall be made at the unit price per linear meter for the

item in the schedule of bids which shall include the cost of furnishing all

materials, tools, equipment, labour, installation etc.

18.4 Joint Fillers

18.4.1 General

The joint fillers shall be used at contraction and expansion joints. The joint

filler materials and coal tar damp proofing compound for coating the first

placed concrete shall be furnished by the contractor as approved by the

Engineer-In-Charge and conforming to IS standards.


Measurements for furnishing and placing joint filler will be made to the

required neat lines, and the areas of all the openings will be deducted.

Payments for furnishing and placing joint filler will be made at the unit price

per sq. m. for the item in the schedule of bids. Unit price shall include the cost

of all materials, labour and equipment required for the construction of the

expansion joints as described in this clause.

FABRICATION AND ERECTION OF PENSTOCK

19.1 General

The scope of these specifications covers complete design, fabrication, supply,

transportation to site, erection, testing and commissioning of steel penstock(s)

of diameter, as specified, length as needed to complete the job and thickness

not less than the calculated thickness as per design calculations including a


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reasonable allowance for corrosion, complete in all respects including shop

and field painting.

All accessories listed hereunder besides pipes, bifurcation/ trifurcation pieces,

reducers, bends, make up pieces, steel test bulk heads, required for carrying

out hydraulic pressure tests whether in shop or in the field, shall also be

provided and installed by the Contractor.

(i) Manholes with manhole covers

(ii) Air vents

(iii) Fill pipe and drainage pipe connections

(iv) Expansion joints

(v) Base plates for saddle including embedded parts, if any

(vi) Flanged connections to match the turbine Inlet valve

(vii) Piezometric connections, if required

All these items shall be fabricated/ supplied in accordance with the approved

design and drawings and shall be of materials specified in the drawings.

The work of fabrication and erection of steel penstock(s) shall be carried out

in accordance with the drawing(s) approved by the Engineer-In-Charge with

additions, alterations and modifications made from time to time and also

according to any other drawings that may be supplied to the contractor, during

the operation of the contract.

All operation except concreting is covered under these specifications.

19.2 Specifications

The item wise detailed specifications are intended for general description of

quality, workmanship, etc., desired for the items covered in the schedule of

items. The specifications are not, however, intended to cover all the minutest

details and the work shall be executed according to the spirit of the tender


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specifications. In the absence of specifications, the particular items or work

shall be executed as per relevant IS codes.

19.3 Materials Specifications

The penstocks – straight pieces and bends shall be fabricated from ERW

(electric resistance weld) or spiral welded steel pipes API tested and

manufactured by Steel Authority of India Ltd. (SAIL) in their Rourkela

Works./Tata or equivalent. Pipes (both ERW and SW) will be in accordance

with IS:3589 FE commercial quality and works tested to customer’s

specifications.Alternatively this could be manufactured from M. S. Plates

conforming to latest edition of IS:2062 (Tested Quality) by cold rolling and

welding. Wye pieces (Bifurcater) and reducer pieces shall in any case be

manufactured from M. S. Plates conforming to latest edition of IS:2062

(Tested Quality) and IS:2002 Grade 2a (Tested Quality).

The materials and equipment used in the fabrication, manufacture and erection

of penstock(s) shall comply with the appropriate specifications of the Bureau

of Indian Standards (formerly Indian Standards Institution). Recommended

list of standards specifications for materials and workmanship is given at

Annexure – I.

19.4 Test Certificates

Test certificates in respect of all materials used in manufacture/ fabrication/

erection of penstocks shall be submitted by the contractor in triplicate before

using such materials.

19.5 Design

The design and plate thicknesses of various pipes, bends bifurcation/

trifurcation pieces, reducer’s etc. show in the specification drawings are

tentative. The contractor shall check the design and work out plate thickness

based on latest guidelines/ codes of practice issued by Bureau of Indian

Standards and modify the design wherever necessary. The contractor shall

assume full responsibility for the complete design of the entire installation


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covered under these specifications. The maximum permissible design stresses

shall be as mentioned in Para 19.6 below

19.6 Permissible Stresses

Stresses in the material used for fabrication shall be limited to the following;

(i) Direct compression/tension 0.45 of yield point stress

(ii) Tension in bending 0.45 of yield point stress

(ii) Shear Stress 0.35 of yield point stress

(iv) Bearing Stress (in steel) 0.35 of yield point stress

(v) Bearing Stress (in concrete) 40 kg/ sq. m.

19.7 Layout

The setting out for all structures etc. shall be done by the contractor, at his

own cost, from the general grid of the plot and benchmarks given by the

Engineer-In-Charge. He shall give all help with instruments, materials and

men to the Engineer-In-Charge for checking the layout and levels. The

contractor shall be solely responsible for correctness of laying of penstock(s).

The checking and approval of the Engineer-In-Charge will not absolve the

contractor of the responsibility of erection the equipment in true alignment

and in accordance with the drawings and specifications.

Making benchmark pillars and references line pillars etc., and maintaining

them till the completion of the work shall be the responsibility of the

contractor. No extra payment shall be made for such services.

The Contractor shall complete all preliminary work at site as well before the

arrival of the fabricated/ manufactured pipes, such as, keeping in readiness

winches, mobile crane, jig poles, all tools and tackles, welding sets etc. of the

contract and other work that may be necessary to start erection immediately

after the fabrication.

The contractor shall arrange an adequate number of erection equipment,

supervision, labour and other arrangement so as to carry out the work

effectively and in specified time schedule.


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19.8 Drawings to be Furnished by the Contractor

The contractor shall prepare all necessary shop drawings noted below,

covering the details of fabrication of material, to be furnished under these

specifications and shall be responsible for the correct filling of all the pans.

a. Assembly drawings giving exact sizes of sections and identification marks of

various sections.

b. Dimensional drawings of bend wye pieces, reducer sections, manholes,

closing sections, test bulk heads etc.

c. Complete bills of materials and detailed drawings of all sections and also their

billing weights.

d. Any other drawing or calculation that may be required for checking the

correctness of design and/ or fabrication details.

Before fabrication is undertaken the contract shall submit to the Engineer-In-

Charge for approval, three prints of all shops drawings covering all details of

manufacture/ fabrication. The Engineer-In-Charge shall have right to ask the

contractor to make any change in the contractor’s drawings, which may be

necessary in the opinion of the Engineer-In-Charge, to make the furnished

construction conform to the requirements of the specifications without

additional cost to the Engineer-In-Charge. Approval by Engineer-In-Charge

shall not be construed to relieve the contractor of any obligation to meet any

or all the requirements of these specifications or of the responsibility of the

correctness of Contractor’s drawings.

19.9 Deviations from Specifications

For deviation of any item of work, for any valid reason, the Contractor shall

submit the proposed deviations explaining the reasons for the same for the

approval of the Engineer-In-Charge, before making any change.

19.10 Fabrication

19.10.1Preparation


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The fabrication of steel penstock shall be in accordance with these

specifications and requirements of last edition of IS: 2825. Where the

requirements of this code are in conflict with the requirements of these

specifications, the more stringent condition out of the two shall govern.

Each pipe section shall be made with the number of welds, as the length and

size of plates might permit. Normally longitudinal joints shall be located at

quarter points and staggered between adjoining sections. Longitudinal joints

shall not intersect manholes or other outlets, if any. In the ease of hands, the

longitudinal joints shall be staggered 450

to the plane of bend. The normal

length of each section shall be three to five meters. The contractor shall ensure

that each shop fabricated section can be transported to site conveniently and

economically and it can be handled for erection safely.

19.10.1.1 Cutting of Plates

Plates to be welded shall be cut accurately to size and shape either by gas or

machines shearing. Cold shearing may be resorted provided that the sheared

edge is cut back through machining or chipping for a distance of one quarter

of the plate thickness but in no case less than 3 mm.

19.10.1.2 Preparation of Plate Edges

All edges shall show sound metal free from laminations, surface cracks and

other defects. Any material damaged in the process of cutting plates to size or

forming grooves shall be removed by machining, grinding or chipping Flame

cut edges shall be uniform and smooth and shall be free from loose scale, slag

accumulations and burnt metal.

The ends of the pipe sections shall be normal to the axis of the pipe within a

tolerance of 2 mm on the radius. The edges of the plates of each section shall

be properly prepared for field welding.

All plates shall be bent and rolled cold to true circular section, with the

curvature but by blow will not be permitted. Particular care shall be taken in

matching the edges of adjoining plates and sections to ensure that the inner


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surfaces of the pipe section are in continuity within a maximum allowable off

set, at any point of 2 mm. Allowance shall be made for shrinkage due to

welding the circumferential joints and care shall be taken to maintain within

close tolerance the lengths selected for field assembly so that when the pipes

are completely assembled and erected, the overall length will be as shown on

the drawings. Ends of adjoining sections to be field welded together shall fit

properly and shall not vary in the inside circumference by more than 10 mm.

Ends of adjoining sections, where necessary, shall be machined before

welding to make the faces in true plane normal to the axis of the pipe.

19.10.2 Alignment and Tolerances

The shell sections of the complete penstock(s) shall be circular within the

limits specified. Measurements for this purpose shall be made in the surface of

the parent metal and not at the weld, fitting or other raised parts. There shall

be no flats or peaks at welded seems and any local departure from circularity

shall be gradual.

The difference between the maximum and the minimum diameter at any

cross-section of shell welded longitudinally shall not exceed 1% of the

nominal internal diameter with a maximum of D1+1250/200. Where D1

is the

internal diameter in mm.

Before any welding is commenced, it shall be ensured that the prepared edges

are in alignment to meet the requirements of the welding process and defects

in alignment at the surface plates are not more than;

(i) 10% of the nominal plate thickness with the maximum of 3 mm for

longitudinal joints.

(ii) 10% of the maximum nominal plate thickness plus 1 mm with a

maximum of 4 mm for circumferential joints.

19.10.3 Flanges, Bolts etc.


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All flanges including bolts, gaskets, piezometer connections and plugs as may

be required shall be installed in the steel liner sections as shown on the

drawings or as directed by the Engineer-In-Charge.

Bolts, nuts and studs shall be made out of steel conforming toIS: 1363-1992,

IS: 1364-1992andIS: 1862-1975. Gasket material shall conform toIS: 638-

1979.

Flange required to make the Turbine Inlet Valve shall either by procured from

the Turbine Inlet Valve Contractor or shall be manufactured as per the design

and requirement of the Turbine Inlet Valve Contractor. This shall also apply

to bolts, nuts, gasket etc.

19.10.4Bends and Fittings

All bends and reducers shall be made of short segments of pipe with mitered

ends. The bends shall be made with equal deflection angles except for the end

ones which shall be half of the deflection of other sections. The number of

sections shall be as shown in the drawings.

19.10.5Expansion Joints

Expansion joints wherever provided for the penstock shall be furnished as per

approved design and drawings complete with bolts, studs, nuts, packing etc.

The sleeves of the expansion joints shall be formed accurately to the required

dimensions in order to provide close stuffing boxes for the packing and to

ensure water tight joints. While the inner surface of the outer sleeve of the

expansion joint shall be machined, the outer surface of the inner sleeve shall

either be given a nickel cladding or machined smooth and metallised with

stainless steel (for a distance of 150 mm on either side of packing) to prevent

corrosion and facilitate smooth movement of packings. The longitudinal welds

on outside of the inner sleeve and inside of the outer sleeve shall be ground

flush. The packing material shall consist of long fiber braided flax or rubber

rings impregnated with suitable lubricant. The size of the rings shall vary from

12.5 mm to 32 mm (1/2 to 1/14”) square and the number of rings to be

provided shall vary from 3 to 10 depending on the size of the joints and the


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internal pressure of the pipe. All the parts shall be carefully fabricated with

close tolerance between the sliding surfaces and an allowance of 3 mm on the

dimensions.

19.10.6Anchor Blocks & Saddles

All the embedded metal other than reinforcement steel required to be

embedded in anchor blocks and saddles shall be furnished under these

specifications. Such material shall be furnished well in advance to match the

concreting schedules.

19.11 Welding

19.11.1General

Surfaces to be welded shall be clean and free from mill scale, rush, paint or

any other foreign matter. All welding will be performed by electric arc

method using a process which will exclude the atmosphere from the molten

metal and where practicable automatic welding equipment shall be used. All

welding shall be done in accordance with the requirements of fabrication and

inspection as specified in the relevant IS codes. All welding electrodes

required for the fabrication and installation of the penstock(s) and accessories

covered under these specifications shall be furnished by the contractor. Where

weld is deposited in successive layers such layers shall be cleaned all slag and

other deposits before the next layer is deposited. Tack weld joints shall be

chipped or flame gouged to sound metal before depositing weld metals to the

back sides of the joints. Defects in welds shall be chipped or flame gouged

until sound metal is reached on all sides and the resulting cavity shall be

rewelded. The welding of temporary attachments to the penstock sections for

the purpose of handling or aligning of sections shall be limited to essential

requirements subject to the approval of the Engineer-In-Charge. All such

attachments shall be removed by careful chipping and flame cutting and any

damage to sections shall be repaired by welding, if required. All longitudinal

and circumferential welds in the pipe shells and for the ends of stiffener rings

shall be of double weld but joint or single weld but joint. The root of the

welds shall be chipped to clean sound metal and weld shall then be deposited

to obtain full penetration. After the welding is completed, all weld spatter


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shall be removed by grinding. All welding shall be performed under cover and

penstock sections to be welded shall be protected from excessive cold and

humidity. All welds which fail to pass the specified test(s) shall be repaired to

the satisfaction of the Engineer-In-Charge. Defects in the weld cavities shall

be filled in the same manner as the original grooves were filled after gouging.

19.11.2Welding Procedure

The welding procedure to be followed shall conform to latest edition of IS:

4353-1967.

19.11.3Qualification of Welders

All welders assigned to manual welding shall have successfully passed the test

conducted by the contractor as prescribed for welder qualification as per IS:

817-1966.

19.12 Unit and Match Making

Each part of the steel penstock and its auxiliary parts shall be legibly marked

to show the unit of which it is a part and match to show its relative position in

the finished structure to facilitate assembly in the field. Each section shall be

marked to show top of vertical diameter and the direction of flow.

The contractor shall prepare marking drawings of the penstock assembly

indicating clearly the location of each section and appurtenant part in the

completed structure and shall furnish to the Engineer-In-Charge with such

drawings.

19.13 Despatch and Transport

The contract shall include and provide for securely protecting and packing the

material so as to avoid damage in transit and the Contractor shall be

responsible for all losses or damage caused by or occasioned by any defect in

packing and the Engineer-In-Charge will take no responsibility on this

account.


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Each piece, sub-assembly or package dispatched separately shall have its

identification mark distinctly embossed or painted on its container and shall

be labeled or tagged with description label mentioning the specification/part

number, and the mark number of piece or the number of the parts grouped in

such assemblies or contained in the package. Each sub-assembly or package

shall be prepared so that slings for handling may be attached whenever

required. Where it is unsafe to attach slings to the box, the boxed parts shall

be packed with slings attached to the pans and the slings shall project

throughout the box so that the attachment can be made readily. All exposed

finished surfaces shall be adequately protected against abrasion during

transport and all long and slender pieces shall be adequately supported and

blocked.

All transport and handling from the Contractor’s works to the site-store and

from the site-store to work-site shall be done by the Contractor without any

extra charge. Before despatch, the contractor shall determine the net weight of

each piece or assembly that is to be despatched as a unit and finished weight

exclusive of boxes, crates or skids shall be furnished to the Engineer-In-

Charge and shall be painted on the respective pieces, or assemblies or stated

on tags attached thereto.

19.14 Tests during Fabrication and Erection

The contractor shall carry out the tests specified below and submit the test

reports in triplicate to the Engineer-In-Charge.

19.14.1Weld Tests in Shop

All longitudinal shop welds shall be subjected to one of the following tests to

ensure their soundness:

IS: 3658 – 1981 Code of practice for liquid penetrate

flow detection of welds.

IS: 3658 – 1981 Code of practice for magnetic particle

flow detection of welds.


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These tests will not be required in case tested spiral welded pipes or ERW

pipes have been used by the Contractor.

All circumferential welds made in the shop irrespective of the fact whether

penstocks are manufactured out of MS Plates or from spiral welded pipes or

ERW pipes shall be subjected to one of the two above mentioned tests.

19.14.2 Weld Test in Field

19.14.2.1 Radiographic Examination

For quality assurance of the welding work in the field the welded joints shall

be subjected to inspection and non-destructive testing as specified below.

While all the longitudinal joints shall be radiographed for full, the

circumferential field joints shall be spot radiographed for 10% of their length.

In addition, 100 mm of field circumferential joints on either side of the

longitudinal joints shall also be tested radiographically as per IS: 2825,

IS:2595, IS: 1182 and IS: 4833.

19.14.3 Hydraulic Pressure Test in Shop

Each shop assembled penstock straight section, each bend and each reducer

shall be tested in the shop (Contractor’s premises) under hydrostatic pressure

equal to 1.5 times the design pressure. The design pressure for the hydraulic

test shall not exceed the pressure computed with the standard formula.

Each pipe shall be completely filled with water and the pressure shall be

slowly and uniformly increased until the required test pressure is reached. The

test pressure shall be applied and released three times successively and after

each application shall be steady, for atleast 15 minutes or till such time all the

welded joints and plate can be examined for defects, leaks etc. Any, defects in

welds or plates disclosed by the hydro-static test shall be repaired by the

Contractor to the satisfaction of the Engineer-In-Charge and all repaired

sections shall be re-tested hydrostatically.


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19.14.4 Leakage Test at Site

This test will be carried out by filling the completely erected with water from

forebay with the bulk head placed at the power house end of the penstock, i.e.

just upstream of Butterfly Valve. All field/shop joints and the expansion joints

shall be thoroughly checked for leakage, expansion joint gland packing shall

be tightened within the permissible limits, and suitable remedial measures to

stop leakage, if any, will be taken by the Contractor to the entire satisfaction

of the Engineer-In-Charge.

19.14.5 Thermal Stress Relieving

All specials like the Penstock pipe with manholes, bends, expansion joints

bifurcation/trifurcation pieces, (ring girders, fabricated rocker supports etc.)

shall be stress relieved. The stress relieving shall be carried out after all

welded connections have been attached to the penstock. Such stress relieving

shall be done, before the hydrostatic test but after repairs of welding. When

welding repairs have been done to a part which has been earlier heat treated,

the same shall be heat treated again, unless such rectification are of very

minor nature. The stress relieving shall be carried out in accordance with IS

Code for unfired Pressure Vessels.

19.15 Inspection during Manufacture and Erection

19.15.1General

The Engineer-In-Charge and his duty authorized representative shall have, at

all reasonable times, access to the contractor’s premises or works/shops and

shall have the power to inspect and examine the materials and workmanship

of the manufactured parts during their manufacture and/or erection.

The Engineer-In-Charge, shall on giving seven days notice, in writing, to the

contractor, setting out any grounds of the objection, which he may have in

respect of the work, be at liberty to reject all or any materials, plants or

workmanship, which is in his opinion is defective for any reason whatsoever,

provided that if such notice be not sent to the contractor within a reasonable

time after the grounds upon which such notice is based shall come to the


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knowledge of the Engineer-In-Charge, he shall not be entitled to reject the

said materials, plant or workmanship on such grounds.

Unless specifically provided otherwise, all tests shall be made to the

Contractor’s works before shipment.

The contractor shall give the Engineer-In-Charge or any material being ready

for testing and the Engineer-In-Charge or his authorized representative shall,

on giving 24 (twenty four) hours prior notice in writing fifteen days of the

date on which the material is notified as being ready, failing which, the

contractor may proceed with the tests, which shall be deemed to have been

made in the presence of the Engineer-In-Charge and duly certified copies of

such tests in triplicate shall be furnished to the Engineer-In-Charge.

19.15.2 Test at Contractor’s Premises

In all cases where the Contractor provides for tests whether at the premises of

the contractor or sub-contractor or work site, the contractor except where

otherwise specified, shall provide free of charge, labour, material, electricity,

fuel, water, storage facilities, apparatus and instruments, as may reasonably be

demanded, by the Engineer-In-Charge, to carry out efficiently such tests of the

manufactured parts/equipment in accordance with the contract. He shall also

provide facilities to the Engineer-In-Charge or to his authorized representative

to accomplish such testing.

When the tests have been satisfactorily completed at the Contractor’s premises

or works the Engineer-In-Charge shall issue a certificate to that effect.

19.16 Erection

19.16.3General Details of Erection

The steel penstock(s) shall be assembled and installed in place accurately to

line and grade subject to following deviations;

i) Alignment – not more than 6 mm in 30 m length


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ii) Grade – not more than 6 mm in 30 m length

and embedded in concrete or covered with backfill or held, securely by means

of steel strips over the anchor blocks as shown on the drawings or as directed

by the Engineer-In-Charge. Bends for the penstock(s) shall be erected first and

concrete anchors alongwith holding down bolts and straps shall be constructed

and properly cured before installing the penstock sections between the

anchors. Installation of the straight lengths shall then be started from the

anchors When assembled and ready for welding, the distance between the

ends of adjoining sections which are to be connected together by

circumferential weld shall not be greater than 6 mm and not less than 3 mm

unless otherwise directed. Care shall be exercised to avoid excessive lengths,

growth or shrinkage in pipe lengths. The Contractor shall furnish and install

such permanent structure, temporary supports, including holding down straps

and internal bracings as may be required to support the penstock securely in

place and prevent distortion during erection, welding and placing of covering

material without any additional cost. However, the embedment of timber

supports will not be permitted. After the penstock(s) have been erected and

embedded or held securely in position by straps or anchor blocks, the

Contractor shall remove all internal bracing’s debris and foreign matter from

inside of the penstock.

Before erection is started the Contractor shall supply a complete set of

erection schedule and erection drawings to the Engineer-In-Charge for

approval.

19.17 Painting

19.17.1General

The penstock steel liner shall be cleaned and painted as hereafter specified.

The Contractor, shall furnish, prepare and supply all materials for cleaning,

painting and coating of the penstock and its accessories. Machine state

surfaces, screw threads and surfaces that will be in rolling or sliding contract

will be shop coated with a rust preventive compound and if painting is

required shall be cleaned and painted in accordance with the painting


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schedule. Cleaning, painting or coating shall be performed prior to, during or

after installation of the penstock(s) subject to the approval of the Engineer-In-

Charge.

19.17.2 Painting Schedule

Surface preparation, cleaning and painting shall be done in accordance with

the following schedule:

S.No Item Method of o

surface

preparation

Paints or coating

No.

1 Exterior surface that will encased in

concrete

A No painting or coating

2

Machined surface that will be in rolling or

sliding contract and that will not

lubricated

A Gasoline soluble rust

preventive compound

3

Exterior surface that will be exposed to

atmosphere

B

i) Redled priming

paint type IV

ii) Phenolic resin

aluminum paint

2

2

4

Exterior surface that will be covered with

backfill

B Relevant American water

works Association

specification

5 All ferrous surfaces or joints B Cold applied coal tar paint

or coal tar epoxy

3

19.17.3 Preparation of Surfaces for Painting

Surface preparation shall be in accordance with anyone of the under

mentioned two methods. Weld spatters, burrs of any other objectionable

surface irregularities shall be completely removed or repaired by any suitable

means before cleaning. Any grit or dust remaining from the brushing, air

blowing, suction or other effective means. Should the surfaces become


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otherwise contaminated in the internal between cleaning and painting,

reclining will be required.

METHOD A – All oil grease and dirt shall be removed from the surface by

the use of clean mineral spirits, xylol or white gasoline and clean wiping

material.

METHOD B – All oil grease and dirt shall be removed from the surface by

the use of clean mineral spirits, xylol or white gasoline and clean wiping

materials, except for surfaces, which require coal tar coatings, the cleaning the

solvent shall be xylol. Following the solvent cleaning, the surface to be

painted shall be cleaned of all rust, mill scale and other tightly adhering

objectionable substance by sand blasting or grit blasting to base metal.

19.17.4 Application Procedure of Paints

Red led priming paint shall be applied in one or more coats as herein

specified. One coat of primer, except that an additional brush coat of primer

shall be applied without thinning over all the nuts welds, both etc. Thinning

shall be allowed, if necessary, to improve application properties and if

permitted, shall be with mineral spirits not exceeding 1 litre of thinner per 8

litres of paint. The coverage shall be 9 sq.m. perlitre (400 s, ft. per gallon).

Rust preventing compound shall be applied by any convenient method which

will ensure coverage of the surface with a heavy uniform coating.

19.17.5 Repair and Protection of Coatings

Metal work that has been shop painted or field painted shall be handled with

care so as to preserve the coating in the best possible condition. Before

proceeding, Contractor shall clean and repair all areas of shop coat, which are

defective and damaged. Areas that are loose, weakly bonded, blistered,

abraded, rusted or otherwise defective shall be removed to clean metal by

scrapping, chipping, wire brushing or other effective means.

Areas thus prepared shall be cleaned of all dust, dirt and other contamination’s

using clean rags and clean solvent. These surfaces shall then be repainted in


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accordance in accordance with the painting schedule. Hairline cracks or thin

areas of coal tar epoxy which are otherwise undamaged shall be cleaned of all

dust, dirt or other contamination’s and shall be recoated with additional coal

tar point/epoxy will be required to pass acceptance tests performed by the

Engineer-In-Charge. The cleaning and painting of damaged areas shall be at

the Contractor’s expense.

19.18 Completion and Acceptance of Works

19.18.1 Final Acceptance

The final acceptance of the penstock(s) will be given only after the successful

completion of field hydrostatic test for leakage (leakage) as specified earlier.

This final acceptance will not in any way absolve the contractor of his

responsibility for any damage that may occur to penstock(s) within one year

of its commissioning.

19.18.2 Taking Over

When all performance tests called for by these specifications have been

successfully carried out, the plant shall be accepted and taken over. After it

has been satisfactorily put into operation at site or within one month of its

being ready to put into operation, whichever may be earlier, the Engineer-In-

Charge shall alongwith issue a taking over certificate.

In the event of final or any outstanding tests being held over until the plant is

erected, such taking over certificate shall be issued subject to the results of

such final or outstanding tests which shall be carried out in accordance with

clause “Testing at site”.

When the specifications call for tests ‘at site’ the plant shall be taken over and

the taking over certificate issued immediately after such tests have been

satisfactorily carried out.

If for any reason, other than the default of the Contractor, prescribed test at

site cannot be carried out within one month of the notice by the Contractor to

the Engineer-In-Charge the plant being ready for tests, the plant shall be


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deemed to have been taken over on the last day of such period and payment

due to the Contractor on taking over shall be made, but the contractor shall, if

called upon to do so by the Engineer-In-Charge at the Engineer-In-Charge’s

expense carry out the said tests during maintenance period and accept the

obligations as specified in clause – ‘testing at site’.

The Engineer-In-Charge shall not delay the issue any taking over certificate

contemplated by this clause on account of minor defects in the plant which do

not materially affect the commercial use thereof. It shall, however, be

obligatory on the part of the contractor to rectify such defects.

19.18.3 Rejection of Defective Penstock Pipe

If the completed penstock pipe or any portion thereof, before it is taken over,

be defective, or fails to fulfill the requirements of the contract, the Engineer-

In-Charge shall give the contractor notice setting forth particulars of such

defects or failures and the contractor shall forthwith make the defective plant

good or alter the same to make it comply with the requirements of the

specifications/contract.

Should he fail to do so within a reasonable time, the Engineer-In-Charge may

reject and replace at the cost of the contractor, the whole or any portion of the

penstock pipe as the case may be, which is defective or fails to fulfill the

requirements of the specifications/contract. Such replacement shall be carried

out by the Engineer-In-Charge within a reasonable time and at a reasonable

price and where reasonably possible, to the same specifications and under

identical/comparable conditions. The contractor’s full and extreme liability

under this clause shall be satisfied by the payment to the Engineer-In-Charge

of the extra cost, if any, of such replacement delivered and/or erected as

provided for in the original contract. Such extra cost being the difference

between the price paid by the Engineer-In-Charge, for such replacements and

the contract price for the penstock pipe so replaced and the repayment of any

sum paid by the Engineer-In-Charge to the contractor in respect of such

defective penstock pipe within a reasonable time. The contractor’s full and

extreme liability under this clause shall be satisfied by the repayment of all


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money paid by the Engineer-In-Charge to him in respect of steel penstock

pipe.

19.18.4The unit rate quoted and accepted shall be considered to include all costs i.e.

cost of materials, fabrication, plant and equipment tools, labour, loading,

unloading, handling, transport, all shop tests including hydraulic pressure tests

in the contractor’s works/shop, cleaning, painting, cement wash, erection,

hydraulic and other tests at site etc. complete as required for all the operations

specified in addition to those specifically so provided or otherwise so

specifically directed for any particular element of work.

19.19 Basis of Payment

Payment for each of items will be made at unit rates as finalized and accepted.

The pipes including the welds shall be considered as continuous pipes.

Finished length of penstock(s) as laid in position shall be measured and their

weight calculated on the basis of weight calculated on the basis of sectional

measurements. At the bends, the lengths along the axis of each bend shall be

measured and weight calculated there from.

20. GATES AND TRASHRACKS

20.1 Scope

The contractor shall design, fabricate/ manufacture, supply, paint, erect, test

and commission the trash racks and gates listed below, including gate frames,

supply of first stage embedded parts if any, supporting structure, hoisting

operating mechanism and other accessories required to complete the job

including 2nd

1. Penstock Intake Gate

stage concreting and grouting after erection of gate guides as

specified hereinafter and in conformity with the drawings.

2. Trash racks for penstock

3. Gate for desilting tank

4. Trash rack for trench weir

5. Gate for head regulator


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20.2 Penstock Intake Gate

Vertical lift gate(s) with suitable clear opening(s) shall be 1.provided at the

intake of penstock in the forebay. The gates, shall normally be operated under

balanced head of water i.e. under no flow condition. It shall be designed to

safely. Withstand water pressure equal to maximum available head of water.

The gates shall be operated by a suitable manually operated mechanical hoist

either of screw type or of rope drums type. It shall be possible to operate this

gate by not more than two persons from the operating deck.

20.3 Trash racks

Trash racks shall be fabricated to conform to the design/drawings or as

directed by the Engineer-In-Charge. The materiel to be use for fabrication of

trash racks shall be of welded construction.

These trash racks, normally, would not need to be takeout and no hoisting

handling arrangements shall be provided for them except that suitable lifting

hooks etc, shall be provided to facilitate initial installation and occasional

removal for repairs and maintenance.

Special trash racks to be provided to take care of high silt inflow such as

Coanda type, or in freezing zones (plastic trash racks) will be provided when

formulating site specific specification.

20.4 Design Consideration

20.4.1 General

All gates and stop logs shall be designed in accordance with latest edition of

IS: 4622 The Thickness of skin plate shall not be than 5 mm.

All part of the gate and gate frames shall be robust in design, liberally

dimensioned and having best workmanship.

All bought-out items (vendor item) shall be products of reputed Contractors

and shall be purchased from a standards company .All such items shall have

ISI Certification Mark, wherever possible.


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20.4.2 Allowable Stresses

The following design stresses in Kg/cm2 shall be adopted in the design of members;

1. Bending in tension or compression 1050

2. Shear Stress 650

3. Combined Stress 1400

4. Weld Strength same as of original members

5 Weld stress (filled weld in shear) 665

Corrosion Allowance 1.5 mm

20.4.3 Balancing of Water Load on Gates/ slop logs

Before lifting penstock intake Gates after inspection and maintenance of the

Structure/equipment, water needs to be filled on the dry side in order to create

balanced head condition.

20.4.4 Stream Water Data

Stream water is generally clear but at times it can have turbidity of up to 5000

ppm. Specific gravity of water is 1.0 and ambient temperature varying

between +4 C and +35 C.

Water quality information is to be furnished in the tender documents for

information of the bidders to enable providing the most suitable arrangement.

20.5 Materials and Constructional Requirements.

20.5.1 Gate Leaf

The gate leaf (vertical lift gates and stop logs) shall be of structural steel

conforming to latest edition of IS: 2062 or IS: 226 and of welded construction.

It will be sufficiently rigid to withstand dynamic forces and vibrations arising

from high velocity flounder the gate. The skin plate shall generally be on the

downstream side. The design of gate lead shall conform to latest edition of IS:

4622.


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20.5.2 Gate Frame and Guides

The gate frame and guides embedded in concrete shall be of structural steel

conforming to latest edition of IS: 226 and of welded construction. The design

of gate frames and guides shall confirm to latest edition of IS: 4622. These will

have liberal number of anchor of bars of adequate sections so as to provide

good anchorage into concrete. If any 1st

stage embedment is required the same

shall be supplied with well in time. After erection and alignments of guides

etc., the same shall be concreted and grouted by the Contractor/ erector of the

equipment.

20.5.3 Seals

The side and top seals shall, be of rubber while bottom seal may be of rubber

or of metal (Brass or Bronze). The seals shall conform to the latest edition of

IS: 4622.

20.5.4 SealSeats

Seal seats shall be of metal preferably of brass/ bronze/ stainless steel

and shall conform to latest edition of IS: 4622.

20.5.5 Hoisting Mechanism

All the vertical lift gates shall be operated manually through screw-type-

hoist directly connected to the gate leaf, through semi-flexible connection at

the centre of gravity of the gate so that when the gate is lifted, it does not tilt in

any direction. The design of screw hoist shall be robust and conform to Indian

Standard Specifications.

The screw hoist shall be complete with frame fixed nut hand wheel directly

mounted on the screw stem or crank handle connected to the screw stem

through bevel gearing and all necessary accessories including foundation bolts

etc. required to complete the job.

If Rope Drum is provided for the operation of Penstock Intake Gate, all parts

i.e. Rope Drum, Hoist Rope, Rope sheaves, Gears, Pinions, Bearings, Shafts,


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Brakes, Keys and splines etc. shall conform to relevant Indian Standards. The

operation shall be by crank handle deploying not more than 2 persons.

Materials used for the manufacture of various components shall be as per

modem practice for such hoists.

The hoist mechanism shall be of good design using liberal factor of safety. All

bought-out (vendor) items shall be the products of reputed Contractor and shall

be procured from standard companies. All such items shall have ISI

Certification Mark, wherever possible.

Hoists shall be fully assembled in shop and tested under full load conditions in

the presence of Engineer-In-Charge.

20.5.6 Manufacture and Supply

After Contractor’s drawings, including manufacturing drawings and shop

drawings are duty approved by the Engineer-In-Charge, the Contractor shall

proceed with the manufacture of the same. The Indian Standards and codes on

materials, various components, sub-assemblies and assembled gate/hoist at the

place of manufacture and/or at the erection side.

20.6 Painting

20.6.1 Shop Painting

All metal surfaces, which are not in sliding/rolling contact and are not likely

to be accessible after erection, shall be given two coats of Red-oxide Primer.

All metal surfaces, which are not in sliding/rolling contact but are assemble

after erection, shall be given one coat of Red-oxide Primer. All metal to be

embedded must be primed.

All sliding/rolling surfaces shall be painted with renewable type anti-rust

compound/solution.


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20.6.2 Field Painting

All surfaces which are not in sliding/rolling contact shall be painted with two

costs of Epoxy paint of a colour to be approved by the Engineer-In-Charge.

Anti-rust compound/solution applied on sliding/rolling surfaces shall be

removed and proper grease/lubricant applied.

20.7 Erection and Testing

The gates, stoplogs and Hoists shall be erected by the contractor in a manner

that will ensure that all anchorages etc., are properly and firmly grouted and

that the gates operate without undue vibration and noise and to the entire

satisfaction of the Engineer-In-Charge.

Gates, stoplogs and hoists shall be treated as erected when the contractor

performs lifting and lowering of gates and stoplogs by operating hoits

mechanism firstly without water and then with water running in respective

water passages.

Trash racks shall be treated as erected when these are finally bolted in position

or grouted in concrete in accordance with relevant drawings.

20.8 Measurements and Payments

20.8.1 Trash racks

Trash racks shall be measured by sectional weight of the structure. In

calculating the weight, the weight involved in welding, drilled holes, and

bolts, nuts and washers etc. shall not be taken into account.

20.8.2 Gates, Stoplogs and Hoists

The measurement for gates, stoplogs and hoists shall be done separately for

each gate/stoplog in terms of a single job. It shall include complete

manufacture, supply, painting erection and testing.


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RECOMMENDED SPECIFICATIONS FOR MATERIALS

The materials and equipment used in the fabrication and erection of the penstocks

shall comply with the following specifications or their equivalents alongwith all their

upto date modifications.

S. No. Description of Material Specification

1 Steel plate for penstock IS: 2062-1992 (Weldable structural steel)/

IS: 2002-1992 Grade 2A

2. Structural Steel IS: 2062-1992

3. Forged and rolled steel for

general Engineer-In-Charging use

IS: 2004-1991

4. Bolts and nuts IS: 1363-1991, IS: 1364-1979

5. Studs IS: 1862-1975

6. Gaskets IS: 4870-1968, IS: 638-1979

7. Mild steel tubes for piezometer

system

IS: 1239 (Part I)-1990

8. Gasoline soluble rust preventive

compound

Best commercial quality???

9.

10.

Coal tar epoxy

Coal tar epoxy paint

Equivalent to British paints-Eplilux 4 as

primer and Eplilux 5 for coating

Best commercial quality ???

11. Flax packing Best commercial quality ???

12. Red lead priming paint IS: 102-1962

13. Ready mixed paint

IS: 2074-1992

14. Welding:

a) Electrodes (Covered) for

Manual metal arc welding of

carbon and carbon manganese

steel

IS: 814-1991 (to suit imported steel)


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b) Classification coding of

covered electrodes for metal are

1ding of structural steel

E-7018/IS-814-1991

Or

Equivalent

c) Code of practice for used of

Metal are welding for general

construction in mild steel

IS: 816-1969

d) Code of practice for training

and testing of metal are

welders

e) Code of practice for inspection

of welds.

IS: 816-1969

Where materials are indicated or required by these specifications but are not defend herein by

detailed specification, the Contractor shall furnish high-class commercial grades of materials

satisfactory to the Engineer-In-Charge.