1

Invitation for Bids (IFB)

High Commission of India

Grant Number: Col/Com/228/35/2010

Grant Name: Construction of 200 beds ward at General Hospital of Vavuniya

Bid No Description of Work

Estimated

Cost /(Rs

in

millions)

Contract

Period

Required

Grade

Col/Com/228/35/2010

Construction Of 200 Bed Ward Complex at G.H Vavuniya

197 18months C3

or above (Buildings)

1. Government of India has approved a grant for Construction of 200 beds ward at

General Hospital of Vavuniya and intends to apply part of the proceeds of this grant to payments under the Contract named above.

2. The Chief Secretary, Northern Province on behalf of the Government of India now invites sealed bids from eligible and qualified bidders for construction of the above

3. Bidding will be conducted through National Competitive Bidding Procedure – Single Stage – Two envelope bidding procedure.

4. To be eligible for contract award, the successful bidder shall not have been blacklisted and shall meet the requirements of ICTAD registration as above.

5. Qualification requirements are indicated in the Bidding document. Additional details are provided in the Bidding Data & Contract Data.

6. Interested bidders may obtain further information from Project Officer (Development Cooperation), High Commission of India, 36-38, Galle Road, Colombo-03 and inspect the bidding documents at the same place on any working days from 9.30 hrs to 1600 hrs.

7. A complete set of Bidding Documents in English language may be purchased by interested bidders from the Project Officer (Development Cooperation), High Commission of India, 36-38, Galle Road, Colombo-03 from 21st February 2012 to 13th March 2012 between 0930 hrs to 1600 hrs. upon payment of a non refundable fee of Rs.7,500.00. The payment should be made by cash.

8. Bids shall be delivered to the address below at registered post or by hand to the Project Officer (Development Cooperation), High Commission of India, 36-38, Galle Road, Colombo-03 on or before 13th March 2012 at 1500 hrs. Late bids will be rejected. Bids will be opened on the same day in the presence of the bidders’ representatives who choose to attend.

9. Pre Bid conference will be held at the High Commission of India, 36-38, Galle Road, Colombo-03 commencing at 1500 Hrs on 5th March 2012

10. All bids shall be accompanied by a Bid Security as in the Bidding Data.

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HIGH COMMISSION OF INDIA

Colombo

***

INSTRUCTIONS TO BIDDERS

CONDITION OF CONTRACT

Reference to Volume I of ICTAD publication No. SBD/02 Second Edition –

January 2007 for instruction to Bidders, Conditionof Contract etc.

This publication shall be available for purchase from Institute for

Construction, Training and Development (ICTAD) “Savsiripaya” 123,

Wijerama Mawatha, Colombo – 07.

FFFFFFFFFF ................................................

Bidder First Secretary (Development Cooperation)

High Commission of India

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Bidding Data Instructions to Bidders Clause Reference

1.11.11.11.1 Employer’s Name and Address

Name : High Commission of India, Colombo Address : 36-38 Galle Road, Colombo – 03.

1.11.11.11.1 Scope of Works

The works consists of Construction of 200 Bed Ward Complex at General Hospital Vavuniya.

Located at Vavuniya.

1.21.21.21.2 Time for Completion

The Time for Completion of the works shall be 18 Months.

2.12.12.12.1 Source of funds

The source of funds is Government of India.

4.14.14.14.1 Qualification Information

The following information shall be provided in Schedules :

• ICTAD registration

Registration number ………………………………… Grade ………………………………… Speciality …………………………………. Expiry date …………………………………

• VAT registration number ………………………………….

• Attach construction program

• Attach legal status (Sole proprietor, Partnership, Company etc)

• Attach authentication for signatory

• Attach audited financial reports for total monetary value of

construction work performed for each of the last five years

• Attach certificate of completion for experience in works of a

similar nature and size for each of the last five years

• Construction equipment

• Attach CV of proposed sites Staffing

• Attach Work plan and methods ;

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4.1 (c)4.1 (c)4.1 (c)4.1 (c) as per schedules

4.2 (a)4.2 (a)4.2 (a)4.2 (a) ICTAD registration required

The registration required; Specialty Buildings.

Grade C3

4.2(b)4.2(b)4.2(b)4.2(b) Average annual volume of construction work performed in last 5555 years

Average annual volume of construction work performed in last five years

shall be at least Rs. 200.00Mn. Submission of audited balance sheets or other financial statements to demonstrate the financial position is required.

4.2(d)4.2(d)4.2(d)4.2(d) Essential equipment

Proposals for the timely acquisition (own, lease, hire, etc) of the following essential equipment shall be;

Type Capacity

1. Concrete Mixer Min. 1m3 (03Nos.)

2. Lorry/Tipper/Tractor with Trailer (02Nos.)

3. Poker Vibrator (03Nos.)

4.2 (e) 4.2 (e) 4.2 (e) 4.2 (e) Qualifications and experience of the Contract Manager Following technical and managerial Staff :( minimum 10 years experience)

1. Engineer: i. BSc.Eng. (Civil) Qualified – 01 Nos.

ii. BSc.Eng. (Electrical/Mechanical) Qualified – 01

Nos

2. Technical : i. NCT Civil Qualified – 02 Nos.

or Equivalent

3. Managerial: i. Manager

ii. Store keeper – 01 Nos

4.2(f)4.2(f)4.2(f)4.2(f) Liquid assets and / or credit facilities required

The minimum amount of liquid assets and / or credit facilities, net of other contractual commitments and exclusive of any advance payments

which may be made under the Contract, shall be not less than Rs.

30.00Mn.

4.2(g) Experience in the construction of at least One contract of a similar nature and complexity (hospital building with three storied and cost of construction about Rs. 175.00 Mn) equivalent to this Works over the last 5 years (to comply with this requirement, works cited should be at least 70 percent completed and certificate of completion from the client/ consultant should be attached)

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10.110.110.110.1 Clarification of Bidding Documents Employer’s address for clarification of bidding documents is :

Name : Project Officer (Development Cooperation) Address : High Commission of India

36-38 Galle Road, Colombo – 03.

E-mail : projects.col.hci@gmail.com

11114.44.44.44.4 Adjustments for change in cost

The Contract is not subjected to price adjustment

16.116.116.116.1 Period of Bid validity:

The Bid shall be valid up to 26.07.2012.

17.117.117.117.1 Amount of Bid security:

The amount of Bid Security is Sri Lanka Rupees: One million seven hundred and fifty thousand (LKR 1,750,000.00) Issued by an agency acceptable to Employer using

the form for bid security (unconditional guarantee) included in Standard Forms.

The Bid Securities issued by the following agencies are acceptable provided the Bid Security is furnished without a critical departure to the format given in this bid document with respect to the amount, validity and payment of guaranteed amount upon receipt of first demand in writing.

• A bank operating in Sri Lanka approved by the Central Bank.

• Construction Guarantee Fund.

17.217.217.217.2 Validity of Bid Security

The Bid Security shall be valid up to 30.07.2012.

19.119.119.119.1 Pre-Bid meeting

Date : 05.03.2012.

Time : 1500 Hrs

Venue : Conference Hall, High Commission of India, 36-38 Galle Road, Colombo – 03.

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21.2(a)21.2(a)21.2(a)21.2(a) Address for Bid submission

Address for the purpose of bid submission is: Project Officer (Development Cooperation)

High Commission of India, 36-38 Galle Road, Colombo – 03.

21.2 (b)21.2 (b)21.2 (b)21.2 (b) Identification number of Contract

Identification Number of the Contract is: Col/Com/228/35/2010

22.122.122.122.1 Deadline for submission of Bids

Deadline for submission of Bids on 13.03.2012, 15.00 Hrs

25.125.125.125.1 Bid opening

Venue, time, and date of bid opening: High Commission of India, 36-38 Galle Road, Colombo – 03

13.03.2012 at 15.00 Hrs

31.131.131.131.1 Not Applicable

32323232 If the Procurement is within the authority limit of a CAPC :

After evaluation of Bids in accordance with the procedures described

under Clauses 28, 29, 30 and 31, the Employer will inform to all the bidders in writing the selection of the successful bidder and the intention of contract award to such bidder. The unsuccessful bidders if they so wish, within one week of such notice may make representation to the Procurement Appeal Board at the address given below. Such representation shall be self-contained to enable the Appeal Board to arrive at a conclusion and a cash deposit to amount given below shall be made. The appeal Board may request the bidder who had made representation to submit further evidence during the investigations. The cash deposit will be forfeited unless the Employer has changed the original contract award decision in favour of the bidder who has made such representation.

Address : High Commission of India, 36-38 Galle Road, Colombo – 03

Cash Deposit : Rupees 50,000/=

35.135.135.135.1 Amount of Performance Security

The Standard Form of Performance Security acceptable to the employer. The amount of Performance Security is 5% of the Initial Contract Price and shall be valid up to 28 days beyond the end of defects liability period. Performance security shall be unconditional bank guarantee.

37373737 Fees and types of reimbursable expenses to be paid to the Adjudicator shall be on a case to case basis and shall be shared equally by the Contractor and the Employer.

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Contract Data Conditions of Contract Clause Number/s

1.1.2.2 & 1.3 Employer’s name Name : High Commission of India,

and address Address : 36-38 Galle Road, Colombo– 03

1.3 Contractor’s name Name : ………………………………… and address Address : ………………………………...

1.1.2.4 & 1.3 Engineer’s name Name : Provincial Director and address Address : Department of Buildings, Northern Province,

No.40 Racka lane, Jaffna.

1.1.3.3 Time for Time for Completion is 18 Months. Completion of the Works

1.1.3.7 Defects Defects Notification Period is 365 Days Notification Period

2.1 Right to access to 14 Days from Letter of Acceptance the site

4.2 Amount of Security The Performance Security shall be 5% of the

Initial Contract Price and shall valid till the end of defects liability period plus 28days. Performance security shall be unconditional bank guarantee.

8.7 Liquidated damages 0.05% of the Initial Contract Price per Day for the Works

8.7 Maximum amount 10% of the Initial Contract Price of liquidated damages

12.2(b) Method of The Method of Measurement shall

Measurement be given in the Sri Lanka Standard 573(1st Revision 1999), Method of Measurement of

Building Works shall be acceptable

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13.4(b) Percentage for 10% (of actual amount) adjustment of Provisional Sums

13.7 Weightings of Not applicable Inputs

14.2 Total Advance 20% of the Initial Contract Price excluding Payment provisional sums and contingencies against

Bank guarantee

14.2 Number and timing 01 installment of installments

14.3(c) Percentage of 10%

retention

14.3( c) Limit of Retention 05% of the Initial Contract Price Money

14.5 Minimum amount Rs.29,000,000.00 of Interim Payment Certificates

14.8 Alternative method As an alternative upon the issue of for Payment of the certificate of completion the contractor

Retention may submit an unconditional, on demand guarantee acceptable to the Employer to a value equal to the second half of the

retention money, and valid up to 28 days beyond the end of Defect Notification Period. On receipt of such guarantee the Employer shall repay the second half of the retention money

18.2 Third Party This amount of insurance per occurrence is :

Insurance Rupees 500,000.00

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FORM OF BID

Name of Contract: Construction of 200 beds ward at General Hospital of Vavuniya To: High Commission of India 36-38, Galle Road, Colombo-03 Gentleman,

1. Having examined the Standard Bidding Document - Procurement of Works [ICTAD/ SBD/ 02 - Second Edition, January 2007], Specifications, Drawings and Bills of Quantities and addenda for the execution of the above-named Works, we the undersigned, offer to execute and complete such Works and remedy any defect therein in conformity with the aforesaid Conditions of Contract, Specifications, Drawings, Bill of Quantities and Addenda for the sum of Sri Lankan Rupees .............................. ..... (LKR ..................) or such other sums as may be ascertained in accordance with the said Conditions.

2. We acknowledge that the Contract Data forms part of our Bid.

3. We undertake, if our Bid is accepted, to commence the Works as stipulated in the Contract Data, and to complete the whole of the Works comprised in the Contract within the time stated in the Contract Data.

4. We agree to abide by this Bid until the date specified in ITB Clause 16 *FFFFFFFFFFFFFFFFF (insert date) and it shall remain binding upon us and may be accepted at any time before that date.

5. Unless and until a formal agreement is prepared and executed this Bid, together with your written acceptance thereof, shall constitute a binding contract between us.

6. We understand that you are not bound to accept the lowest or any Bid you may

receive. 7. We certify/confirm that we comply with the eligibility requirements as per ITB Clause 3

of the bidding document.

Dated this .......... day of ......... 20..... in the capacity of ......................... duly authorized

to sign

tenders for and on behalf of .............................................................. (IN BLOCK CAPITALS) Signature : ....................................................

Address : .............................................................................................................. Witness : ....................................................

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FORM OF AGREEMENT

This AGREEMENT, made the FFF.. [day] of FFFFF [month] 20F.. [year], between FF.. FFF..............FFFFFFFF..[name and address of Employer] (hereinafter called and referred to as “the Employer”), of the one part, and FFFFFFFFFFFFFFF......F.. [name and address of Contractor] (hereinafter called “the Contractor”), of the other part:

WHEREAS the Employer desires that the Contractor execute FFF............FFFFFFFF [name and identification no of Contract]( hereinafter called “the Works”) and the Employer has accepted the Bid by the Contractor for the execution and completion of such Works and remedying of any defects therein.

NOW THIS AGREEMENT WITNESSETH as follows:

1. In this Agreement words and expressions shall have the same meanings as are respectively assigned to them in the Contract

2. In consideration of the payments to be made by the Employer to the Contractor as indicated in this agreement, the Contractor hereby covenants with the Employer to execute and complete the Works and remedy any defects therein in conformity in all respects with the provisions of the Contract.

3. The Employer hereby covenants to pay the Contractor in consideration of the execution and completion of the Works and the remedying of defects wherein, the Contract Price or such other sum as may become payable under the provisions of the Contract at the times and in the manner prescribed by the Contract.

In Witness whereof the parties thereto have caused this Agreement to be executed the day and year aforementioned, in accordance with laws of Sri Lanka.

FFFFFFFFFFFFFFF. FFFFFFFFFFFFFFF.

Authorized signature of Contractor Authorized signature of Employer

COMMON SEAL COMMON SEAL In the presence of: Witnesses : 1. Name and NIC No. FFFFFFFFFFFFFFFFFF

Signature FFFFFFFFFF

Address FFFFFFFFFFFFFFFFFFFFFF..

2. Name and NIC No. FFFFFFFFFFFFFFFFFF

Signature FFFFFFFFFF

Address FFFFFFFFFFFFFFFFFFFFFF.

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FORM OF PERFORMANCE SECURITY (UNCONDITIONAL)

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

[Issuing Agency's Name, and Address of Issuing Branch or Office}

Beneficiary:-----------------------------------------------------------------------------------------------------

[Name and Address of Employer]

Date: ------------------------------

PERFORMANCE GUARANTEE No.: -------------------------

We have been informed that ------------------------------------------------------------------- [name of

Contractor]

(hereinafter called, "the Contractor") has entered into Contract No. --------------------------------

[reference

number of the contract] dated ------------------ with you, for the------------------------ [insert

“construction”]

of ---------------------------------------------------------------- [name of contract and brief description

of Works] (hereinafter called “the Contract”]

Furthermore, we understand that, according to the conditions of the Contract, a

performance guarantee

is required.

At the request of the Contractor, we ----------------------------------------------------- [name of

Agency] hereby irrevocably undertake to pay you any sum or sums not exceeding in total

an amount of ----------------------------- [amount in figures]

(---------------------------------------------------------------------------------------) [amount in words],

upon receipt by us of your first demand in writing accompanied by a written statement

stating that the Contractor is in breach of its obligation(s) under the Contract, without your

needing to prove or to show grounds for your demand or the sum specified therein .

This guarantee shall expire, no later than the ...... day of -------- 20---- [insert date, 28 days beyond the Intended Completion Date} and any demand for payment under it must be received by us at this office on or before that date.

[signature(s)]

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FORM OF RETENTION MONEY GUARANTEE

-----------------------------------------------------------------------------------------------------------[Issuing

Agency’s Name, and Address of Issuing Branch or Office]

Beneficiary: --------------------------------------------------------------------------------------- [Name and

Address of Employer]

Date: ---------------------

RETENTION MONEY GUARANTEE No.: -----------------------------------------------------------

We have been informed that--------------------------------------------------------------------- [name of

Contractor]

(hereinafter called "the Contractor") has entered into Contract No.

------------------------------------- [reference number of the contract} dated ------------------ with

you, for the execution of----------------------------------------- [name of contract and brief

description of Works} (hereinafter called "the Contract").

Furthermore, we understand that, according to the conditions of the Contract when the

works have being taken over and the first half of the Retention Money has been certified for

payment, payment of the second half of the Retention Money may be made against a

Retention Money guarantee.

At the request of the Contractor, we ------------------------------------------------------------- [name

of agency] hereby irrevocably, undertake to pay you any sum or sums not exceeding in

total an amount of ------------------------------------------ [amount in

figures](----------------------------------------------------------------------) [amount in words] 5 Upon

receipt by us of your first demand in writing accompanied by a written statement stating

that the Contractor is in breach of its obligation under the Contract because the Contractor

has not attended to the defects in accordance with the contract.

This guarantee shall expire, at the latest, -------------------------------[insert 28 Days after the

end of the

Defects Liability Period] Consequently, any demand for payment under this guarantee

must be

received by us at this office on or before that date.

[Signature (s)]

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FORM OF LETTER OF ACCEPTANCE [Letter heading paper of the procuring entity]

FFFFF............FFFF. [date] To: ------------------------------------------------------------------------------------------------------------- [name and address of the Contractor] This is to notify you that your bid dated ----------- [insert date] for the construction and remedying defects of the ----------------------------- [name of the Contract and identification number] for the Contract price of --------------------------------[name of currency]----------------------------------[amount in figures and words] as corrected in accordance with Instructions to Bidders and/ or modified by a Memorandum of Understanding , is hereby accepted.

The adjudicator shall be -------------------------------------------------------------------- [name and address of the Adjudicator, if agreed] / shall be appointed by the Institute for Construction Training and Development (ICTAD).

You are hereby instructed to proceed with the execution of the said Works in accordance with the Contract documents.

The Start Date shall be: FFFFFF (fill the date as per Conditions of Contract).

The amount of Performance Security is : FFFFF (fill as per Conditions of Contract).

The Performance Security shall be submitted on or before ========... (fill the date as per Clause 4.4 of Conditions of Contract).

Authorized Signature : FFFFFFFFFFFFFF Name and title of Signatory : ========================.

Name of Agency : FFFFFFFFFFFFFFFFFFFFFFF..

Notes on Form of Letter of Acceptance The Letter of Acceptance will be the basis for formation of the Contract as described in Clause 33 of the Instructions to Bidders. This Form of Letter of Acceptance should be filled in and sent to the successful bidder only after evaluation of Bids and after obtaining approval from the relevant authority.

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Form of advance payment security

-------------------------------------------------------------------------------------------- [Name and address of Agency and Address of Issuing Branch or Office] Beneficiary: -------------------------------------------------------------------- [Name and address of

Employer]

Date: ---------------------------

ADVANCE PAYMENT GUARANTEE No.: ------------------------------

We have been informed that --------------------------------------------------------------------------

[name of Contractor]

(hereinafter called "the Contractor") has entered into Contract No.

------------------------------------------ [reference number of the contract] dated ----------------------

with you, for the --------------------------------------------------------- construction of

--------------------------------------------------------------- [name of contract and brief description]

(hereinafter called "the Contract").

Furthermore, we understand that, according to the conditions of the Contract, an advance

payment in the sum ----------------------- [amount in figures]

(-------------------------------------------------------------------) [amount in words] is to be made

against an advance payment guarantee.

At the request of the Contractor, we -------------------------------------- [name of issuing agency]

hereby irrevocably undertake to pay you any sum or sums not exceeding in total an amount

of------------------------------------------[amount in figure](----------------------------------) [amount in

words]4 upon receipt by us of your first demand in writing accompanied by a written

statement stating that the Contractor is in breach of its obligation in repayment of the

Advance payment under the Contract.

The maximum amount of this guarantee shall be progressively reduced by the amount of

the advance payment repaid by the Contractor.

The guarantee shall expire on ---------------------------------- [Insert the date, 28 days beyond

Intended Completion Date]

Consequently, any demand for payment under this guarantee must be received by us at

this office on or before that date.

[Signature (s)]

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FORM OF BID SECURITY

[this Guarantee form shall be filled in accordance with the instructions indicated in brackets] --------------------------------------------------------------------------------------------------------- [insert issuing agency’s name, and address of issuing branch or office] Beneficiary: ------------------------------------------------------------------------------------------------------ [insert (by PE) name and address of Employer] Date: -------------------------------- [insert (by issuing agency) date]

BID GUARANTEE No.: -------------------------------- [insert (by issuing agency) number] We have been informed that ------------------------------------------------------------------ [insert (by issuing agency) name of the bidder] (hereinafter called "the Bidder") has submitted to you its bid dated ------------ [insert (by issuing agency) date](hereinafter called "the Bid") for the execution of [insert name of Contract] under Invitation for Bids No. ----------- [insert IFB number] (“the IFB”).

Furthermore, we understand that, according to your conditions, Bids must be supported by a Bid Guarantee.

At the request of the bidder, we --------------------------------------------------------------------- [insert name of issuing agency] hereby irrevocably undertake to pay you any sum or sums not exceeding in total an amount of ------------ [insert amount in figures] ----------------------------------------------- [insert amount in words]) upon receipt by us of your first demand in writing accompanied by a written statement stating that the Bidder is in breach of its obligation(s) under the bid conditions, because the Bidder:

(a) has withdrawn its Bid during the period of bid validity specified; or

(b) does not accept the correction of errors in accordance with the Instructions to Bidders (hereinafter “the ITB”); or

(c) having been notified of the acceptance of its Bid by the Employer during the period of bid validity, (i) fails or refuses to execute the Contract Form, if required, or (ii) fails or refuses to furnish the Performance Security, in accordance with the ITB.

This Guarantee shall expire: (a) if the bidder is the successful bidder, upon our receipt of copies of the Contract signed by the Bidder and of the Performance Security issued to you by the bidder; or (b) if the Bidder is not the successful bidder, upon the earlier of (i) the successful bidder furnishing the performance security, otherwise it will remain in force up to --------------- (insert date) Consequently, any demand for payment under this Guarantee must be received by us at the office on or before that date.

_____________________________________ [signature(s) of authorized representative(s)]

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SPECIFICATIONS (GENERAL)

The Works under this Contract shall be executed in accordance with the Specifications given in the

following documents issued by the Institute for Construction Training and Development (ICTAD),

“Savsiripaya”, Wijerama Mawatha, Colombo 07.

Publication No.: Description: SCA/4(Vol. I) Specifications for Building Works, Vol. (I), Sri Lanka. 3

rd Edition (Revised), July 2004.

SCA/4(Vol. II) Specifications for Building Works Vol.(II), Sri Lanka. 2nd Edition (Revised), October 2001. SCA/3/2 Specifications for Water Supply Sewerage and Storm Water Drainage Works, Sri Lanka. Second Edition (Revised), April 2002.

It is implied that the eligible Bidders are fully acquainted with the above documents and therefore, those will not be issued to the Bidders in this Bid. However, the Bidders may purchase the same if necessary from ICTAD. “Savsiripaya”, Wijerama Mawatha, Colombo 07.

Separate and exclusive specifications for the following areas of works are provided next.

(i) Specification for Aluminium Work (ii) Specification for Floor Tiling and Wall Tiling. (iii) Specification for Electrical works. (iv) Specification for Mechanical works.

These Specifications shall be applicable to the respective area of work not withstanding if anything to the contrary is contained in any other specification referred to in the Bidding Document .

However, the Bidders may purchase the same if necessary from ICTAD. “Savsiripaya”, Wijerama Mawatha, Colombo 07. Further to above, Bidders should follow the specifications given below under this contract.

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PARTICULAR SPECIFICATION FOR THE PROPOSED BUILDING

GENERAL REQUIREMENTS

1.0 GENERAL This specification shall be read in conjunction with the other documents which form the

Contract Agreement for the Works. Notwithstanding the subdivision of the specification under different headings each and every part of it shall be deemed supplementary to and complementary every other part thereof. All materials and workmanship shall be in accordance with the appropriate current Sri Lankan Standards or where such standards are not available the relevant British Standards shall be applicable. Where such standards are in conflict with this specification the interpretation in accordance to this specification shall prevail.

1.1 Equivalency of Standards and Codes

Wherever reference is made in the Contract to specific standards and codes to be met by the

goods and materials to be furnished, and work performed or tested, the provisions of the latest

current edition or revision of the relevant standards and codes in effect shall apply, unless

otherwise expressly stated in the Contract. Where such standards and codes are national, or

relate to a particular country or region, other authoritative standards that ensure a

substantially equal or higher quality than the standards and codes specified will be accepted

subject to the Engineer’s prior review and written consent. Differences between the

standards specified and the proposed alternative standards shall be fully described in writing

by the Contractor and submitted to the Engineer at least 14 days prior to the date when the

Contractor desires the Engineer’s consent. In the event the Engineer determines that such

proposed deviations do not ensure substantially equal or higher quality, the Contractor shall

comply with the standards specified in the documents.

1.2 Definitions

In this specification the terms ‘approved’, ‘approval’ and ‘required’ mean ‘approved by the

Engineer’, ‘approval of the Engineer’ and ‘required by the Engineer’ respectively. 1.3 Scope of Work The works to be executed under this Contract comprise the following. (a) The provision at site of all necessary labour, materials plant & equipment, tools

instruments etc. together with personnel of all types of skills for the mobilization execution with supervision demobilization and removal of plant tools etc. and other resources provided by the Contractor there from.

(b) The execution of all necessary surveys for the setting out of building and for

required completion of works. (c) The maintenance of proper site records, preparation and submission of

calculations. Drawings progress reports etc. to the Engineer as required under this Contract Agreement.

(d) Complete the construction works including all temporary works in accordance to

the requirements under this Contract Agreement and as required by the Engineer. (e) The testing of required tests in accordance to the specifications therein and as

directed by the Engineer. (f) All other works associated with the above for the completion of the Works as

specified in contract. 1.4 Site Security

The Contractor shall provide all necessary fencing, hoardings, watching and lighting for the

security of site and safeguarding the Works. The shelters, guard house and other facilities to be provided for the watchmen to do their duty in an efficient manner. Altering,

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shifting and adapting same from time to time shall also be the responsibilities of the Contractor.

1.5 Advertisement

The Contractor shall allow no advertisement to be placed on any hoarding, scaffolding or

fencing erected in connection with the Works without the permission of the Engineer. 1.6 Temporary Works The Contractor shall submit to the Engineer details, particulars, drawings etc., of all

temporary works necessary for the Works for latter’s information. The Engineer reserves the right to call for technical justification of the Contractor’s proposals and to order any necessary modifications. But the Contractor shall be solely responsible for the stability and safety of all temporary works and for the quality of the permanent works resulting from the Temporary Works eventually adopted.

1.7 Programming of the Works 1.7.1 Master Programming and Records The Contractor shall furnish in duplicate to the Engineer the Programme and particulars

called for in Clause 25.1 Conditions of Contract. The Programme shall be in the form of a critical path network with explanatory notes, capable of being monitored and updated continuously during the progress of the Contract. The Programme shall show inter-alia.

• The dates of possession and the completion named in the PCC.

• The date as determined or proposed for procurement, delivery to site of materials, commencement and completion of erection or installation of work in all trades, and the labour force involved.

• The dates by which the Contractor requires in information from the Engineer.

The critical path network, or other similar network, shall describe major plant allocations and requirements and major site operations.

Each in every two month throughout the construction period the Contractor shall submit to

the Engineer further copies of the Programme marked up to show the progress to date, together with any revision of the Programmes. These shall be submitted one week before the site progress meetings.

In the event of the Contractor failing to prepare and complete the Critical Path Network and

Works Programme as described above within two weeks of the award of this Contract or such extended time as approved by the Engineer. The Engineer will appoint a Programming Consultant of his choice to assist the Contractor in preparing them and the Contractor will be obliged to settle all payments agreed between the Contractor and the said Programming Consultant.

1.7.2 Daily Returns The Contractor shall supply by 12 noon on every working day the following daily returns as

may be required by the Engineer. A list of the labour employed on the previous day specifying the number employed in each

trade including expatriate labour (summary of labour and Plant required weekly). Particulars of all materials and goods delivered off-site and on-site. 1.7.3 Progress Report The Contractor shall submit to the Engineer not later than the 4

th day of every month,

(Starting from 2nd

month from date of commencement)of the a Progress Report for the previous month which shall include the following items and information.

The marked Programme submitted at the previous Site Progress Meeting amended (if necessary) to indicate agreed revisions.

Weather conditions (daily rainfall, temperature, humidity, etc.)

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Summary of construction plant on-site and off-site including dates of arrival and departure

of items. Summary of principal materials and manufacturers items placed on order and delivered to

the site. 1.7.4 Construction Programme and Method of Working The following shall be considered in preparing the Programme and Master Programme and

revisions, high water table shall be considered. Failure to consider the above implications, which are neither necessarily in the given order

of priority, nor to be considered as complete, shall not entitle the Contractor to claim for additional time or extra costs whatsoever.

1.8 Temporary Services

The Contractor shall provide and maintain temporary services necessary for the execution

of the Works under the Contract shall make applications and install such services in accordance with the regulations and requirements of the relevant authorities.

The Contractor shall be responsible for all costs and charges in connection with the

installation, alteration, shifting, adopting use and maintenance of such services. On completion of the Works, the Contractor shall disconnect such service, which are no longer required by him and or the Employer and clear away all traces.

(a) Power The Contractor shall apply and pay for the required power and install temporary

electrical installation for the Works, Site Office, Engineer’s and Consultants Offices, Stores, Labour Huts, Yards and Site lighting and testing for mechanical and electrical services done by others.

A stand-by generator, with adequate capacity should be made available by the

Contractor at the site for use in an emergency, if any intention to work during night time and or during power failures. The cost of supplying, installing, running and maintaining of the stand-by generator shall be borne by the Contractor.

(b) Water The Contractor shall apply and pay for the continuation of temporary water supply

connection to the site and construct storage tanks with adequate capacity, together with the necessary internal temporary PVC distribution system including an overhead tank at an adequate elevation, water pumps as may be required and providing taps, valves, etc. in order to provide water for the Works, for drinking purposes, and also for washing, bathing and sanitary facilities required by the Contractor’s workmen, the Employer, the Engineer’s staff.

Water Bowsers with adequate capacity should be made available in order to bring

water to the site from outside and to pump into the storage tanks in an emergency and/or during water cuts and all costs in connection therewith shall be borne by the Contractor.

1.9 Equipments If Engineer needs to set the Telephone calls, Photocopies & Printing of Documents related

to contract. The contractor shall provide such services cost should be borne by the contractor.

1.10 Flammable stores

All petroleum, explosives and flammable materials shall be stored in fireproof buildings and

such precautions taken with regard to sitting and fire risks as the Engineer may direct. The Contractor shall make all arrangements with the licensing authority for the necessary

20

license. 1.11 Safety on Site Safety precautions throughout the construction operations shall comply with all relevant

state statute, ordinance, decree, or other law or decree or any regulation or bye law of any local or duly constituted authority applicable within the country at that time.

The Contractor shall provide and maintain the following safety measures in accordance

with the regulations and requirements stipulated by the relevant Statutory Authorities. i. Safe working conditions ii. Safe means of access and exit iii. Safety systems for Plant, Machinery and Equipment iv. Appropriate safety equipment required at the site and yards such as Helmets, Gum

Boots, Masks, Welding Masks, Safety Belts, etc. to the workmen and others engaged in the Works.

v. Safety nets, safety canopies, safety signs, handrails, guardrails, platforms and other measures ensuring safety of workmen and others engaged in the Works.

vi. Training, instructions, information and supervision as may be required to enable employees to avoid any potential dangers and hazards.

vii. All measures ensuring the health and workmen including satisfactory welfare facilities, working conditions and environment.

Safety signs should be in the Sinhala, Tamil and English languages. 1.12 Sources of supply

The Contractor shall have obtained from the Engineer approval of sources of supply of his

materials and shall not change his sources without prior approval.

All material that shall be rejected shall be promptly removed from site. 1.13 Soil Conditions

1.13.1 Unexpected ground conditions

The Contractor shall report immediately to the Engineer any circumstance which indicates

that in the Contractor’s opinion the ground conditions differ from those expected by him from his interpretation of the site investigation reports.

1.14 Setting out All the dimensions given in the drawings should be checked at the site by the Contractor

prior to commencing all work. In the event of any discrepancies the Contractor shall inform the Engineer and request well in advance and prior to commencing work. Setting out shall be carried out from the main grid lines of the proposed structure. The Contractor shall employ a suitable responsible officer for site setting out works in accordance with the drawings.

The Contractor shall set out and check all column centers and floor levels and carry out

such other surveys as may be necessary to establish accurately the placing of forms and all other basic structural works and setting out in both vertical and longitudinal directions. All survey marks and pegs shall be clearly identifiable with accurate records kept onsite by the Contractor that must be related to Bench Marks. In this regard Contractor must maintain accurate survey instruments at the sites all times for any checking of level that the Engineer or his representative may desire.

1.15 Records The Contractor shall keep records, in a format approved by the Engineer giving such

information that is required by the Engineer. For placing of concrete and shall submit two copies of these records to the Engineer not later than by noon of the next working day after the concreting for placing of borrow material.

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1.16 Nuisance and Damage 1.16.1 Noise and disturbance The Contractor shall carry out the work in such a manner and at such times as to minimize

noise and disturbance to adjacent owners tenants, the public, etc. 1.16.2 Damage to adjacent structures and roadways If during the execution of the work damage is, or is likely to be, caused to existing roadways,

mains, services or adjacent structures due to the Contractors operation they shall be made good to the approval of the Engineer or the authorities concerned. All costs in connection therewith shall be borne by the Contractor.

2. CONCRETE

2.1 General Requirements All material shall be in accordance with the standards stated in Clause 1.1 of this

specification. It is deemed that the Contractor has allowed for all charges for obtaining materials in conformance to these standards in the Bills of Quantities.

2.2 Cement 2.2.1 Type of cement Cement shall be ordinary Portland complying with the relevant local or BS standards.

When forwarding his concreting method and programme to the Engineer, the Contractor shall submit for approval the type of cement, other than ordinary Portland cement, -where such use is specified -the Contractor proposes to use.

2.2.2 Storage of cement All cement shall be stored in separate containers according to type in substantially built

waterproof stores or silos. 2.3 Aggregates 2.3.1 Types of aggregate Aggregates shall consist of naturally occurring material unless otherwise specified or

ordered. The Contractor shall inform the Engineer of the source of supply of the aggregates before the commencement of work and, at the request of the Engineer, provide evidence regarding their properties and consistency.

The content of chloride salt in the aggregate used in steel reinforced concrete work,

expressed as the equivalent anhydrous calcium chloride percentage by weight of the cement to be used in the concrete, shall not exceed 1%.

2.3.2 Storage of aggregates

All aggregates brought to the Site shall be free and kept free from deleterious matter.

Aggregates of different types and sizes shall be stored separately in different hoppers or different stockpiles.

2.4 Water 2.4.1 Availability

Client will not provide water. If water for the Works is not available from a public

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supply, approval shall be obtained regarding the source of water. 2.4.2 Tests When required by the Engineer, the Contractor shall arrange for tests of the water for the

works to be carried out in accordance with the relevant local standards or BS 3148 before and during the progress of the work.

2.5 Admixtures

Admixtures may be used if approved and shall be used only when so required. 2.6 Concrete Mixes 2.6.1 Grade designation Grades of concrete shall be denoted by the characteristic 28 day test cube strength in

Newton per square millimeter (N/mm2).

2.6.2 Mix

Concrete mix shall be in accordance with clause 2.6.3 (designed mix) or clause 2.6.4 (prescribed mix) and of grades 20, 25 or 30 of CP 110 or other grades approved appropriate to the work.

The Contractor shall submit the slump factor he proposes for approval before work commences. Neither trial mixes nor strength tests are required for prescribed mixes.

The concrete shall have sufficient workability to enable it to be placed and compacted by the methods used in.

2.6.3 Designed mix

Where it is required to use a designed mix or its use is specified the Contractor shall be responsible for selecting the mix proportions to achieve the required strength and workability.

The Contractor shall in his design mix meet the requirements for the minimum cement content and other properties the Engineer may require to ensure durability etc.

Designed mixes shall be in accordance with grades 20, 25 or 30 of CP 110 or other grades approved appropriate to the work. Complete information on the mix and sources of aggregate for each grade of concrete and the water/cement ratio and the proposed degree of workability shall be approved before work commences.

2.6.4 Prescribed Mix

When a prescribed mix is specified the Engineer will specify the mix proportions and the Contractor shall undertake to provide a properly mixed concrete

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containing the constituents in the specified proportions. The information given in Tables 1 & 2 is for preliminary tests in determining the correct proportions of the various constituent materials of the final mix acceptable for concreting. Table 1 is applicable to concrete which can be compacted in position by the use of Poker vibrators or by other approved methods. Table 2, based on the use of gravel aggregates, is applicable to concrete for use, where high workability is essential and where the use of internal vibrators is precluded.

Table 1. Prescribed mixed for Concreting

Concrete grade

Nominal maximum size of aggregate, mm

40 20

Workability Medium High Medium High Slump limits, mm 50-100 100-150 25-75 75-125

20 Cement, kg/m3 Total aggregate, kg/m3

Sand/total aggregate

300 1850 35%

320 1750 40%

320 1800 40%

350 1750 45%

25 Cement, kg/m3 Total aggregate, kg/m3

Sand/total aggregate :

340 1800 35%

360 1750 40%

360 1750 40%

390 1700 45%

Note: for use with natural sand as aggregate, if crushed rock type aggregate is used instead of

natural sand the amounts given in the above table requires adjustment. 2. 6.5 Sulphate attack

For concrete in exposed to sulphate attack the requirements of Building Research Establishment Digest 174 shall be observed.

2. 6.6 Minimum cement content The cement content in any mix shall be not less than 300 kg/m3.

Where concrete is to be placed under water, the cement content shall be not less than 400 kg/m3. 2. 6.7 Maximum cement content The cement content in any mix shall not exceed 550 kg/m3. Table 2 Prescribed mixed for cast in place for structural components using only gravel

aggregates of nominal maximum size 20 mm.

Concrete

grade

Nominal maximum

size of aggregate, mm

A B C

Slump limits, mm 75-125 100-175 150 or over

20 Cement, kg/m3

Total aggregate, kg/m3

Sand/total aggregate

320

1840

32%

350

1790

35%

400

1740

35%

24

25 Cement, kg/m3

Total aggregate, kg/m3

Sand/total aggregate

360

1790

32%

400

1740

35%

460

1680

35% 2.7 Trial Mixes 2.7.1 General

When designed mixes are specified trial mixes shall be prepared for each grade of concrete in accordance with the relevant local standard or BS 1881, unless there are existing data showing that the proposed mix proportions and manufacture will produce a concrete of the strength and quality required having adequate workability for compaction by the method to be used in placing.

2.7.2 Preliminary trial mixes

When required in accordance with clause 2.7.1 the Contractor shall, before the commencement of concreting, have preliminary trial mixes prepared, preferably under full-scale production conditions or, if this is not possible, in an approved laboratory using a sufficient number of samples to be representative of the aggregates and cement to be used. Unless otherwise approved for each grade of concrete a set of six cubes shall be made from each of three batches in accordance with clause 6.5.3 of CP 110. From each set of six cubes three shall be tested at an age of 7 days and three at 29 days.

This procedure shall be followed when accelerated testing is proposed for works cubes, but an additional three cubes from each batch shall be made, cured and tested in accordance with the accelerated regime.

2. 7.3 Trial mixes during the work

Where a trial mix is required after commencement of the work the procedure in clause 2.7.2 shall be adopted for full-scale production conditions as approved. The strength requirement shall be as in clause 2. 7.5.

2.7.4 Workability

The workability of each batch of the trial mixes shall be determined by the slump test as described in BS 1881 or by an alternative approved method.

2.7.5 Standard of acceptance

Unless otherwise approved, the trial mix proportions will be approved if the criteria in clause 6.5.3, in BS 1881 or by an alternative approved method.

2.7.6 Variations in approved mix

When a mix has been approved, no variations shall be made in the proportions, the original source of the cement and aggregates or their type, size or grading zone without the consent of the Engineer.

2.8. Testing works concrete 2.8.1 Sampling Concrete shall be sampled in accordance with BS 1881. 2.8.2 Workability The workability of concrete shall be determined by the slump test as described in BS 1881

or by an alternative approved method. 2.8.3 Works cube tests

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For each grade of concrete four cubes shall be made from a single batch when required for

each 15 m3 of concrete of part thereof in each day’s work. The cubes shall be made,

cured and tested in accordance with BS 1881 or as otherwise approved. One shall be tested an age of 7 days and the other three at 28 days. Alternatively cubes may be tested in accordance with an approved accelerated testing regime. The Contractor shall submit certified copies of the results of all tests to the Engineer.

2.8.4 Standard of acceptance The standard of acceptance of the works cubes shall be in accordance with clause 6.8.2.2

of CP 110 or as otherwise approved. Where the scale and duration of the Contract is small the Contractor shall submit for approval an alternative standard of acceptance before commencement of work.

2.8.5 Records of tests The Contractor shall keep a detailed record of the results of all tests on concrete and

concrete materials. Each test shall be clearly identified with the locations to which it relates.

2.9 Batching of Concrete 2.9.1 General Unless otherwise specified the requirements in clauses 2.9.2, 2.9.3 and 2.9.4 shall be met. 2.9.2 Accuracy of weighing and measuring equipment

The weighing and water-dispensing mechanism shall be maintained at all times to within the limits of accuracy described in BS 1305.

2. 9.3 Tolerance in weights

The weights of the quantities of each size of aggregate and of cement shall be within a tolerance of 2% of the respective weights per batch after due allowance has been made for the presence of free water in the aggregates which shall be determined by the Contractor by an approved method.

2.9.4 Moisture content of aggregates

The moisture content of aggregates shall be measured immediately before mixing and as

frequently thereafter as is necessary to maintain consistency of mix. 2.10 Mixing concrete 2.10.1 Type of mixer

The mixer shall be of the batch type, unless otherwise approved, and shall have either been manufactured in accordance with BS 1305 or shown by tests in accordance with BS 3963 to have mixing performance within the limits of table 6 of BS 1305.

2.10.2 Tolerance of mixer blades

The mixing blades of pan mixers shall be maintained within the tolerances specified by the manufacturers of the mixers, and the blades shall be replaced when it is no longer possible to maintain the tolerances by adjustment.

2.10.3 Cleaning of mixers

Mixer which has been out of use for more than 30 minutes shall be thoroughly cleaned before another batch of concrete is mixed. Unless otherwise specified by the Engineer, the first batch of concrete through a mixer shall contain the normal batch quantity of cement and sand, but only two thirds of the normal quantity of coarse aggregate. Mixing plant shall be thoroughly cleaned between the mixing of different types of cement.

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2.11 Transporting concrete 2.11.1 Method of transporting

The method of transporting concrete shall be submitted for approval. Concrete shall be transported in uncontaminated watertight containers in such a manner that loss of material and segregation are prevented.

2.11.2 Pumping concrete The use of pumped concrete and the methods employed in its use shall be subject to approval. 2.12 Ready mixed concrete 2.12.1 Conditions for use

Subject to approval the Contractor may use ready-mixed concrete in accordance with BS 1926. Approval shall be obtained for each proposed use of ready-mixed concrete in different sections of the Works and for each different mix, which shall comply with this specification.

2.12.2 Mixing of Concrete

Ready-mix Concrete from a Central Mixing Plants is only permitted. All the details of the Mixing Plant and relevant Test Results should be submitted to the Engineer for the approval.

The Contractor will maintain on site cellular telephone link between site and the Concrete Mixing Plant and record times of Truck Mixer leaving Plant, arriving at the site and the Truck Mixer number. Copies of all records are to be delivered to the Engineer’s Representative daily or more frequently, if requested.

. 2.12.3 Placing of Concrete At least 24 hours before the Contractor proposes to place concrete in any section of the

works, he shall notify the Engineer as to his proposed time of commencing. When the Contractor has completed all preparatory work such as surface preparation, form work, reinforcement, built-in parts etc. he shall request the Engineer for written approval to commence concreting at a particular time not less than 3 hours after until all preliminary work has been checked and written approval given by the Engineer.

2.12.4 Curing Concrete Concrete shall be protected against harmful effects of weather, running water and drying

out by one of the following methods appropriated to the particular situation. A liquid curing compound shall be applied to the concrete surface by a low pressure spray

until a continuous visible covering is achieved. The concrete surface shall be covered with Hessian, sacking, canvas or other absorbent

material agreed by the Engineer. The concrete surface shall be covered with polyethylene sheets; concrete surfaces which

have become dry shall be thoroughly wetted before the sheeting is placed. The minimum curing period shall be seven (07) days. 2.12.5 Co-ordination Drawings

Contractor shall be responsible to prepare and submit to the Engineer for approval

following documents at least six weeks before the commencement of the work.

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(a) Co-ordination drawings (b) Shop Drawings (for formwork, masonry work including the stiffener column/ beam arrangements, roof steel work) (c) Bar bending schedules (d) Construction drawings for all temporary works (including shoring cut-off wall

construction, dewatering system etc.) (e) Drawings for pouring patterns, casting sequence construction joints 2.12.6 Mixing plant

Unless otherwise agreed by the Engineer, truck mixer units and their mixing and discharge performance shall comply with the requirements of BS 4251.

2.13 Steel Reinforcement 2.13.1 Condition Steel reinforcement shall be stored in clean conditions. It shall be clean and free from

loose rust and loose mill scale at the time of fixing in position and subsequent concreting. 2.13.2 Grade

The grade of steel shall be as specified in the drawings. 2.13.3 Bending of reinforcement No reinforcement shall be bent at a temperature lower than 5°C without prior approval.

Before bending, reinforcement may be warmed to a temperature not exceeding 100°C. If reinforcement already cast into concrete has to be bent, the internal radius of the bend shall be not less than twice the diameter of bars of mild steel or three times the diameter of bars of high-yield steel.

2.13.4 Placing of reinforcement Reinforcement bending schedules shall be prepared and produced for Engineers approval

by the Contractor. Bending and fixing of bars shall start only after the Contractor has convinced himself that no changes will be made to the concrete structure. Mill certificates of composition and strength of steel and certificate of strength tests on samples of steel purchased for use on this project and tested in an independent approved local laboratory should be furnished.

All intersecting bars shall be tied together with approved wire unless otherwise permitted by

the Engineer. Reinforcement in the form of a mat shall be assembled with additional support, such as

benches, necessary to form a rigid mat. Reinforcement shall be placed and maintained in position.

The cover to all reinforcement shall be not less than 25mm thick. Spacer blocks shall be approved and shall be as small as possible consistent with their

purpose. They shall be made with 10 mm maximum aggregate size and shall have a strength not less than that of the concrete to be placed.

2.13.5 Welding of reinforcement

Welded joints and welding procedures shall be carried out in accordance with BS 693 or BS

1856.

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3. FOUNDATION 3. 1 General

All materials and work shall be in accordance with sections 1 and 2 of this specification,

and this section, except where there may be conflict of requirements, in which case those in this section shall take precedence.

3.2 Contractor to keep Engineer Information The Contractor shall obtain the Engineer’s approval on the following aspects of the Works

before commencement of work. The aspects of the Works so appeared shall not be changed without the prior approval of the Engineer.

(a) Samples and testing (b) Types of cement (c) Types of aggregate (d) Grades of concrete (e) Designed or prescribed mixes (f) Grades and types of reinforcement (g) Laying of reinforcement (h) Shuttering and formwork. 3.3 Soil Samples Soil, rock or groundwater samples shall be taken, or soil tests carried out insitu, while in

earth excavation compacting. The samples shall be taken to an approved laboratory for testing as specified.

The taking of samples and all subsequent handling and transporting shall be carried out in

accordance with CP 2001. 3.4 Setting out The Contractor shall check the position for each column and beam during and immediately

after placing the concrete, such that the column when completed shall be within the specified tolerances for the position of the grids.

3.5 Placing of Concrete 3.5.1 General The method of placing and the workability of the concrete shall be such that a continuous

monolithic concrete of the full cross-section is formed. The concrete shall be placed without such interruption as would allow the previously placed

batch to have hardened. The method of placing shall be approved. The Contractor shall take all precautions in the design of the mix and placing of the

concrete to avoid arching of the concrete in Pad foundation. No spoil, liquid or other foreign matter shall be allowed to contaminate with the concrete.

3.5.2 Workability of concrete Slump measured at the time of discharge into the Pad foundation shall be in accordance

with the standards shown in Table 3. Concrete shall be of the workability approved under clause 2.6 when in its final position and

after all constructional procedures in forming the Pad have been completed.

Table 3 Workability of Concrete

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mix

workability

Slump

Typical conditions of use Minimum

mm Maximum

mm

A

75

125

Placed into water-free. Widely spaced reinforcement leaving ample room for free movement between bars

B

100

175

Where reinforcement is not spaced widely enough to give free movement between bars.

3.6.3 Compaction

Poker vibrators shall be used to compact concrete unless the Contractor is satisfied that

they will not cause segregation or arching of the concrete and unless the method of use has been approved.

3.6.4 Backfilling in and around Pad Foundation After gaining sufficient strength of concrete then carefully backfilled as soon as possible

with approved material and compacted as approved. 4.0 EXCAVATIONS 4.1 Classification of Excavation For the purposes of payment excavation will be classified as “Common Excavation” or

“Rock Excavation”. “Common Excavation” includes all materials other than rock classified as below, including

but not restricted to earth, gravel, soft or disintegrated rock and also detached pieces of rock less than one cubic meter in volume.

“Rock Excavation” will include all solid rock in place and/or detached pieces of rock of

more than one cubic meter in volume which cannot be removed unless loosened by any one or combination of blasting, barring, wedging and dozing or hauling with machinery.

4.2 Stripping of Top Soil Where the existing ground surface is covered with vegetation, topsoil or other unsuitable

material, it shall be stripped in the following manner, before opening any excavation from which it is proposed to derive suitable material for filling, or in the case of a filled area, before placing any fill material thereon. After any clearing and grubbing, all grass and other remaining vegetation, together with roots, loose stones, rubbish of all sorts and soft or objectionable matter shall be removed along with the topsoil, to a minimum depth of 300 mm.

4.3 Excavation and Preparation of Foundations to Structures

Except as otherwise shown on the Drawings or prescribed by the Engineer, excavation

shall be made to the levels, outlines and dimensions of the structures or to the levels and grades in areas marked for excavation as required. The Contractor shall make his own allowances for any lateral excavation which he may require outside the limits shown for the required excavation.

It shall be the responsibility of the Contractor to maintain the stability of all excavated

faces during construction by timbering, over excavating to a stable slope or by other acceptable methods, and dewatering.

The disposal of excavated material shall be as described in Clause 4.6. Excavated surfaces where ground improvement techniques are not envisaged shall be

so finished as to provide a foundation to the satisfaction of the Engineer upon or

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against which fill material is to be placed. The Engineer may order the additional excavation and disposal of unsuitable material and its replacement with either compacted fill in accordance with Clause 4.4 hereof or 1:4:8 (40 mm) mass concrete. The cost of such additional excavation and replacement shall be borne by the Contractor, if in the opinion of the Engineer it is necessitated by any non-compliance of the Contractor with the requirements of these specifications, and otherwise by the Employer.

Blasting operations for rock excavation shall be subject to the requirements of Clause 4.5 hereof. Rock excavation may require special blasting procedures such as cushion blasting or pre-splitting as approved by the Engineer to ensure sound, unsheltered rock after excavation. After blasting, shabby, weathered and dummy rock shall be scaled and trimmed and loosened rock shall be removed by chiseling, picking, sledging and barring,. The final rock foundation surfaces shall be free from steep angles and sharp projections.

Any and all excess excavation beyond that approved or directed by the Engineer and

refilling of the same with approved materials shall be carried out at the expense of the Contractor.

4.4 General Excavation in Project Area and for Canals, Roads and Drains After stripping the top soil where required in accordance with Clause 4.2 hereof,

excavation shall be carried out to the widths, depths, side slopes and gradients shown on the drawings and/or established by the Engineer and shall be finished uniformly to the prescribed lines. In so far as practicable, the finishing operations shall be performed simultaneously with those required for any associated embankments.

Additional excavation that is outside and below the lines of the normal unlined prism of a

channel and required to provide space for the placing of concrete or earth lining rip rap or pitching shall be carried out separately with the commencement of lining operations. The cost of such additional excavation shall be included in the cost of lining.

Blasting procedures for rock excavation shall conform to the requirements of Clause 4.5

of these Specifications. 4.5 Explosives and Blasting 4.5.1 General The location and design of explosives magazine, the methods of transporting explosives

and the precautions taken to prevent accidents shall be in accordance with the provisions of all State Statute, Ordinance, Decree or other law or any regulation or by-law or any local or other duly constituted authority that are in force and the written safety directives of the Engineer. Caps, detonators or fuses shall in no case be stored, transported or kept in the same place in which dynamite, or other explosives are stored, transported or kept.

4.5.2 Materials Explosives, detonators, fuses, tamping materials, etc. that are proposed to be used by

the Contractor in the blasting operations shall have the prior approval of the Engineer. The use of fuse with only one protective coat is prohibited. Tamping rods shall be wooden, with cylindrical ends without any kind of metal on them.

4.5.3 Inventory In addition to the requirements of handling and storing explosives the Contractor shall

maintain an inventory for storage and withdrawal of powder stocks, cartridges, fuses and detonators, and the Engineer shall be notified immediately of any loss or theft of explosives. The Contractor shall provide such reasonable and adequate protective facilities as may be necessary to prevent the theft of explosives and to minimize hazards of subversive action or sabotage to any property.

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4.5.4 Blasting Blasting will be permitted only by competent personnel and only when proper precautions

are taken for the protection of persons, the Works and public and private property. Wherever necessary in the Engineer’s opinion the Contractor shall drill shorter holes and use lighter charges so that the excavation will not be unduly large or irregular, or blasting unduly disturb the ground and make it unstable, shatter the rock upon or against which concrete is to be placed or injure concrete already placed, or existing structures at the site or in the vicinity thereof. Approval by the Engineer of any of the Contractor’s blasting operations shall not relieve the Contractor of his responsibility under this Clause.

4.5.5 Cost

The cost of furnishing, hauling, storing, and handling of all blasting materials and all other

operations described above shall be included in the bid for the work for which they are intended.

4.6 Re-use and disposal of Excavated Materials All suitable material arising from excavation which meets the requirements of these

Specifications for filling shall be cleared of all objectionable materials and shall be stocked re used as approved by the Engineer. Where applicable the Contractor shall carry out excavation in such a manner as to avoid mixing suitable material with material unsuitable for filling.

All surplus or unsuitable materials shall be hauled to approved spoil areas, spread to approved dimensions

and finished neatly to the satisfaction of the Engineer. The Contractor will generally not be required to haul materials for disposal further than the nearest location suitable, in the opinion of the Engineer, as a spoil area. No extra over payments will be made on account of haul distance. Compaction of spread material may be required when spoil areas are unavoidably located close to canals or water courses and the material is likely to be washed away by surface run-off, causing salutation or pollution therein.

5. BORROW AREAS 5.1 Source of Materials

When drawings identifying borrow areas and/or quarries are not furnished by the

Engineer, the Contractor shall submit for the approval of the Engineer his proposals for the sources of construction materials complying with these Specifications. Approval of any borrow area/quarry or any part thereof, may be withdrawn at any time for any or all uses, regardless of whether the borrow area/quarry was identified by the Engineer or proposed by the Contractor. The extent and depth of any borrow area/quarry shall be subject to the approval of the Engineer.

The Contractor shall be responsible for ascertaining the owner or tenant of the site of any proposed borrow area/quarry and shall obtain all necessary consents and pay all compensation and royalties. The Contractor shall be responsible for the compliance of all borrow area operations with State Statute, Ordinance, Degree or other Law or By-law of any local or other duly constituted authority

5.2 Location of Borrow Areas

The location of any borrow area or quarry from which material is to be transported to site

shall approved by the Engineer. 5.3 Exploitation of Borrow Areas Before the commencement of any filling the Contractor shall submit for the

32

approval of the Engineer a drawing showing the borrow areas and sources of fill from other excavation, proposed for the provision of the required fill materials, and involving the minimum possible haulage cost to the Employer.

The borrow area shall be cleared of jungle if necessary and stripped as described in

Clause 4.2 hereof all at the expense of the Contractor. Where borrow is being extracted from paddy lots, all top soil must be carefully stockpiled for later reinstatement.

The excavation in borrow areas shall be selective with such processing, including

irrigation or desiccation, and such selective placing and mixing of the materials excavated as may be necessary to obtain the fill materials specified, both with regard to grading and moisture content.

If unsuitable materials are found in borrow areas they shall be left in place, or excavated

and disposed of in accordance with Clause 4.6 hereof at the expense of the Contractor, if necessary for the extraction of further suitable materials or if directed by the Engineer.

On the completion of borrow extraction the borrow areas shall be left in a reasonably

smooth, free draining and tidy condition to the satisfaction of the Engineer. Where borrow has been extracted from paddy lots, the top soil shall be replaced in a

uniform layer and finished to the level or levels directed by the Engineer. 5.4 Quarries Quarries for rock, aggregates, gravel and/or sands shall be subject to the approval of the

Engineer. Rock quarries shall be selected so that blasting operations will not endanger the safety of the neighborhood.

The location of gravel quarries shall be such that the excavations do not endanger the

stability of the surrounding areas. River sand quarries shall be selected remote from the banks of the river. 5.5 Stockpiles

Where stockpiling is necessary, separate stockpiles of different materials shall be formed according to their known characteristics, which shall be recorded by tests during the formation of the stockpiles. The location of the stockpiles shall be subject to the approval of the Engineer. The residue or the sites of such stockpiles shall be left in a stable, well drained and tidy condition.

6. TESTING OF MATERIALS AND COMPACTION The Engineer may order the performance of any of the following tests on the materials

and compacted fill in accordance with BS 1377 : 1975 or ASTM:D2049 at such times and locations as he may, decide. The tests shall be performed either by the Contractor’s own testing laboratory, or by an approved independent testing laboratory, as approved by the Engineer.

- Particle Size Distribution BS 1377 Test 7A or 7B - Liquid Limit BS 1377 Test 2A or 2B - Plasticity Index. BS 1377 Test 4 - Dry Density/Moisture Content Relationship. BS 1355 Test 13 (5.0 kg rammer method) - Moisture Content BS 1377 Test 1A, B or C - Dry Density BS 1377 Test 15A, B, C or D - Test D2049 of ASTM for relative density of the draining material The Contractor shall provide at his own expense for any labour, transport,

33

communication or other assistance which the Engineer may require in the collection and delivery of samples and testing in the field. No handling charges or other additions shall be paid to the Contractor.

Each type of tests shall be generally be carried out at a frequency of once in every 400

m3 of compacted volume or as required by the Engineer.

All test results shall be passed to the Engineer as soon as they are available. In the

event of any of the compacted fill incorporated in the Works failing to achieve the specified results for any of the above tests, the Engineer may order the removal and replacement and/or re-compaction as appropriate of such portions of the fill as are in his opinion represented by the failed results.

7. FORMWORK 7.1 Construction of Formwork 7.1.1 The Contractor shall be totally responsible for designing the Formwork and

supporting props required to construct the structure in accordance with the Contract.

7.1.2 The Contractor shall submit detailed calculations and drawings of the proposed

Formwork system to the Engineer for his approval well in advance of the actual commencement of the work at site.

7.1.3 The Formwork shall be of sufficient strength and stability to safely support the wet

concrete and any incidental loads which may be applied to the concrete surface before it has attained sufficient strength to enable it to safely carry such loads unsupported.

7.1.4 The maximum elastic deflection of any formwork component shall not exceed

1/500th of its span.

7.1.5 The formwork shall be constructed with sufficient camber to ensure that the

finished soffits and top surfaces are plane and true. 7.1.6 The Contractor shall ensure that those parts of the structure supporting Formwork

for other parts have attained sufficient strength to carry the loads thus imposed without causing structural distress and any elastic deflection greater than 1/300

th of

the minimum span of such a part. 7.1.7 In all water tight walls, formwork ties shall be left embedded and shall consist of

steel pins with steel discs welded all round (water-tight) to them. The disc shall be located centrally in the wall.

7.2 Soffit Formwork

The final top surface level of the slab should be correct to a tolerance of -3mm in 3m. 8. STEEL WORK 8.1 All mild steel works and components whether used internally or externally shall be either

hot dip galvanized to BS 729 ; 1971 or shall be painted with 2 coats of epoxy paint.

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8.2 All steel works to be grit blasted and made absolutely clean and free from all rust grease oil mill scale, dust or other deleterious substances before application of any protective system.

8.3 All minor damages to protective coating of steelworks shall be repaired without delay

damages deemed by the Engineer to be more than accepted minor damage will result in the rejection of the component involved.

9.0 BRICK WORK, BLOCK WORK AND RUBBLE MASONRY

9.1 Materials

Mortar for Brick Work, Block Work and Rubble Masonry.

Mortar for brick work and block work shall conform to Section 9.31. The mortar designation shall be

1:5 unless otherwise specified in the Drawings or in the BOQ.

9.2 Common Burnt Clay Bricks

Common burnt clay bricks shall conform to SLS 39/1978 amended in Amendment No.1/1981.

Bricks shall be hand or machine moulded. They shall be regular in shape with good clean arises,

free from lumps of unslaked limestones etc.

Their surface shall free from striations, laminations, pittings, cracks etc. They shall be uniform in

colour and must be well burnt so as to give a clean ringing sound when struck. When broken the

fracture shall give a close grained uniform texture and colour and shall be free from black core or

any sign of being imperfectly burnt.

9.3 Sampling and Testing of Bricks

The bricks shall be sampled and tested for dimensions, general requirements, compressive

strength, water absorption and efflorescence as per SLS 39. Acceptance criteria shall be as set

out in the same standard.

9.4 Handling of Bricks and Preparation

Bricks shall not be handled in baskets, thrown from a height or in other manner that would

destroy the sharpness of the edges. In no case shall bricks of different dimensions be

used in the same work except when permitted by the Engineer.

In exposed brickwork, selected bricks of the specified class shall be used for the face

work.

The bricks shall be wetted with water before use on the works. Bricks require for masonry

with mud or flat lime need not be wetted. The tops of walls left off shall be wetted before

the work is recommenced.

9.5 Laying and Jointing

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Bricks shall be laid in English bond unless otherwise specified. Half or cut bricks shall not

be used except where necessary to complete the bond; Closure in such cases shall be cut

to the required size and used near the ends of walls. In all load bearing walls, the brick

shall be laid with frogs upwards and the frogs shall be filled with mortar.

A layer of mortar shall be spread on full width over a suitable length of the lower course.

Each brick shall be properly bedded and set in position by tapping with the handle of a

trowel or wooden mallet. Inside faces of the set brick shall be buttered with and the next

brick to be laid shall be pressed against it. All bricks in every course shall be grouted full

with mortar using the trowel for chasing in for this purpose. The thickness of the mortar

joint shall not exceed 10 mm.

9.6 Raising of Walls

The quoins shall be set out and built up in advance of the main body of the brick walling.

The walls shall be carried up uniformly in all cases where the nature of the work admits it.

No part shall be left more than 1 meter below the rest of the work. The work shall not be

built higher than 1.5 m in one day. The courses shall be kept perfectly horizontal and

every fourth course shall be kept perfectly horizontal and checked for levels and plumb.

At the end of the day’s work, and where it is not possible to raise the adjoining portion

uniformly and in gable walls, the work shall be raked back according to the bond, at an

angle not steeper that 45 degrees. All perpends, quoins etc., shall be kept strictly true and

square and the whole properly bonded together and brought to final levels at each floor.

Over hand laying shall not be used without approval. Panel walls or non-loading bearing

walls shall not abut against the Concrete beams.

The lateral stability of walls, which are free standing during construction, shall be ensured stability

by adequate shoring and scaffolding until the roof or floor providing the necessary stability is

constructed.

9.7 Curing and Protection

Brickwork shall be protected from rain by suitably covering when the mortar is green. Brickwork in

cement/composite/lime mortar (except fat lime mortar) shall be kept constantly moist on all face for

a minimum period of seven days. In the case of masonry with fat lime mortar, curing shall

commence two days after and shall continue at least for seven days thereafter.

9.8 Fixtures

All iron fixtures like hold gates, pipes etc., which are required to be built into the wall shall be

embedded in their correct positions in cement mortar or cement concrete as specified.

9.9 Raking of Joints for Plaster

When the face work is to be plastered or joints along pointed upon, the joints shall be raked to a

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minimum depth of 12 mm by a raking tool during the progress of the work or when the mortar is still

green. When plastering or pointing is not required to be done, the joints shall be struck flush and

finished at the time of laying. The face and top of courses of the brickwork shall be cleaned

thoroughly of all mortar dropping on the same day.

9.10 Brick on Edge Coping

The top course of all plinths, the top of walls below reinforced concrete parapets, steps etc., shall be

brick on edge with extra fine vertical joints not exceeding 3 mm in thickness. Bricks forming the

corner of all such course are to be properly radiated and keyed into position.

9.11 Treatment at Ends of Beams

The ends of steel beams and roof trusses shall rest on recesses having 15 mm space for free

circulation of air and provided with perforated zinc sheeting.

9.12 Corbelling

Corbelling shall be effected by a one fourth brick projection (in every course) for ordinary work and

on eighth projection where greater strength is required.

9.13 Scaffolding

For all exposed brickwork, double scaffolding having two sets of vertical supports shall be

provided. The support shall be sound and strong and tied together with horizontal pieces

over which scaffolding planks shall rest. Alternatively, steel scaffolding may be resorted to,

in which case the arrangements shall be approved by the Engineer.

For all other brickwork in buildings, single scaffolding shall be provided. In such cases,

the inner end of the horizontal scaffolding pole shall rest in a hole provided for this purpose

in the header course only. Only one header for each pole shall be left out. Such holes

for scaffolding shall however not be allowed in pillars/columns less than one meter in width

or immediately near the skew back of arches, shall be completely packed and made good

before plastering.

9.14 Half Brickwork

The work shall be done in the same manner as specified above, except that all courses

shall be laid as stretchers. The proportion of cement mortar shall generally be on part

cement to 5 parts of sand.

9.15 Reinforced Brickwork

In special cases such as long unsupported partition walls where reinforcement

37

is considered necessary, 2 numbers of 6 mm diameter rods shall be provided at every

alternate course unless otherwise specified. The rods shall be straight and free from rust

and loose flakes. They shall be placed over cement mortar beds of 1:3 composition, 10

mm thickness of mortar shall be first laid, the rods laid and then covered with a bed of 10

mm mortar immediately. The rods shall be fully embedded in the mortar. At the ends the

rods shall be bent up for half the thickness of the course.

9.16 Honeycomb Brickwork

Standard or specified bricks shall be used for this class of work and they shall be laid on

cement mortar 1:3 or as specified.

The thickness of brick honeycomb shall be half brick or one brick as specified. Openings

shall be equal and alternate in every course and the bearing width on each side shall be 20

mm minimum. The bond used shall be heading throughout in one brick thick honeycomb

work. The bricks shall be thoroughly bedded in mortar and jointed and the edges struck

flush and finished smooth as the work proceeds.

9.17 Brickwork in Arches

Bricks for arches shall be specially selected and shall be free from any defects of any sort.

The bricks shall be laid in concentric half brick rings with break joints (i.e. staggered joints).

The arch work shall be carried out from both ends simultaneously and keyed in the centre.

The bricks shall be buttered with mortar and well pressed into their positions so as to

squeeze out a part of the mortar and leave the joints thin and compact.

All joints shall be full of mortar and the thickness of joints shall neither be less than 5 mm

nor more than 15 mm in all arches.

The voussoir joints shall be normal to the curve at these points.

Bricks forming skew joints shall be specially moulded or cut so as to radiate thinly, and

defects in this particular case shall not be remedied by the extravagant use of mortar nor

shall any patching by chips allowed.

Joints in any two consecutive rings shall not come in the same radial plane.

The arch work shall be quickly and evenly done and kept moist so that no portion of the

arch hardens or sets before the whole arch is completed.

9.18 Centering for Arches

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In all cases the upper bearing surface shall be very correctly formed to the curve of the

intrados of the arch. The centering shall be strong enough to bear the dead load and live

load coming upon it, during the construction without appreciable deflections. For spans

longer than 2 meters, timber centers shall be used and shall be provided with hardwood

wedges for slackening. For larger span arches special plans for centering shall be

prepared and prior approval of the Engineer obtained.

In all centering the arrangement shall be such that the slackening can be effected without

any vibration being transmitted to the arch, and in the case of a series of arches that the

centers can all be slackened simultaneously.

The time after which this slackening has to be done shall be carefully decided.

When lime mortar is used, centers will ordinarily be slackened within 24 hours of the

completion of the arch. Care, however, shall be taken to see that the centering is not

eased while the mortar in the last joint is so that it will be squeezed out, but at the same

time centres will be slackened while the mortar in the joints is still moist so as to allow the

arch to compress itself and bring all the joints to fair bearing.

In the case of a segmental arch, care shall be taken to see that the skew back are secure,

and they shall be given a week’s time to set.

In the case of semi-circular, elliptical or other arches springing from a horizontal joint, the

adjacent wall, shall be built up to thirds of the height of the arch before slackening centres.

9.19 Jointing Old Work with New Work

New work shall be bonded carefully to existing work by cutting pockets into existing walls;

the pockets shall not be less than 10 mm deep, with a width equal to the full thickness of

the new work. The spacing and height of each pocket shall be as follows: for jointing of :

Brick to Brick – 4 course high at 8 course centres

Brick to Block

Block to Brick Every alternate block course

Block to Block

The new walling shall be bonded well into the pockets with all voids filled with solid mortar.

9.20 Block Work

The word “block” could be substituted for “bricks” wherever appropriate in the above

section.

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9.21 Random Rubble Masonry

Materials - Stone

Stone shall be of the type specified. It shall be hard, sound, free from decay, weathering

and defects like cavities cracks, flaws, sand holes, veins, patched or soft or loose materials

etc.

It shall be obtained from an approved quarry. Stones with a rounded surface shall not be used.

The Contractor shall submit samples of stones representing the range of variations to be used in

the work and obtain the approval of the Engineer.

Normally stones used shall be small enough to be lifted and placed by hand. The length of the

stone shall not exceed three times the height and the breadth on base shall not be greater than ¾

of the thickness of the wall nor be less than 150 mm. The height of a stone may be4300 mm

maximum.

9.22 Dressing

Stone shall be hammer dressed on the face, the side and the beds, to enable it to come into close

proximity with the neighbouring stone. The bushing in the face shall not project more than40 mm

on an exposed face and 10 mm on a face to be plastered.

9.23 Mortar

The mortar used for jointing shall be as specified and conform to Section 4.31.

9.24 Laying

All stones shall be cleaned and free of dust and shall be wetted before use. Chips, spalls etc.,

shall be washed clean with water to ensure a clean surface for the mortar to adhere to.

The stones shall be laid on their natural bed on a full even bed of mortar. Every stone shall be

carefully fitted to the adjacent stones, so as to form neat and close joints. Stones may be brought

to level the course at plinth, window sills and roof level. Levelling up at plinth level, window sills

and roof level shall be done with concrete comprising one part of the mortar as used for the

masonry and two parts of graded stone aggregate of 20 mm nominal size. The bond shall be

obtained by fitting in the adjacent stones closely, and by using bond stones.

Face stones shall be extended and bonded well into the 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 rubble stones which may be of any shape but shall not pass

through a circular ring of 150 mm in diameter. The thickness of these stones in any direction

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shall not be less than 100 mm. These shall be carefully laid, hammered down with a wooden

mallet into position and solidly bedded in mortar. Chips and spalls of stone being used wherever

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 hearting will be laid nearly level with

facing and backing, except that at about 1 m intervals, vertical plums projecting about 150

mm to 200 mm shall be firmly embedded to form a bond between successive courses.

The chips shall not be used below the hearing stone to bring these up to the level of faced

stones. The use of chips shall be restricted to the filling of interstices between the

adjacent stones in hearting, and these shall not exceed 20% of the quantity of stone

masonry.

The wall shall be carried up truly plumb or to the specified batter. The masonry in a

structure shall be raised uniformly. Where the masonry of one part has to be delayed, the

work shall be raked back t an angle not steeper than 45 degrees. Toothing in stone work

shall not be allowed.

9.25 Bond Stones/Through Stones

A sufficient number of bond stones or through stones shall be used in building the wall. At

least one through stone shall be built into the wall a intervals of 1.8 m horizontally and 0.6

m vertically. Such stones shall be at least 150 mm square at the face and shall and shall

run to the full thickness of the walls up to 600 mm. In case of walls exceeding 600 mm in

thickness,

more than one stone may be used to run through the full thickness of the wall with overlaps

of not less than 150 mm.

In case of highly absorbent types of stones (porous limestone and sand stone) the bond

stone shall extend about 2/3 into the wall. Through stones in such cases may give rise to

damp penetration. Hence, for all thickness of such walls, a set of two or more bond stones

overlapping each other by at least 150 mm shall be provided.

Where bond stones of suitable length are not available, cement concrete blocks or 1 : 3 : 6

mix conforming to the sizes mentioned above shall be used.

All bond stones in stone masonry shall be marked suitably for identification as directed by

the Engineer.

9.26 Quoins

The quoins shall be of selected stones neatly dressed with the hammer or chisel to, from

the required angle, and laid header and stretcher alternately. The Quoins shall be set out

and built up in advance of the main body of the rubber walling.

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9.27 Joints

Stones shall be so laid that all joints are fully packed with mortar and chips. Face joints shall not

be more than 20 mm thick.

When plastering or pointing is not required, the joints shall be struck flush and finished at the time of

laying, otherwise the joints shall be raked to a minimum of depth of 20 mm by a raking tool during

the progress of work, when the mortar is still green.

9.28 Scaffolding

Single scaffolding having one set of vertical supports shall be allowed. The supports shall be

sound and strong, tied together by horizontal piece over, which the scaffolding planks shall be fixed.

The inner end of the horizontal scaffolding may rest in a hole provided in the masonry. Such holes

however, shall not be allowed in pillars under one meter width or near skew-bank of arches. The

holes left in masonry for supporting scaffolding shall be filled with a proper sized stone and packed

completed, or it allowed made good with cement concrete 1:3:6.

9.29 Curing

Masonry work in cement or composite mortar shall be kept constantly moist on all face for a

minimum period of 7 days. In the case of masonry with fat lime mortar curing shall commence two

days after the laying of masonry and shall continue for at least seven days thereafter.

9.30 Protection

Green work shall be protected from rain by suitable covering. The work shall also be suitably

protected from damage, mortar dropping and rain during construction.

9.31 Mortar for Brickwork, Block work and Rubble Masonry

Cement mortar shall normally consist of ordinary Portland Cement, Sand and Water in the

proportions specified. Lime shall be added only where specified.

Mortar shall be mixed thoroughly, either by hand or mechanically until its colour and consistency are

uniform.

Water shall be added in stages to make a mortar that can easily be handled and trowelled. It shall

be mixed in small quantities only as and when required and shall normally be used within 45

minutes of mixing. Mortar, which has been mixed for more than 1 hour and shows signs of

hardening, shall be discarded.

The constituent materials shall normally be volume proportioned as accurately as

practicable making allowance for bulking of sand and also of the cement.

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9.32 Cement and Sand Rendering (20 mm) 1:3 Cement & Sand Mortar

Rendering 20 mm thick in 1:3 cement mortars. The work shall consist of rendering of the

exposed faces of random rubble masonry walls as directed by the Engineer.

The mortar shall be composed of one part of cement and two parts of sand by dry loose

volumes and sufficient water to make a mortar that can easily be handled and trowelled,

hand smooth and finished with wooden float with neat cement slurry to give a true and even

surface with all arises square and internal angles slightly rounded. Retempering of mortar

that has not been used in excess of 45 minutes will not be permitted.

Payment for rendering shall include for all materials, templates, centering, screed and rules,

scaffolding and labour required to complete the works. No additional payment will be

made for picking up or dubbing out which may be required to level off the surface

irregularities of the masonry work.

10. TILING 10.1 General

Glazed Ceramic Tile shall comply with British Standard Specification No. 1281 and shall be approved sizes as shown on Drawings and the product of a reputable manufactures approved by the Engineer.

Unglazed Ceramic Tile shall comply with the requirements of British Standard No. 1286 and shall be of approved sizes as shown on the drawings and the product of a reputable manufacturer.

All tiles shall only be used with prior written approval of the Engineer.

Standards requirements for tiles should be ISO standards. Any defect materials which need to be replaced shall be replaced by the Contractor with his own cost.

Description of the test Values Reference Standard Length and Width ISO 10545.2 Rectangularity ISO 10545.2 Thickness ISO 10545.2 Straightness of Sides ISO 10545.2 Surface Flatness

43

i. Centre Curvature related to the diagonal calculated work size ISO 10545.2

ii. Edge Curvature related to the corresponding work size

ISO 10545.2

iii. Warp age related to the diagonal calculated from work size ISO 10545.2

Surface Quality ISO 10545.2 Water Absorption by Mass ISO 10545.3 Thermal Expansion ISO 10545.8 Resistance to Thermal Shock ISO 10545.9 Resistance to Stains ISO 10545.14 Colour Resistance to light BS-6431 (Part 6) Frost Resistance ISO 10545.12 Resistance to Crazing ISO 10545.11 Determination of Chemical Resistance ISO 10545.13 10.2 Ceramic and Porcelain Tile Materials Ceramic and Porcelain Wall Tiles : All tiles for wall installation shall have cushion edge, impervious porcelain and highly glazed surface. Colors shall be as selected by the Engineer and shall include trimmers, corner pieces, bull nose and all other special shapes indicated or required. All this shall be free from flaws, cracks and crazing. Ceramic and Porcelain Floor Tiles : Non-slip ceramic tile for shall be used on all floor locations. Floor tiles shall be specially prepared for floor use but shall have all the qualities of ceramic tiles listed above for wall use. 10.3 Mortar Materials Standard brand of light gray or white Portland cement as specified in drawings, confirming to current British Standard specifications shall be used. Sand : shall be clean, sharp, river sand, confirming to British Standard Specifications and graded fine to coarse within the following limits : 100% passing 8 sieve, 90% to 100% passing 16 sieve, 60% to 90% passing 30 sieve, 25% to 55% passing 50 sieve and 0% to 15% passing 100 sieve. 10.4 Cement Colour

Dry cement colour, chemically inert, non fading, alkali fast mineral pigment as approved shall be used wherever refinished. 10.5 Water Proofing

Floors of toilet areas, corridors, terrace and planter boxes shall be treated with an appropriate water proofing coating, approved by the Engineer.

10.6 Installation Requirements

As far as possible, tile lay out work should be in such ways that no tile less than half size

occurs.

Align joints in wall tile vertically and horizontally except where other patterns are

44

shown or specified, Align joints in floor tiles at right angles to each other straight with walls to confirm to the patterns selected.

Verify locations of accessories before installing tiles. Work shall be coordinated with plumbing and other trades before starting of tile work.

Installation of ceramic and vitreous tile shall be in accordance with manufacturer’s

instructions.

10.7 Floor Tile Installation

All ceramic and vitreous clay tile floors shall be in Portland Cement setting beds. Concrete surfaces shall be cleaned and surface of concrete shall be wetted prior to placing of setting bed mortar. Tiles shall be immersed in water for minimum of 4 hours before laying.

Setting Bed Mortar Mix : shall consist of one (1) part Portland cement and three (3) parts dry sand, by volume, to which not more than 1/10 part of hydrated lime may be added.

When mixed with water, the water mix shall be of such consistency and workability as to produce maximum density. Determine consistency by stroking the mortar surface with a trowel. Whereof correct consistency; the trawled surface readily assumes a smoothed, stickened appearance.

Spread setting bed mortar and screed to provide smooth, dense beds with true planes pitched to drains. The thickness of bed shall be such that the floor tile will finish with adjacent finished flooring, but bedding shall have average thickness of 12mm.

After bed has set sufficiently to be worked over, trowel or brush a thin layer, 3mm in thickness, of neat Portland cement paste over the surface of the back of tile. Do not prepare larger setting bed than can be covered with tile before the mortar sets.

Press tile firmly into the bed tapping with wood blocks to obtain firm bedding of total tile area and a smooth top surface.

All tiles shall be properly aligned with straight joints in even widths. Joints width shall be determined by spacers on ceramic tiles. Tamping shall be completed within one (1) hour after placing tile. Adjust work out of line within this period.

Tiles shall be fitted closely around pipes running through walls floors. Pitch floors to drains.

10.8 Wall Tile Installation

Base Plaster 20mm thick applied to masonry wall shall be one- part Portland cement three-parts of river sand by volume. Where additional thickness build- up is required to confirm to indicate lines, apply as separate coat at no cost to employer.

Setting bed of tiles shall be done with cement slurry. The thickness of slurry bed shall be 3mm thick minimum for setting tiles and walls.

Installation of tiles shall be in accordance with standards and applicable requirements previously specified for floor tile.

Tiles shall be installed in perfect vertical plumb and as per the pattern and joints as shown on drawings. 10.9 Grouting Grouting shall not commence for at least 24 hours after placing of tiles. Grout for floor and wall ceramic and vitreous tiles shall be water proof, neat white Portland Cement with dry cement color added as directed by the Engineer. If white grout is selected, cement shall be white.

45

Grout mixed to a creamy consistency in accordance with manufacturer’s directions shall be used for joint filling. Maximum width of joints shall be 3mm. Force maximum grout into the joints with trowel. Before grout set, strike or tool joints to base of cushion and fill all skips and gaps. Do not permit setting bed materials to show through grouted joints. Cure grout joints by maintaining damp condition for three (3) days by sponging down, or other methods approved by the Project Manager. Allow floors to set 48 hours before permitting ordinary foot traffic. 10.10 Defects in Tiles and Tile Laying The surface of all tiled floors shall be perfectly in level and shall be executed by experienced workers in the field of tile laying. A sample panel of laid tiles of each type shall be approved by the Consultant before commencement of tile laying. Chipped or damaged tiles installed by the Contractor shall be rejected and shall have to be replaced by the Contractor at his own cost and risk. 10.11 Guarantees Manufacturer shall provide the relevant standard guarantees for work under this section. However, such guarantees shall be in addition to not in lieu of all other liabilities which manufacturers and Contractor may have by other provisions of the Contract Documents. 11 PAINTING 11.1 Material All paints shall be approved by the Consultant for colour, quality and type. All painting work shall be carried out in accordance with the paint manufacturer’s specifications unless otherwise directed by the Consultant. All paints and finishes used for the project shall be manufactured by or under license from one of the following manufacturer’s;

� CIC or equivalent approved by the Consultant Paint shall be ready mixed and all paints, varnishes, enamels, lacquer stains, paste fillers and similar materials shall be delivered to the site in the original containers with the seals unbroken and lables intact. Each container shall give the manufacturer’s name, type of paint, colour of paint and instructions for reducing, Thinning shall be done only in accordance with the manufacturer’s directions. Use of product by the same manufacturer shall be a general rule in each stage of work in this Specification.

Colour, luster, colour scheme, finish shall be decided by the Engineer after checking sample paint test.

The painting shall be performed by experienced and competent painter.

Where walls are specified to be painted, all columns arises, groove, rough surfaces, reveals, soffits and returns etc. shall be included and no extra shall be payable.

11.2 Definition of Terminology

Surface Sealing- Surface to be painted shall be sealed to have uniform suction and

46

prevent lye from oozing out.

Spot Puttying – All cracks and depressions shall be filled flush with putty.

Puttying - All surfaces to be painted shall be puttied uniformly flat surface.

Spot painting - Spot puttied area shall be touched up by paint.

Touch –up – Any damaged area after the prime coat has been applied shall be touched up.

Drying hour – The drying time of double coated paint shall be measured at the

temperature of 20’C and humidity of 70%.

Amount of Painting

The amount shall be standard amount of paint itself not including thinner. It shall increase or decrease depending on shape and surface condition in the process of painting.

11.3 Paint Finish Symbols

� OP - Synthetic resin mix paint finish

� EP - Polyvinyl acetate resin emulsion paint finish

� AEP - Synthetic resin emulsion paint finish

11.4 Painting in General

Preparation of Paint

Mixing : Paint content with pigment shall be thoroughly stirred to make a uniform

consistency.

Thinning : Portable water shall be used for thinning of emulsion paint and water-soluble paint. Proper thinner, product of the same manufacturer as paint, as a rule, shall be used for other types of painting. Percentage of thinning and viscosity shall be conducted with direction of manufacturer or catalogue as they very with the method of paint, temperature, type of material to be painted.

Allowable period of Use : Paint mixed with more than 2 types shall be used with direction of a manufacturer or catalogue as allowable period of use, mixing ratio and mixing method vary. The paint which has passed allowable period of use shall not be used.

Conditions of Painting

� Work shall not be executed in the following situations

� When humidity is above 85%

� When raining or its forecast

� When dusts are present

When temperature of surface is high under hot whether and bubbles are likely to develop on the painted surface. Conditions of Surface to be painted: Work shall not be executed or proper means shall be taken in the following situations.

� When surface is damp and wet.

� When condensation is likely to develop on the surface.

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All nail holes on veneer, board etc, shall be covered with proper rust-proof paint before the subsequent painting is applied in accordance with this specification. Performance

Paint shall be evenly and uniformed applied on the surface. Areas of difficult application such as pointed part, internal angle, welded part, etc. shall be thoroughly painted and double coated as necessary to deep uniform coating thickness. Painting shall be properly done by carefully selecting the painting method by the shape of surface and types of paint. Protection

Dangerous material such as paint, thinner, etc, excluding emulsion paint and water-soluble paint shall be kept in accordance with regulations concerned.

11.5 Procedure of Painting

Exterior – Surface of Mortar, Plaster and Concrete Synthetic resin emulsion paint – (gloss)

Coating Process No. of Coats

Type of Paint Drying hour Amount (kg/m

2)

1. Surface preparation Dry, clean and free from impurities

2. Surface sealing 1 Sealer for emulsion paint Longer than 4 hours

3. Grinding Grind with proper grinding tool

4. Apply waterproof sealant onto external wall surface prior to painting. Contractor to provide specification of suitable paint system to Consultant

1 Longer than 4 hours

5. Spot painting Synthetic resin emulsion paint

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6. Second coating 1 Synthetic resin emulsion paint

Longer than 4 hours

0.10-0.13

7. Finish coating 2 Synthetic resin emulsion paint

Longer than 4 hours

0.10-0.13

Notes :

� Degree of dryness on the surface to be painted shall be kept under 6% in water

content and below PH 9.5

� Puttying and sanding process shall allowed to omit depending on the conditions of

the surface.

� Drying time of putty shall be long enough for sanding to proceed.

� Amount of sealer for surface sealing shall be adjusted with direction of the Project

Manager as it varies with the surface conditions.

Interior – Mortar, plaster, concrete etc Polyvinyl acetate resin emulsion paint finish (matt)

Coating Process No. of Coats

Type of Paint Drying hour Amount (kg/m

2)

1.Surface preparation

Dry, clean and free from impurities

2.Surface sealing 1 Sealer for emulsion paint Longer than 4 hours

3.Puttying 2 Putty for emulsion paint

4.Grinding Grind with proper grinding tool

5.Spot painting Polyvinyl acetate resin emulsion paint

6. Second coating 1 Polyvinyl acetate resin emulsion paint

Longer than 4 hours

0.11-0.13

7. Finish coating 2 Polyvinyl acetate resin emulsion paint

Longer than 4 hours

0.11-0.13

Notes :

� Degree of dryness on the surface to be painted shall be kept under 6% in water content

and below PH 9.5.

� Puttying and sanding process shall allowed to omit depending on the conditions of the

surface.

� Drying time of putty shall be long enough for sanding to proceed.

� Amount of sealer for surface sealing shall be adjusted with direction of the Consultant

as it varies with the surface conditions.

Exterior – Iron Products in General OP – Synthetic resin mix paint

Coating Process No. of Coats

Type of Paint Drying hour Amount (kg/m

2)

1.Surface preparation Completely remove rust, moisture, oil and other impurities by sander, cleaner and surface

2.First Coating 24 hours

1 Rust proof oil paint Longer than 24 hours

0.13-0.15

3.Touch-up Touch-up rustproof oil paint

4. First Coating

1 Rust proof oil paint Longer than 24 hours

0.13-0.15

5. Second coating 1 Synthetic resin mix paint Longer than 15 hours

0.13-0.15

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6. Finish coating 1 Synthetic resin mix paint Longer than 15 hours

0.13-0.15

Note : Paint for touch-up painting shall be same as used for first coat in process No.2 Exterior – Wood OP-Synthetic resin mix paint finished

Coating Process No. of Coats

Type of Paint Drying hour Amount (kg/m

2)

1.Surface preparation Clean and sand to plane surface

2.Knot treatment 1-2 Lacquer varnish Longer than 24 hours

3. First Coating

1 First coat paint of oil mix paint

Longer than 24 hours

0.13-0.15

4. Second Coating

1 oil mix paint Longer than 24 hours

0.11-0.13

5. Finish coating 1 oil mix paint Longer than 24 hours

0.11-0.13

Note : Puttying and sanding shall be done after process No.2 when there are cracks, etc on the surface putty shall be oil-putty, but drying time shall vary depending on conditions. Floor – Concrete and Mortar EXP – Epoxy resin paint finish

12 DOORS AND WINDOWS

12.1 Drawings

Tender drawings are intended to give a basic guide to the manufacture/ contractor as to the requirements in respect to the different types of work. They shall not be considered as final drawings. Builders working Drawings shall be prepared by the contractor indicating all details and fitments and approval obtained before assembly of the different items. Before commencement of manufacture of equipment, three copies of Working Drawing along with brochures, trade literature and photographs etc, properly marked to identify the specific items shall be submitted for approval by the Engineer. Drawings shall be prepared to acceptable standards showing construction details, materials to be used and all other details, dimensions, clearances etc. for proper manufacture of the items, properly labeled and dated with references for easy identifications. Note that samples of the doors and windows will require approval by the Consultant.

12.2 Dimensions

The drawings shall be taken as diagrammatic only, indicating the general sizes, arrangement and extent of work. The dimensions shall be checked against actual site measurements and exact relationship of the adjacent structures, services etc, and if any errors are found in position, levels, dimensions, alignment etc, such errors shall be brought to the notice of the Consultant and necessary amendments made accordingly.

12.3 Materials

All materials and equipment shall always be new and delivered on site with marker identifications labels intact. Where no specific kind or quality of material has been specified, materials and equipment of highest quality and most suited for the application concerned and available at time shall be supplied. When called for by the Engineer.samples of the materials shall be submitted for prior approval of its suitability and application for the Works undertaken.

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12.4 Doors and Windows

All windows and doors are to be constructed by approved specialist suppliers of medium section to the particular requirements noted on the drawings as to weight and profile. All sections shall generally conform to relevant British Standard Specifications.

All frames should be made to fit the actual openings with a 3mm clearance all around. Discrepancies in overall width or height exceeding 3mm will not be allowed and the frames will be rejected in such cases. Any small discrepancies shall have the gaps suitably backed and filled with gun-applied water repellant mastic sealant.

All sections shall be extracted from AA 6063 alluminium alloy and sections shall be designed to give rebated internal and external faces. Aluminium section for millions, frames, transoms, heads and the sills and the other members should strictly comply with the requirements laid down in the following British Standard.

B.S. 1161 : 1977 (1991) : Specification for aluminium alloy sections for structural

purposes. B.S. 1470 : (1987 ) : Wrought aluminium and aluminium alloys plate, sheet and strip

B.S. 1474 : (1987) : Wrought aluminium and aluminium alloys for general Project Managering purpose and external architectural application bars, extruded down tubes

and sections. All aluminium sections shall present clear, straight and sharply defined lines. They shall be free from defects impairing strength, appearance, durability and shall be designed to suit the required standard.

All aluminium extrusions shall be Natural Anodized to a Coating Thickness of minimum 10-15 microns, except partitions. Partitions shall be bronzed anodized aluminium extrusions. All sealants used in the assembly of, and in the fixing of cladding and window framing, shall be non-setting to allow thermal movement without detriment to those joint sealants used for peripheral caulking and shall be one part silicone sealant and shall conform to BS 4245. All spliced joints between mullions should be sealed with an approved silicone product, compatible with other sealants and pickings used.

The auxiliary components in sashes as locks, pivots, sliding gear etc, shall comprise of stainless steel or resisting materials.

The tolerances are to be as follows:

� Inside width of frame 3mm Maximum

� Inside height of frame 3mm Maximum

� Depth of frame 2mm Maximum

� Opposite side, Inside distance 2mm Maximum

The performance – associated requirements are

� Strength (resistance to wind pressure and other forces applied in use)

� Air tightness or ability to cut out drafts.

� Water – tightness against rain or dew.

� Sound arresting effect to (shut off noise from outside as well as inside)

All surfaces shall have an anodized protective surface layer of minimum 25 Micron thickness.

Glazing shall be done as specified by the Project Manager, Glass shall be clear glass, or as specified in the drawings. Thickness shall be according to the size of panels s given hereunder.

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Not exceeding 0.09 m2 2mm

Exceeding 0.09m2 but not exceeding 0.18 m

2 3mm

Exceeding 0.18m2 but not exceeding 0.36 m

2 4mm

Exceeding 0.36m2 but not exceeding 0.54 m

2 5mm

Exceeding 0.54m2 6mm

Required fittings :

� Single action door closer concealed in the head bar of the outer frame and mounted

on an adjacent pivot at the threshold and deadlock fitted.

� The left hand leaf of double doors with flush bolts at head and sill with deadlock fitted

to the right hand leaf.

� Escape doors to have panic bolts.

12.5 Installation

Door/ window work shall be installed adjusted and glazed by experienced workmen all in accordance with the manufacturer’s installation instructions and in full conformity with the approved shop drawings, samples and other submitted other data. Under no circumstances shall materials be installed on surfaces that contain condensation, dirt, grease or other foreign encountered materials that would hinder or prevent proper installation and functioning for the use intended. Door/ window work shall be carefully and accurately assembled with proper and approved provision for contraction and expansion and set in correct locations as per approved detailed shop drawings, all level, square, plumb and aligned with other work. All joints between framing and structural building shall be sealed in order to be watertight and whether proof and to satisfy all other requirements of the Project Manager. Frames shall be designed and manufactured with a maximum 2.5mm tolerance around the opening in the structure. These joints are to be finished by applying an approved sealant into a polystyrene foam backing strip. All Door / window Works are to be fully protected for the duration of the contract from damage by pother trades. The Engineer shall approve the method of protection. If for any reason final finishes become scratched, abraded or damaged during transport, delivery storage or erection, it shall be the Contractor’s responsibility to remove or repair those defective areas or components as directed and to the complete satisfaction of the Project Manager. Repair work shall be identical to the manufacturer’s applied finish with regard to gloss, finish and visual appearance. Field touch up of painted doors/ or windows is permitted only with the written permission of the Engineer. Where touch up is not an authorized means of repair the damaged materials must be replaced by new. Upon completion of work all protective coverings from all exposed surfaces shall be removed. All surfaces shall be cleaned using soap or detergents as recommended by the door / window manufacturers to remove sealants, discoloration and any other foreign material. Defection of any type determined by the Engineer shall be repaired at the Contractor’s expense. Extreme care shall be taken when cleaning the exterior portion to protect all other adjacent

works.

12.6 Sealing joints The Contractor shall ensure that joints are dry and remove all loose material, dust and

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grease. Joints shall be prepared in accordance with sealant manufacturer’s recommendations using recommended solvents and primers where necessary. Adjoining surfaces which would be impossible to clean if smeared with sealant shall be

masked. Backing strip shall be inserted in all joints to be pointed with sealant. When using backing strips, the Contractor shall not leave gaps and shall not reduce depth of joint for sealant to less than the minimum recommended by the manufacturer. Cavities shall be filled and jointed with sealant in accordance with the manufacturer’s recommendations. Sealant shall be tooled to form a smooth flat bed. Excess sealant shall be removed from adjoining surfaces using cleaning materials recommended by the sealant manufacture, and shall be left clean.

12.7 Tolerances The accepted tolerances for various components are to be as follows

a. Inside width of frame 3mm Maximum b. Inside height of frame 3mm Maximum c. Depth of frame 2mm Maximum d. Opposite side, Inside distance 2mm Maximum

12.8 Tests for acceptance the peformance

Contractors shall provide manufacturers test certificates for the following any field assembled component shall be tested for these properties if instructed by the Consultant following acceptable test method;

a. Strength(resistance to wind pressure and other forces applied in use) tested in

accordance with b. Air tightness or ability to cut out drafts – tested in accordance with c. Water – tightness against rain or dew – tested in accordance with d. Sound arresting effect to (shut off noise from outside as well as inside) – tested in

accordance with Measurement and Payment 12.9 Glass installation

Glass to comply with BS 952 and clean cut, without edge faults and free from defects. clear float glass for general purpose in various thicknesses. No flat drawn sheets shall be used.

Glass selection and installation shall be carried out as per BS 6262 :1982 or Australian Standards AS 2208 : 1996 and AS 1288 : 2006 and all amendments to date of tender. The glass thickness unless otherwise specified shall be at least 6mm thick and designed according to AS 1288:2006, NZS 4223:1999, BS 6206:1981

The glass is to be delivered to the site with adequate protection to prevent damage and where possible shall be fixed in position immediately after delivery. When fixed the Contractor shall take all necessary precautions to prevent damage during succeeding building operations and shall be entirely responsible for the replacement of any broken or damaged glass at his own cost.

The Contractor shall be solely responsible for determining the exact sizes of glass required, including a tolerance of 2mm to each edge and he is recommended to check the necessary dimensions on site.

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No glazing shall carried out until rebates have been painted with primer. Glazing beads as applicable shall also be primed before fixing.

All mastic is to be neatly struck off to agree exactly with site lines inside and out.

Glass apertures in timber doors shall be bedded in chamois leather glazing strip, black ribbon velvet or P.V.C glazing strip to the approval of the Engineer. Glazed Paneled Partitions – The frames shall be properly machined to permit easy assembly and to form whether – tight joints when caulked. The top panel/s, as shown in drawings shall be properly weather stripped and designed for virgin vinyl channel type glazing. The Bottom Panel shall consist of PYC Laminated Gypsum Board panels, on both sides, inserted with special snap-in aluminium bead after the partition is assembled.

Glazing for doors and windows shall be of as specified in sub Section 700.2.16 thickness and of approved quality and shall conform to specification of glazing. Fixing for glazing shall be done with aluminium Snap-On beading as per detail drawing and instructions. Necessary continuous rubber gaskets of approved make shall be provided.

Required Characteristics

Wired glass for use in fire check doors shall be at least 6mm thick. Toughened glass shall be fully tempered with a surface compression of 69MPa. Heat Strengthened glass where applicable shall have a surface compress 24 MPa. Annealed Laminated Glass shall have a PVB interlayer of 0.38mm minimum and multiple

layers of PVB which shall be 2 ply, 3 ply or 4 ply as found suitable for the relevant application and safety level.

Sun control glass to be of Low Emissivity Type and meet the following performance criteria, and the hard coating surface glaze unit : Outdoor reflectance not exceeding 11%.

� U - Factor – Less than 0.89

(U-factor measures how well a product prevents heat from escaping. The rate of heat loss is indicated in terms of the U-factor (U-value) of a window assembly. U-Factor ratings generally fall between 0.20 and 1.20. The lower the U-value, the greater a window’s resistance to heat flow and the better its insulating value). Solar Heat Gain Coefficient – Less than –0. 59

Solar Heat Gain Coefficient (SHGC) measures how well a product blocks heat caused by sunlight. The SHGC is the fraction of incident solar radiation admitted through a window (both directly transmitted and absorbed) and subsequently released inward. SHGC is expressed as a number between 0 and 1. The lower a window’s solar heat gain coefficient, the less solar heat it transmits in the house. Visible Transmittance – (Engineer shall specify)

Visible Transmittance (VT) measures how much light comes through a product. The visible transmittance is a optical property that indicates the amount of visible light transmitted. VT is expressed as a number between 0 and 1. The higher the VT, the more light is transmitted.

� Air Leakage* Less than 0.2

Air Leakage (AL) is indicated by an air leakage rating expressed as the equivalent

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cubic feet of air passing through a square foot of window area (cfm/sq ft). Heat loss and gain occur by infiltration through cracks in the window assembly. The lower the AL, the less air will pass through cracks in the window assembly.

� Condensation Resistance* More than 51

Condensation Resistance (CR) measures the ability of a product to resist the formation of condensation on the interior surface of that product. The higher the CR rating, the better that product is at resisting condensation formation. While this rating cannot predict condensation, it can provide a

credible method of comparing the potential of various products for condensation formation. CR is expressed as a number between 0 and 100. Protection Before and after installation All aluminium sections shall not be stored in a manner where they rub or slide against each other or against other metallic surfaces. All components where possible shall be delivered to the site in individual plastic wrapping, stout papers, cardboard or other protective covering which shall not be allowed to get damp.

The contractor shall provide cover on all exposed aluminium surfaces, etc, during transportation and installation against damage by contaminated moisture, staining, wet cement, wet plaster and other injuries, including provision of proper storage sheds for materials delivered to site.

Any aluminium unit which is damaged in any way during transportation, before or after installation shall be replaced by the Contractor at his expense. All the aluminium extrusion sizes for the windows and curtain walls should be selected to stand the wind pressure in each level, and prior approval should be obtain from the Engineer before fixing. 13 ROOFING 13.1 Scope

This section deals with the roofing system including guttering Design Considerations

Wind Suction loaded: Calculate in accordance with CP 3: chapter5: Part2, making due allowance for any internal pressure

� Basic wind speed: 49m/sec

� Topography factory S1 : 1.0

� Ground roughness, building size and height factor (S2):as determined from CP3:

Chapter5:part2, Table3.

� Statistical factor (S3):1.0

Imposed load other than wind and maintenance load , 1.5KN/m2 Concentrated on a 300mm2 Whichever produces the greater stress. Maintenance point load : 0.9KN concentrated on any 125mm.

Dead load: allow for self weight of sheeting. Roof pitch : as indicated on drawings. Distance between not less than 900mm or as indicated on drawings.

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13.2 Roof Cladding

The meal sheeting is to be zinc Alume alloy sheets made from cold rolled coil conforming to Australian standard AS:1397 or the latest revision thereof and having a Grad 550 with a minimum yield strength of555 N/mm

2. Unless specified otherwise, the sheets

shall have a nominal total coated thickness of 0.47mm and be clean and free from defects. The sheets shall be hot dipped coated with 55% aluminum and zinc alloy and silicone having a coating class of AZ 150 with a minimum coating mass of 150 grams/m2 in total both surfaces. Structural support: as per drawings. Fastening: No.12-14x45mm hexagonal head self drilling and tapping screw seal. Mild steel screws shall not be used. End laps: of not less than 150mm and side laps of one corrugating shall be provided where the pitch of the roof is not less than 15 degrees. In the case where the pitch is less than 15 degrees the end laps shall be a minimum 225mm. An approved sealant is to be used at the laps for pitches below 7 degrees. Where the sheeting rests on GI Lipped Channel purlins the sheets should be painted with two coats of a Zinc Chromate or Barium Chromate based paint. Alternatively, the painting may be done with two coats of bitumen paint or with two coats of Zinc rich paint. The overhangs at the eaves for corrugated profile shall not exceed 200mm in the case of un-stiffened and 350mm in the case of stiffened. The sheets shall be so fixed as to close on the ridges and hips. The Contractor is to submit colour samples of the roof sheeting. The Employer shall determine the final EPDM washers. The fasteners shall not be over-tightened and shall only be driven until the sealer grips onto the sheet.

Cutting and Drilling

Cuts sheets accurately with clean, true lines and o distortion with a power saw with abrasive cutting disc. Cut openings in sheet for out lets, vent pipes, flues etc, to the minimum size necessary. Reinforce edges of openings with structural members. Drill all holes where self fastening screws not used. Position at regular intervals in straight lines. Holes for primary fastenings to be 1.5mm larger than the diameter of fastening unless self drilling type is used. Remove burrs, drilling swarf, lubricant, dust and any other foreign matter before finally fixing sheets into position. Direction of Laying: Lay sheets with exposed joints of side lap away from prevailing wind. End Laps to be fully supported.

Sealant

Install to manufactures recommendation. Position in straight, unbroken lines parallel to edges of sheets. Placed into corrugations. Do not allow to sag into position. Ensure continuity and effectiveness of seal, especially at corners of sheets.

Do not over compress. Fittings and Features

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Profile Fillers : use where specified and wherever necessary to close off corrugation cavities from the outside and inside of the building. Position on the line of, or above, fastening and ensuring a tight fit and leaving no gaps. Where sealed laps are specified bed profile fillers in sealant on top and bottom surface, but do not obstruct channels for ventilation or condensation drainage. Gutter The gutter is to be TCT colour bonded Zn/Al. The Contractor is to submit samples, material specification and manufactures data sheet to the Consultant for approval prior to purchasing. Colour options are also to be submitted to the Consultant. The decision on colour shall be made by the Employer. Ensure that gutters are fully supported at each joint and at intermediate position not more than 900m apart. Fix with spigot ends up the slope and make all the joints fully watertight. Position sheeting to leave a clear width across the gutter of not less than 230m. Roof Insulation The building roof space is to be insulated using Sisilation (or Macfoil) 8mm thick heat insulation sheet (or approved equivalent) . The insulation is to be inserted between the roof sheeting and purlins and shall be supported by a G.I. wire mesh. The rate shall include all items required for the installation including materials, G.I. wire mesh support net, labour and fixing.

14.0 PORTABLE FIRE EXTINGUISHERS

14.1 GENERAL

Portable fire extinguishers shall be of the re-chargeable, metal-bodied type containing and

extinguishing agent expelled by the action of internal pressure. They shall be manufactured to BS EN

3 or equivalent and approved by the Fire Service Department of the Colombo Municipal Council, Sri

Lanka.

The extinguishers shall be Colour Coded to BS for easy identification and shall be fitted with a visual

"discharged" indicator to prevent accidental use of an empty cylinder.

The extinguisher shall be operated by piercing, opening and/or breaking a sealing device and thus

releasing the contents. The method of operation shall be readily apparent. It shall not be necessary

for any movement of the actuating mechanism or mechanisms to be repeated in order to initiate

discharge of the extinguisher.

All portable Fire Extinguishers shall comply with BS Codes and extinguish shall be released by means

of a lever-operated valve provided with a safety pin. The extinguisher shall be capable of controlled

partial discharge. All extinguishers marked with clear instructions for use in the English language.

The quantity, types, sizes and locations of the extinguishers to be provided shall be in accordance with

the Drawings.

The following portable fire extinguishers shall be installed in each floor as shown in the

drawings.

� kg CO2 fire extinguisher fully charged with metal bracket fixed on to the wall.

� 9 litre water CO2 fire extinguisher fully charged with metal bracket fixed on to the wall.

14.2 MOUNTING

All internal extinguishers shall be wall mounted and attached in a manner affording quick

release from the supporting bracket. They shall be installed so that the top of the

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extinguisher is not more than 1.5m above the floor and in no case shall the clearance between

the bottom of the extinguishers and the floor be less than 1m. The extinguishers shall be

positioned so that the instructions for operation face outward.

11115555.0.0.0.0 TESTING AND COMMISSIONINGTESTING AND COMMISSIONINGTESTING AND COMMISSIONINGTESTING AND COMMISSIONING

On completion of the works all systems installed shall be tested in the presence of Engineer's representatives and other officials of the client. The contractor shall give adequate notice to the Engineer of the proposed dates for testing and shall provide all facilities required such as personnel, instruments and equipment, access ladders for this purpose. The contractor shall rectify all works not confirming to the required specifications and the tests shall be repeated after remedial measures at his cost.

16.0 MEASUREMENTS Bidders are to note that the measurements are taken absolutely net unless otherwise

stated and they must therefore allow in their prices for wastages extra excavations as working spaces etc. throughout even though not specially mentioned.