KALILUNI FARMERS CO-PERATIVE SOCIETY LTD CONSTRUCTION OF SYOKIMAU COFFEE FACTORY
2
Table of Contents                                          INVITATION FOR BIDS (IFB)VOLUME 1 STANDARD BIDDING REQUEREMENTS...
4                                                              VOLUME 1                                  STANDARD BIDDING ...
Section I. Instructions to bidders (ITB)                                                            Table of Contents1.Sco...
6                                                                        Section I. Instructions to bidders               ...
Section I. Instructions to bidders                                                                        76. Site Visit  ...
8                                                                              Section I. Instructions to bidders11. Bid P...
Section I. Instructions to bidders                                                                             913. Bid Va...
10                                                                           Section I. Instructions to bidders       15.3...
Section I. Instructions to bidders                                                                      11        19.4    ...
12                                                                        Section I. Instructions to bidders             (...
Section I. Instructions to bidders                                                                         1327. Award of ...
14                                                                       Section I. Instructions to bidders            pro...
Section II. Conditions of contract                           15                        Section II. Conditions of contract
16                                                       Section II. Conditions of contract                               ...
Section III. Standard forms                                                                                               ...
18                                                                           Section III. Standard forms                  ...
Section III. Standard forms                                                                     191.4     Qualifications a...
20                                                                            Section III. Standard forms2.    Joint Ventu...
Section III. Standard forms                                                                              21               ...
22                                                                             Section III. Standard forms                ...
23                                                     VOLUME 2                          SPECIFIC BIDDING REQUIREMENTS    ...
24                                                                              Section IV. Bid data sheet                ...
Section IV. Bid data sheet                                                                         25(16.2b)         The n...
26                                                                                   Section V. Contract data             ...
Section V. Contract data                                                                               27                (...
28   Section V. Contract data
29                               Section VI. SpecificationsTECHNICAL SPECIFICATIONGENERAL    Description of the works     ...
30                                                                     Section V. Contract data      (b)   Such other draw...
31 The contractor shall designate within his site organization competent staff whose responsibility shall be to ensure goo...
32                                                                      Section V. Contract data     Site investigations  ...
33      Water supply       The contractor will arrange to provide water for use in the camps and on the works.       The C...
34                                                                       Section V. Contract data      All materials, comm...
35 When a portion of excavation contains 75% or more by volume of boulders of this order such portion shall be considered ...
36                                                                        Section V. Contract data     Compaction of earth...
37the modifications to the preambles caused thereby. Any additional cost that may becaused by the use of the rapid hardeni...
38                                                                       Section V. Contract data     Coarse aggregate sha...
39Finishes       General The Contractor will be required from an early stage in the contract to prepare samples, for the a...
40                                                                       Section V. Contract data      after an inspection...
41All formwork shall be of sufficient thickness and with joints close enough to prevent undue       leakage of liquid from...
42                                                                           Section V. Contract data        All formwork ...
43Concrete mixing and placing The concrete shall be mixed only in approved power-driven mixers of a type and capacity suit...
Kaliluni coffee factory mmm
Kaliluni coffee factory mmm
Kaliluni coffee factory mmm
Kaliluni coffee factory mmm
Kaliluni coffee factory mmm
Kaliluni coffee factory mmm
Kaliluni coffee factory mmm
Kaliluni coffee factory mmm
Kaliluni coffee factory mmm
Kaliluni coffee factory mmm
Kaliluni coffee factory mmm
Kaliluni coffee factory mmm
Kaliluni coffee factory mmm
Kaliluni coffee factory mmm
Kaliluni coffee factory mmm
Kaliluni coffee factory mmm
Kaliluni coffee factory mmm
Kaliluni coffee factory mmm
Kaliluni coffee factory mmm
Kaliluni coffee factory mmm
Kaliluni coffee factory mmm
Kaliluni coffee factory mmm
Kaliluni coffee factory mmm
Kaliluni coffee factory mmm
Kaliluni coffee factory mmm
Kaliluni coffee factory mmm
Kaliluni coffee factory mmm
Kaliluni coffee factory mmm
Kaliluni coffee factory mmm
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Kaliluni coffee factory mmm

  1. 1. KALILUNI FARMERS CO-PERATIVE SOCIETY LTD CONSTRUCTION OF SYOKIMAU COFFEE FACTORY
  2. 2. 2
  3. 3. Table of Contents INVITATION FOR BIDS (IFB)VOLUME 1 STANDARD BIDDING REQUEREMENTSSection I. Instructions to bidders.............................................................................................................6Section II. Conditions of contract ........................................................................................................15Section III . Standard forms...................................................................................................................17 Qualification information............................................................................................18 Bid security (bank guarantee).....................................................................................21 Bank guarantee for advance payment........................................................................22Section IV. Bid data sheet......................................................................................................................24Section V. Contract data .......................................................................................................................26Section VI. Specifications......................................................................................................................29Section VII. Drawings............................................................................................................................71Section VIII. Bill of quantities...............................................................................................................72
  4. 4. 4 VOLUME 1 STANDARD BIDDING REQUIREMENTS Table of ContentsSection I. Instructions to bidders.............................................................................................................6Section II. Conditions of contract ........................................................................................................15Section III . Standard forms...................................................................................................................17 Qualification information............................................................................................18 Bid security (bank guarantee).....................................................................................21 Bank guarantee for advance payment........................................................................22Section IV. Bid data sheet......................................................................................................................24Section V. Contract data .......................................................................................................................26Section VI. Specifications......................................................................................................................29Section VII. Drawings............................................................................................................................71Section VIII. Bill of quantities...............................................................................................................72
  5. 5. Section I. Instructions to bidders (ITB) Table of Contents1.Scope of Bid62.Eligible Bidders.....................................................................................................................................63.Qualification of Bidder.........................................................................................................................64.Bidder’s Bid 65.Cost of Bidding.....................................................................................................................................66.Site Visit 77.Content of Bidding Documents.............................................................................................................78.Clarification of Bidding Documents.....................................................................................................79.Language of Bid....................................................................................................................................710.Documents Comprising the Bid..........................................................................................................711.Bid Prices 812.Currency of Bid and Payment.............................................................................................................813.Bid Validity.........................................................................................................................................914.Bid Security.........................................................................................................................................915.Format and Signing of Bid..................................................................................................................916.Sealing and Marking of Bids.............................................................................................................1017.Deadline for Submission of Bids......................................................................................................1018.Late Bids 1019.Modification and Withdrawal of Bids...............................................................................................1020.Bid Opening......................................................................................................................................1121.Process to be Confidential.................................................................................................................1122.Clarification of Bids..........................................................................................................................1123.Examination of Bids and Determination of Responsiveness............................................................1124.Correction of Errors..........................................................................................................................1225.Currency for Bid Evaluation.............................................................................................................1226.Evaluation and Comparison of Bids.................................................................................................1227.Award of Contract.............................................................................................................................1328.Employers Right to Accept any Bid to Reject any or all Bids..........................................................1329.Notification of Award and Signing of Agreement............................................................................1330.Advance Payment .............................................................................................................................1331.Fraud and Corruption........................................................................................................................13
  6. 6. 6 Section I. Instructions to bidders Section I. Instructions to bidders1. Scope of Bid 1.1 The Employer as defined in the Contract Data, invites bids for the construction of Works, as described in the Contract Data. The name and identification number of the Contract is provided in the Contract Data. 1.2 The successful Bidder will be expected to complete the Works by the required completion date specified in the Contract Data.2. Eligible Bidders 2.1 This Invitation for Bids is open to all bidders from eligible countries as defined in the ADB Rules of Procedure for Procurement of Goods and Works. Any materials, equipment, and services to be used in the performance of the Contract shall have their origin in eligible source countries. 2.2 Government owned enterprises in the Borrower’s country may participate only if they can establish that they (i) are legally and financially autonomous; and (ii) operate under commercial law. No dependent agency of the Borrower or the Sub-borrower under a Bank financed project shall be permitted to bid or submit a proposal for the procurement of goods or works under the project.3. Qualification of Bidder 3.1 All bidders shall provide in Section III - Qualification Information, a preliminary description of the proposed work method and schedule, including drawings and charts, as necessary. 3.2 To qualify for award of the Contract, bidders shall meet the minimum qualifying criteria specified in the Bid Data Sheet.4. Bidder’s Bid 4.1 Each Bidder shall submit only one Bid, either individually or as a partner in a joint venture. A Bidder who submits or participates in more than one Bid will be disqualified. 4.2 Partners in a joint venture shall be jointly and severally liable for the execution of the Contract.5. Cost of Bidding 5.1 The Bidder shall bear all costs associated with the preparation and submission of his Bid, and the Employer will in no case be responsible or liable for those costs.
  7. 7. Section I. Instructions to bidders 76. Site Visit 6.1 The Bidder, at the Bidder’s own responsibility and risk, is encouraged to visit and examine the Site of Works and its surroundings and obtain all information that may be necessary for preparing the Bid and entering into a contract for construction of the Works. The costs of visiting the Site shall be at the Bidder’s own expense.7. Content of Bidding Documents 7.1 The set of bidding documents comprises the documents listed in the table below and addenda issued in accordance with Clause 8: Volume 1 Section I Instructions to Bidders Section II Conditions of Contract Section III Standard Forms: • Qualification Information • Bid Security (Bank Guarantee) • Bank Guarantee for Advance Payment Volume 2 Section IV Bid Data Sheet Section V Contract Data - Amendments to Appendix to Contract Section VI Specifications Section VII Drawings Section VIII Bill of Quantities or Activity Schedule for Lump Sum Contracts.8. Clarification of Bidding Documents 8.1 A prospective bidder may request the Employer in writing for clarifications of the bidding documents. The Employer shall respond to such requests if he receives them 15 days prior to the deadline for submission of bids. The Employer shall also send copies of his response to all those bidders who have obtained the bidding documents, without identifying the originator of the request. Similarly, prior to the deadline for submission of bids, the Employer may modify the bidding documents by issuing addenda.9. Language of Bid 9.1 All documents relating to the Bid and Contract shall be in English.10. Documents Comprising the Bid 10.1 The Bid submitted by the Bidder shall comprise the following: (a) The Bid (in the format indicated in Section II); (b) Priced Bill of Quantities; (c) Qualification Information and Documents.
  8. 8. 8 Section I. Instructions to bidders11. Bid Prices 11.1 The Contract shall be for the whole Works, as described in Sub-Clause 1.1, based on the priced Bill of Quantities submitted by the Bidder. 11.2 The Bidder shall fill in rates and prices for all items of the Works described in the Bill of Quantities. Items for which no rate or price is entered by the Bidder will not be paid for by the Employer when executed and shall be deemed covered by the other rates and prices in the Bill of Quantities. 11.3 All duties, taxes, and other levies payable by the Contractor under the Contract, or for any other cause, as of the date 15 days prior to the deadline for submission of bids, shall be included in the rates, prices, and total Bid price submitted by the Bidder. 11.4 The rates and prices quoted by the Bidder shall be subject to adjustment during the performance of the Contract if provided for in the Bid Data Sheet and the provisions of Clause 11 of the Conditions of Contract. The Bidder shall submit with the Bid all the information required under the Contract Data.12. Currency of Bid and Payment 12.1 The unit rates and prices shall be quoted by the Bidder entirely in the currency of the Employer’s country as specified in the Contract Data. Foreign currency requirements shall be indicated as a percentage of the Bid price (excluding provisional sums 1) and shall be payable at the option of the Bidder in (a) the currency of the Bidder’s home country or (b) a currency widely used in international trade, always provided that a Bidder expecting expenditures in currency(ies) other than those stated in (a) or (b) above for portions of the foreign currency requirements, and wishing to be paid accordingly, shall indicate the relevant currencies and percentages in the Bid. 12.2 The rates of exchange to be used by the Bidder in arriving at the local currency equivalent and the percentage(s) mentioned in Sub-Clause 12.1 above shall be the selling rates for similar transactions established by the authority specified in the Bid Data Sheet prevailing on the date 15 days prior to the latest deadline for submission of bids. These exchange rates shall apply for all payments so that no exchange risk will be borne by the Bidder. If the Bidder uses other rates of exchange, the provisions of Clause 25.1 shall apply. In any case, payments will be computed using the rates quoted in the Bid. 12.3 Bidders shall indicate details of their expected foreign currency requirements in the Bid. 12.4 Bidders may be required by the Employer to clarify their foreign currency requirements and to substantiate that the amounts included in the rates and prices and in the Contract Data are reasonable and responsive to Sub-Clause 12.1.1 Provisional sums are monetary sums specified by the Employer in the Bill ofQuantities, to be used at his discretion for nominated subcontractors and otherspecified purposes.
  9. 9. Section I. Instructions to bidders 913. Bid Validity 13.1 Bids shall remain valid for the period specified in the Bid Data Sheet. The Employer may request that the bidders extend the period of validity for a specified additional period. The request and the bidders’ responses shall be made in writing or by cable or by a fax. A Bidder may refuse the request in which case he may withdraw his bid without penalty. A Bidder agreeing to the request will not be required or permitted to otherwise modify the Bid.14. Bid Security 14.1 The Bidder shall furnish, as part of the Bid, a Bid Security in local currency or in a freely convertible currency, in the amount specified in the Bid Data Sheet. 14.2 The Bid Security shall, at the Bidder’s option, be in the form of a certified check, bank draft, letter of credit, or a bank guarantee from a reputable bank located in the country of the Employer or in any eligible country abroad. The format of the Bid Security should be in accordance with the form of Bid Security included in Section III. Bid Security shall be valid for 28 days beyond the validity of the Bid. 14.3 Any bid not accompanied by an acceptable Bid Security shall be rejected by the Employer. The Bid Security of a joint venture must define as “bidder” all joint venture partners and list them in the following manner: a joint venture consisting of “Chairman,” “vice chairman,” and “____Engineer”. 14.4 The Bid Security of the successful Bidder will be discharged when the Bidder has signed the Agreement. The Bid Security of unsuccessful bidders will be returned within one week after concluding the contract. 14.5 The Bid Security may be forfeited: (a) if the Bidder withdraws the Bid after Bid opening during the period of Bid validity; (b) if the Bidder does not accept the correction of the Bid price, pursuant to Clause 24; or (c) in the case of a successful Bidder, if the Bidder fails within the specified time limit to sign the Agreement.15. Format and Signing of Bid 15.1 The Bidder shall prepare one original of the documents comprising the Bid as described in Clause 10 of these Instructions to Bidders, with the Form of Bid, and clearly marked "ORIGINAL". In addition, the Bidder shall submit copies of the Bid, in the number specified in the Bid Data Sheet, and clearly marked as "COPIES". In the event of discrepancy between them, the original shall prevail. 15.2 The original and all copies of the Bid shall be typed or written in indelible ink and shall be signed by a person or persons duly authorized to sign on behalf of the Bidder. All pages of the Bid where entries or amendments have been made shall be initialed by the person or persons signing the Bid.
  10. 10. 10 Section I. Instructions to bidders 15.3 The Bid shall contain no alterations or additions, except those to comply with instructions issued by the Employer, or as necessary to correct errors made by the Bidder, in which case, such corrections shall be initialed by the person or persons signing the Bid.16. Sealing and Marking of Bids 16.1 The Bidder shall seal the original and all copies of the Bid in two inner envelopes and one outer envelope, duly marking the inner envelopes as “ORIGINAL” and “COPIES”. 16.2 The inner and outer envelopes shall: (a) be addressed to the Employer at the address provided in the Bid Data Sheet; (b) bear the name and identification number of the Contract as defined in the Bidding and Contract Data; and (c) provide a warning not to open before the specified time and date for Bid opening as defined in the Bid Data Sheet. 16.3 In addition to the identification required in Sub-Clause 15.2, the inner envelopes shall indicate the name and address of the Bidder to enable the Bid to be returned unopened in case it is declared late, pursuant to Clause 17.1. 16.4 If the outer envelope is not sealed and marked as above, the Employer will assume no responsibility for the misplacement or premature opening of the Bid.17. Deadline for Submission of Bids 17.1 Bids shall be delivered to the Employer at the address specified above no later than the time and date specified in the Bid Data Sheet. 17.2 The Employer may extend the deadline for submission of bids by issuing an amendment in accordance with Clause 8, in which case all rights and obligations of the Employer and the bidders previously subject to the original deadline will then be subject to the new deadline.18. Late Bids 18.1 Any Bid received by the Employer after the deadline prescribed in Clause 17 will be returned unopened to the Bidder.19. Modification and Withdrawal of Bids 19.1 Bidders may modify or withdraw their bids by giving notice in writing before the deadline prescribed in Clause 17. 19.2 Each Bidder’s modification or withdrawal notice shall be prepared, sealed, marked, and delivered in accordance with Clauses 16 and 17, with the outer and inner envelopes additionally marked “MODIFICATION” or “WITHDRAWAL,” as appropriate. 19.3 No Bid may be modified after the deadline for submission of Bids.
  11. 11. Section I. Instructions to bidders 11 19.4 Withdrawal of a Bid between the deadline for submission of bids and the expiration of the period of Bid validity specified in the Bid Data Sheet or as extended pursuant to Sub- Clause 17.2 will result in the forfeiture of the Bid Security pursuant to Clause 14. 19.5 Bidders may only offer discounts to, or otherwise modify the prices of their bids by submitting Bid modifications in accordance with this clause, or included in the original Bid submission. Discounts or any modification to bid prices not submitted in accordance with Clause 19 shall be rejected.20. Bid Opening 15.1 The Employer will open the bids, including modifications in the presence of bidders representatives who choose to attend at the time and in the place specified in the Bid Data Sheet. The bidders’ names, the Bid prices, the total amount of each Bid, any discounts, the presence or absence of Bid Security, bid modifications and withdrawals will be announced by the Employer at the opening. 15.2 Bids or modifications that are not opened and read out at bid opening shall not be considered further for evaluation, irrespective of the circumstances. In particular, any discount offered by a Bidder which is not read out at bid opening shall not be considered further.21. Process to be Confidential 21.1 Information relating to the examination, clarification, evaluation, and comparison of bids and recommendations for the award of a contract shall not be disclosed until the award to the successful Bidder has been announced. Any effort by a Bidder to influence the Employer’s processing of bids or award decisions may result in the rejection of his Bid.22. Clarification of Bids 22.1 To assist in the examination, evaluation, and comparison of bids, the Employer may, at the Employer’s discretion, ask any Bidder for clarification of the Bidder’s Bid. The request for clarification and the response shall be in writing or by cable, telex, or facsimile, but no change in the price or substance of the Bid shall be sought, offered, or permitted except as required to confirm the correction of arithmetic errors discovered by the Employer in the evaluation of the bids in accordance with Clause 24.23. Examination of Bids and Determination of Responsiveness 23.1 Prior to the detailed evaluation of bids, the Employer will determine whether each bid is substantially responsive to the requirements of the bidding documents. A substantially responsive Bid is one, which conforms to all the terms, conditions and specifications of the bidding documents, without material deviation or reservation. A material deviation or reservation is one: (a) which affects in any substantial way the scope, quality, or performance of the Works; or (b) which limits in any substantial way, inconsistent with the documents, the Employer’s rights or the Bidder’s obligations under the Contract; or
  12. 12. 12 Section I. Instructions to bidders (c) whose rectification would affect unfairly the competitive position of other bidders presenting substantially responsive bids? 23.2 If a Bid is not substantially responsive, it will be rejected by the Employer, and may not subsequently be made responsive by correction or withdrawal of the nonconforming deviation or reservation.24. Correction of Errors 24.1 Bids determined to be substantially responsive will be checked by the Employer for any arithmetic errors. Errors will be corrected by the Employer as follows: (a) where there is a discrepancy between the amounts in figures and in words, the amount in words will govern; (b) where there is a discrepancy between the unit rate and the line item total resulting from multiplying the unit rate by the quantity, the unit rate as quoted will govern; and (c) if the Bidder refuses to accept the correction his Bid will be rejected, and the Bid Security will be forfeited in accordance with Clause 14.25. Currency for Bid Evaluation 25.1 Bids will be evaluated as quoted in the currency of the Employer’s country as defined in the Contract Data in accordance with Sub-Clause 12.1, unless a Bidder has used different exchange rates than those prescribed in Sub-Clause 12.2, in which case the Bid will be first converted into the amounts payable in different currencies using the rates quoted in the Bid and then reconverted to the Employer’s currency using the exchange rates prescribed in Sub-Clause 12.2.26. Evaluation and Comparison of Bids 26.1 The Employer will evaluate and compare only the bids determined to be substantially responsive in accordance with Clause 24. 26.2 In evaluating the bids, the Employer will determine for each Bid the evaluated Bid price by adjusting the Bid price as follows: (a) making any correction for errors pursuant to Clause 24; (b) excluding provisional sums and the provision, if any, for contingencies in the Bill of Quantities, but including Daywork, where priced competitively; and (c) making appropriate adjustments to reflect discounts or other price modifications offered in accordance with Sub-Clause 19.5. 26.3 The Employer may waive any minor informality or non-conformity, which does not constitute a material deviation, provided such waiver does not prejudice or affect the relative standing of any Bidder. Variations, deviations, and alternative offers and other factors, which are in excess of the requirements of the bidding documents or otherwise result in unsolicited benefits for the Employer will not be taken into account in Bid evaluation.
  13. 13. Section I. Instructions to bidders 1327. Award of Contract 27.1 Subject to Clause 28, the Employer will award the Contract to the Bidder whose Bid has been determined to be substantially responsive to the bidding documents and who has offered the lowest evaluated Bid price, provided that such Bidder has been qualified in accordance with the provisions of Clause 3.28. Employers Right to Accept any Bid to Reject any or all Bids 28.1 Notwithstanding Clause 27, the Employer reserves the right to accept or reject any Bid, and to cancel the bidding process and reject all bids, at any time prior to the award of Contract, without thereby incurring any liability to the affected Bidder or bidders or any obligation to inform the affected Bidder or bidders of the grounds for the Employer’s action.29. Notification of Award and Signing of Agreement 29.1 The Bidder whose Bid has been accepted will be notified of the award by the Employer prior to expiration of the Bid validity period by registered letter. This letter (hereinafter and in the Conditions of Contract called the "Letter of Acceptance") will state the sum that the Employer will pay the Contractor in consideration of the execution, completion, and maintenance of the Works by the Contractor as prescribed by the Contract (hereinafter and in the Contract called the "Contract Price"). 29.2 The notification of award will constitute the formation of the Contract subject to the Bidder signing the Agreement in accordance with Sub-Clause 29.3. 29.3 The Employer will send the successful Bidder the Agreement form provided in the bidding documents incorporating all agreements between the Employer and the successful Bidder. It will be sent to the successful bidder within 15 days following the notification of award. Within 15 days of receipt, the successful Bidder will sign the Agreement and deliver it to the Employer. 29.4 Upon the receipt of the signed Agreement from the Bidder, the Employer will, within one week, notify the other bidders that their bids have been unsuccessful.30. Advance Payment 30.1 The Employer will provide an Advance Payment as stipulated in the Conditions of Contract, subject to a maximum amount, as stated in the Bid Data Sheet. The Advance Payment request shall be accompanied by an Advance Payment Security (Guarantee) in the form provided in Section III. For the purpose of receiving the Advance Payment, the Bidder shall make and estimate of, and include in its Bid, the expenses that will be incurred in order to commence work. These expenses will relate to the purchase of equipment, machinery, materials, and on the engagement of labour during the first month beginning with the date of the Employer’s “Notice to Proceed” as specified in the Contract Data.31. Fraud and Corruption 31.1 It is the Bank’s policy to require Borrowers (including beneficiaries of Bank loans and grants), as well as bidders/ suppliers/ contractors/ concessionaires under Bank-financed
  14. 14. 14 Section I. Instructions to bidders projects, programmes and studies, to observe the highest standards of ethics during the procurement and the execution of contracts under such projects, programmes and studies. In pursuance of this policy, the Bank requires that Borrowers shall include in bidding documents, provisions against corrupt practices. 31.2 The Bank defines, for the purposes of these provisions, the terms set forth below as follows: (a) “corrupt practice” means the offering, giving receiving or soliciting of any thing of value to influence the action of a public official in the procurement process or in contract execution, and includes, inter alia, bribery and extortion or coercion which involve threats of injury to person, property or reputation; and (b) “fraudulent practice” means a misrepresentation of facts in order to influence a procurement process or the execution of a contract to the detriment of the Borrower, and includes collusive practices among bidders or between bidders and Borrower (prior to or after bid submission) designed to establish bid prices at artificial, non-competitive levels. 31.3 The Bank will, following its own investigation and determination in accordance with its procedures: (a) reject a proposal for award if it determines that the bidder recommended for award has engaged in corrupt or fraudulent practices in competing for the contract in question; (b) cancel the portion of the loan or grant allocated to a contract for goods or works if it at any time determines that corrupt or fraudulent practices were engaged in by representatives of the Borrower or of a beneficiary of the Loan or Grant during the procurement or the execution of that contract; and (c) declare a firm ineligible, either indefinitely or for a stated period of time, to be awarded a Bank-financed contract if it at any time determines the firm has engaged in corrupt or fraudulent practices in competing for, or in executing, a Bank-financed contract. A firm declared ineligible by the Bank in accordance with this sub-paragraph shall be ineligible to be awarded a Bank-financed contract during the period of time determined by the Bank. 31.4 The Bank reserves the right, where a firm has been found by a national or international entity to have engaged in corrupt or fraudulent practice, to declare that such a firm is ineligible, for a stated period of time, to be awarded a Bank-financed contract. 31.5 The Bank will have the right to require that, in contracts financed by the Bank, a provision be included requiring suppliers and contractors to permit the Bank to inspect their accounts and records relating to the performance of the contract and to have them audited by auditors appointed by the Bank.
  15. 15. Section II. Conditions of contract 15 Section II. Conditions of contract
  16. 16. 16 Section II. Conditions of contract Table of ContentsAgreement Offer (Form of Contractor’s Bid) Acceptance AppendixGeneral conditions
  17. 17. Section III. Standard forms 17 Section III . Standard forms Table of ContentsQualification information..................................................................................................................20Bid security (bank guarantee)............................................................................................................23Bank guarantee for advance payment................................................................................................24
  18. 18. 18 Section III. Standard forms Qualification information(The information below shall be filled in by Bidders in accordance with Clause 3 of the instructionsto Bidders (ITB). This information will be used during bid evaluation and will not be incorporatedin the Contract).1. Individual Bidders or Individual members of a Joint Venture1.1 Constitution or Legal Status of Bidder (attach copy): Place of Registration: __________________________________________ Principal Place of Business: ___________________________________________1.2 Work performed as prime Contractor on works of a similar nature and volume over the last two years. Also list details of work underway or committed, including expected completion date. Contract Name Name of Client Type of Work Performed Value of and Country and Contact Person and Year of Completion Contract1.3 Major items of Contractor’s Equipment proposed for carrying out the Works. List all information requested below. Item of Description, make, Condition (new, Owned, leased (from Equipment and Age (years) good, poor) and whom? or to be number available purchased (from whom)
  19. 19. Section III. Standard forms 191.4 Qualifications and experience of key personnel proposed for administration and execution of the Contract. Position Name Years of Years of Experience Experience in Proposed Position Project Manager1.5 Proposed subcontractors and firms involved. Sections of Value of Subcontractor Experience in The Work Subcontract (Name and Address) Similar Works1.6 Information on current litigation in which the Bidder is involved. Other Party(ies) Cause of Dispute Amount involved1.7 Proposed Work Programme (work method and schedule). Descriptions, drawings, charts, etc, as necessary, to comply with the requirements of the bidding documents.
  20. 20. 20 Section III. Standard forms2. Joint Venture Information2.1 The information listed in paragraphs 1.1 to 1.6 shall be provided for each partner in a Joint Venture.2.2 The information in 1.7 above shall be provided for the Joint Venture.2.3 Attach the power of attorney of the signatory(ies) of the Bid, authorizing signature of the Bid on behalf of the Joint Venture.2.4 Attach the Agreement among all partners of the Joint venture (and which is legally binding on all partners – Joint Venture Agreement), which shows that: (a) all partners shall be jointly and severally liable for the execution of the Contract in accordance with the Contract terms; (b) One of the partners will be nominated as being in charge, authorized to incur liabilities and receive instructions for and on behalf of any and all partners of the Joint Venture; and (c) the execution of the entire Contract, including payment, shall be done exclusively with the partner in charge.
  21. 21. Section III. Standard forms 21 Bid security (bank guarantee)Whereas, [name of Bidder] (hereinafter called “the Bidder”) has submitted his Bid dated [date] for theconstruction of [name of Contract] (hereinafter called “the Bid”).Know all people by these presents that We [name of Bank] of [name of country] having our registeredoffice at [address] (hereinafter called “the Bank”) are bound unto name of Employer] (hereinafter called“the Employer”) in the sum of [amount] 2 for which payment well and truly to be made to the saidEmployer, the Bank binds itself, its successors, and assigns by these presents.Sealed with the Common Seal of the said Bank this [day] day of [month], [year].The conditions of this obligation are: (1) If, after Bid opening, the Bidder withdraws his Bid during the period of Bid validity specified in the Form of Bid; or (2) If the Bidder having been notified of the acceptance of his Bid by the Employer during the period of Bid validity: (a) fails or refuses to execute the Form of Agreement in accordance with the Instructions to Bidders, if required; or (b) does not accept the correction of the Bid Price pursuant to Clause 25,we undertake to pay to the Employer up to the above amount upon receipt of his first written demand,without the Employer’s having to substantiate his demand, provided that in his demand the Employerwill note that the amount claimed by him is due to him owing to the occurrence of one or any of the threeconditions, specifying the occurred condition or conditions.This Guarantee will remain in force up to and including the date [number] days 3 after the deadline forsubmission of bids as such deadline is stated in the Instructions to Bidders or as it may be extended by theEmployer, notice of which extension(s) to the Bank is hereby waived. Any demand in respect of thisGuarantee should reach the Bank not later than the above date.Date _____________________ Signature of the Bank _____________________Witness Seal __________________________________[signature, name, and address]2 The Bidder should insert the amount of the Guarantee in words and figuresdenominated in the currency of the Employer’s country or an equivalent amount in afreely convertible currency. This figure should be the same as shown in Clause14.1 of the Instructions to Bidders.3 Usually 28 days after the end of the validity period of the Bid. The date shouldbe inserted by the Employer before the bidding documents are issued.
  22. 22. 22 Section III. Standard forms Bank guarantee for advance payment4To: [name and address of Employer] [name of Contract]Gentlemen:In accordance with the provisions of the Conditions of Contract, Clause 51 (“Advance Payment”) of theabove-mentioned Contract, [name and address of Contractor] (hereinafter called “the Contractor”) shalldeposit with [name of Employer] a Bank Guarantee to guarantee his proper and faithful performanceunder the said Clause of the Contract in an amount of [amount of Guarantee] [amount in words].5We, the [Bank or Financial Institution], as instructed by the Contractor, agree unconditionally andirrevocably to guarantee as primary obligator and not as Surety merely, the payment to [name ofEmployer] on his first demand without whatsoever right of objection on our part and without his firstclaim to the Contractor, in the amount not exceeding [amount of Guarantee] [amount in words].6We further agree that no change or addition to or other modification of the terms of the Contract or ofWorks to be performed thereunder or of any of the Contract documents which may be made between[name of Employer] and the Contractor, shall in any way release us from any liability under thisGuarantee, and we hereby waive notice of any such change, addition, or modification.This Guarantee shall remain valid and in full effect from the date of the advance payment under theContract until [name of Employer] receives full repayment of the same amount from the Contractor.Yours truly,Signature and seal:Name of Bank/Financial Institution:Address:Date:4 . Bidders should not complete the Advance Payment Security forms at this time.Only the successful Bidder will be required to provide Advance Payment Securitiesin accordance with the format provided herein5 An amount is to be inserted by the Bank or Financial Institution representing theamount of the Advance Payment, and denominated either in the currency(ies) of theAdvance Payment as specified in the Contract, or in a freely convertible currencyacceptable to the Employer.6 An amount is to be inserted by the Bank or Financial Institution representing theamount of the Advance Payment, and denominated either in the currency(ies) of theAdvance Payment as specified in the Contract, or in a freely convertible currencyacceptable to the Employer.
  23. 23. 23 VOLUME 2 SPECIFIC BIDDING REQUIREMENTS Table of ContentsSection IV. Bid data sheet.......................................................................................................26Section V. Contract data (amendments to appendix to contract).....................................28Section VI. Specifications........................................................................................................30Section VII. Drawings...............................................................................................................32Section VIII. Bill of quantities...................................................................................................33
  24. 24. 24 Section IV. Bid data sheet Section IV. Bid data sheetInstructions toBidders ClauseReference (ITB)(3.2) (a) The minimum required annual volume of construction work for the successful Bidder in any of the last two years shall be: Kenya Shillings Two Million Only (b) Experience as prime contractor in the construction of at least one work of a nature and complexity equivalent to the Works over the last 2 years (to comply with this requirement, works cited should be at least 70 percent complete) (d) The essential equipment to be made available for the Contract by the successful Bidder (proposals for timely acquisition or own, lease, hire, etc) shall be: 1. Vibrator 2. Concrete Mixer 3. Transport Vehicle/Truck (e) A Project Manager with two years experience in works of an equivalent nature and volume.(11.4) The Contract is not subject to price adjustment in accordance with Clause 11 of the Conditions of Contract.(12.1) The currency in which the prices shall be quoted shall be: Kenya Shillings (KES)(12.2) The authority for establishing the rates of exchange shall be Central Bank of Kenya(13.1) The period of bid validity shall be 120 days after the deadline for bid submission specified in this Bid Data Sheet.(14.1) The amount of Bid Security shall be KES 20,000 or an equivalent amount in a freely convertible currency.(15.1) The number of copies of the Bid to be completed and returned shall be: Two(16.2a) The Employers address for the purpose of Bid submission is: KALILUNI FARMERS CO-PERATIVE SOCIETY LTD P.O BOX 292-090100 MACHAKOS
  25. 25. Section IV. Bid data sheet 25(16.2b) The name and identification number of the Contract is: ………………………… Construction of KIENE COFFEE FACTORY(17.1 & 20.1) The deadline for submission of bids shall be ……………….and bids shall be opened ………………………. at the same date and address.(30.1) The Advance Payment shall be limited to ten (10) per cent of the Contract Price.
  26. 26. 26 Section V. Contract data Section V. Contract dataSerial Contract ClauseNumber Reference1. The Employer is: Name KALILUNI FARMERS CO-PERATIVE SOCIETY LTD P.O BOX 292-090100 MACHAKOS Name of Employer’s Authorised Representative: ………………………………………… ……………………………………………… The Project Manager is: Name: …………………………………….. Address: …………………………………… ………………………………………………….2. The name and identification number of the Contract is: ………………………………..: Construction of KIENE COFFEE FACTORY.3. The Works consist of:4. Construction of coffee factory.5. The Start Date shall be………….5. The completion date shall be: ………6. The Site is located at……………………….. And is defined in drawing numbers:_____________________________7. For a Contract that has been specified as subject to adjustment in accordance with Clause 11.4 of the ITB Bid Data Sheet, the prices shall be adjusted for fluctuations in the cost of inputs, the amounts certified in each payment certificate, after deducting for Advance Payment, shall be adjusted by applying the respective price adjustment factor to the payment amounts due in each currency. A separate formula of the type indicated below shall apply to each Contract currency: Pc = Ac + Bc Imc/Ioc where: Pc is the adjustment factor for the portion of the Contract Price payable in a specific currency “c”. Ac and Bc are coefficients7 specified hereunder, representing the nonadjustable and adjustable portions, respectively, of the Contract Price payable in that specific currency “c”; and Imc is the index prevailing at the end of the month being invoiced and Ioc is the index prevailing 28 days before Bid opening for inputs payable; both in the specific currencies “c”. If the value of the index is changed after it has been used in a calculation, the calculation shall be corrected and an adjustment made in the next payment certificate. The index value shall be deemed to take account of all changes in cost due to fluctuations in costs. The coefficients for adjustment of prices shall be: (a) For currency ________________(type of currency):7
  27. 27. Section V. Contract data 27 (i) ___________ (percent) percent nonadjustable element (coefficient A). (ii) ___________ (percent) percent adjustable element (coefficient B). (b) For currency ________________(type of currency): (i) _____________ (percent) percent nonadjustable element (coefficient A). (ii) _____________ (percent) percent adjustable element (coefficient B). The Index I for local currency will be _______________ (enter index)8. The Index I for currencies other than the local currency9 and the specified international currency will be __________________ (enter index).8. The following documents are also part of the Contract: The Schedule of Key Personnel9. (Any other amendments, additions to the contract shall be added or made here by the Employer)8 These proxy indices will be proposed by the Contractor, subject to acceptanceby the Employer.9 These proxy indices will be proposed by the Contractor, subject to acceptance bythe Employer.
  28. 28. 28 Section V. Contract data
  29. 29. 29 Section VI. SpecificationsTECHNICAL SPECIFICATIONGENERAL Description of the works The contract works include of Construction of KIENE COFFEE FACTORY Provision of equipments material and labour The contractor shall provide all equipments, transport consumable materials and labour necessary for the satisfactory completion of the works in compliance with the specifications herein. The Project Manager reserves the right to inspect plant and materials prior to contractor selection, and may reject plant or material that in his/her opinion is substandard or inappropriate. The contractor shall provide full descriptions of all plants to be deployed for these works. The contactor shall present method statements describing in detail the proposed approach to work. The contactor shall provide summary detail of the experience of key personnel to be deployed for these works. Occupation of site The employer will provide land on which the works shall be constructed. The contractor shall be given possession of such parts of the site that he requires for activities related to construction works including storage of raw materials, equipments and setting up of camp during the period of contract provided his operation does not interfere with the daily activities of the employer. The Contractor shall not enter upon or occupy with men, tools, equipment and materials any land other than the land or right of way provided by the employer Diligent performance The contractor shall at all times perform the Works diligently and in accordance with sound professional practice. He/she shall not proceed from one stage of works to another without the express permission of the Project Manager Decisions regarding Temporary halt, discontinuing of any element or part of any element of these works, or abandonment of these works, shall be discussed jointly between the contractor and the Project Manager before any further actions are authorized by the Engineer. The Project Manager’s decision shall be final. The Engineer will require a written submission justifying any steps taken by the successful bidder taken without the Project Manager’s approval. An unsatisfactory explanation shall lead to non-payment for works undertaken without prior agreement, and may be included for consideration as liquidated Damages. Drawings The project drawings shall comprise (a) The drawings attached to tender documents
  30. 30. 30 Section V. Contract data (b) Such other drawings and/or sketches as are issued from time to time by the Project Manager to deal with design modifications in response to on-site conditions. Record drawing As the work proceeds the Contractor shall mark up ‘As Built’ details on a set of prints of the contract Drawings modified to portray the works as actually constructed and issue to the Project Manager for approval within 7 days of completion of the works covered by each drawing. Level datum The Project Manager will establish on site temporary benchmark and will assign a value to it. The Contractor shall establish and maintain such additional benchmarks as are necessary; the form of such benchmarks shall be approved by the Project Manager. Contractor’s staff, communication, offices etc General The contractor shall advice the Project Manager at which of his offices any notices may be served in accordance with the conditions of contract. Language of correspondence and records All communication from contractor to the Project Manager and the Project Manager shall be in English language. All site books, time sheets, records, notes drawings, documents, specifications etc. shall be in English language Contractor’s duty staff & offices At least one responsible senior representative of the contractor shall be immediately available at all times and he shall be on site during normal working hours. To such representative shall be delegated full authority to confer with Project Manager and to take all steps and to issue all those instructions which may be required in an emergency to ensure the safety of all personnel of the works and of all the Employer‘s and other property on the site and in the immediate vicinity thereof. The Project Manager may from time to time at his discretion after taking into consideration all the prevailing conditions allow some relaxation of this clause but such relaxation shall be made only with his written permission and subject to any special conditions which he may then require. The contractor shall provide and maintain at the site, offices for the use of representative and to which written instructions by the Project Manager can be delivered. Any instructions delivered to such offices shall be deemed to have been delivered to the contractor. Public Relations
  31. 31. 31 The contractor shall designate within his site organization competent staff whose responsibility shall be to ensure good relations. The location of all yards, stores, workshops, offices, etc. shall be agreed beforehand with the Project Manager and shall be such as to avoid obstruction and nuisance to public and/or the client. The contractor shall provide and maintain at or near the site suitable and sufficient shelters, mess rooms, washrooms, latrines etc. as are necessary and customary, to the satisfaction of the Project Manager Project Manager and in accordance with the law and regulations of the relevant authorities.Accommodation for workmen Where the contractor wishes to construct camp to accommodate his labour, the following requirements shall be adhered to and shall also be subject to the requirement made by the District or Provincial Administration or any local Authority.Demolition of contractor’s temporary structuresThe Project Manager may at any time before the end of the period of maintenance give the contractor notice in writing to demolish and remove those buildings and works which are no longer required, whereupon the title to such buildings and works and materials connected therewith shall revert to the contractor. After the demolition and removal of building and works as required by the Project Manager and contractor shall level, clear, restore and make good the sites and surrounding ground and fill in and compact all latrines, drains, pits and similar works leaving the satisfaction of the Project Manager.First aid outfitsThe contractors shall provide and maintain in an easily accessible place at the site o f the works adequate first aid outfits for the whole duration of the contract, to the satisfaction of the Project Manager. The contractor shall have available at all times a suitable vehicle for conveyance of the sick or injured people to hospital.Protective clothingThe contractor shall provide all protective or any other special clothing or equipment for his employees that may be necessary.Inspection by Project Manager during period of defects liabilityThe Project Manager will give the contractor due notice of his intention to carry out any inspection during the period of Defects Liability and the contractor shall hereupon arrange for a responsible representative to be present at the times and dates named by the Project Manager. This representative shall render all necessary assistance and take note all matters and things to which his attention is directed by the Project Manager.AdvertisementNo advertisements shall be placed on any boarding or scaffolding erected for any purpose connected with the contract without the written permission of the Project Manager.
  32. 32. 32 Section V. Contract data Site investigations (a) Ground levels shown on the drawings are believed to be correct. Should the contractor consider the levels shown to be inaccurate he must draw the attention of the Project Manager to the discrepancy before interfering with the existing ground. (b) The Contractor must make such site investigations as he thinks fit and satisfy himself as to the nature of the ground and availability of materials. Work Programme The contractor shall submit a work programme showing the sequence and timing of the various stages in the execution of the works as per the conditions of contract. Facilities for the Project Manager The Contractor shall provide for the Project Manager or his representative: (a) Such instruments as are necessary to enable the Project Manager to check the setting out and make such inspections as he may deem necessary. (b) Such labour and assistance as may be required. (c) Any facilities necessary to enable the Engineer to take samples (d) A temporary site office of about 16 m2 furnished with a table, a cupboard for the storage of drawings and documents, and four chairs. Testing facilities (a) The Contractor shall provide laboratory facilities on site suitable for carrying out tests as shown:- (ii) Concrete • Slump • Crushing strength (iii) Aggregates • Particle Size • Impurities (b) Should the contractor so wish he may make arrangements for the necessary tests to be carried out by a Laboratory to be approved by the Project Manager.
  33. 33. 33 Water supply The contractor will arrange to provide water for use in the camps and on the works. The Contractor must provide any treatment necessary to ensure it is suitable for use as in accordance to health regulations. Electrical supply The Contractor must provide his own source of electricity if he so requires. Security The Contractor will be responsible for the security of the Works and of site installations during the Contract period. He must provide such fencing, watching & lighting as he deems necessary. Description of the materials and workmanship The following apply to all sections hereafter. (a) Materials Materials, commodities, components and equipment are to be new and unused unless otherwise specified. Handle, store, fix and protect all commodities with care to ensure that they are in perfect condition when incorporated into the work and handed over on completion. (b) Manufacturer’s recommendation Handle, store and fix every commodity strictly in accordance with the printed or written recommendations of the manufacturer and/or supplier. Supply the Project Manager with copies of the manufacturer’s recommendations. Inform the Project Manager if the manufacturer’s recommendations conflict with any other specified requirements, and obtain his instructions before proceeding. (c) StandardsWhere commodities or workmanship are specified by reference to Kenya Bureau of Standards (K.S.), or British Standards (B.S.) or Codes of Practice (C.P.) or International (I.S.O.), or other standards, such standards are deemed to be the latest published at the time of tendering. The Contractor will be deemed to have read and understood the standards specified, and no claim for want of knowledge will be allowed. The substitution of commodities or standards of workmanship complying with other standards may be allowed at the discretion of the Project Manager, but application for permission for such substitution must be made in writing in sufficient time to allow adequate investigation. Obtain Certificates of Compliance with standards and supply to the Project Manager on request. (d) Local conditions
  34. 34. 34 Section V. Contract data All materials, commodities, components and equipment must be suitable for use in tropical climates. Samples The Contractor shall submit to the Project Manager samples of materials to be used in the works, the samples must be fairly representative of the bulk to be supplied. Samples should be subject to relevant tests before submission and Test Certificates should accompany the samples. Clearing site on completion The site, including borrow pits and spoil dumps shall be carefully tidied up on completion, and shaped to avoid ponding, holes, and dangerous slopes. The borrow pits and spoil dumps must be covered with topsoil neatly trimmed and the whole site left in a tidy and satisfactory condition.EARTHWORKS Clearing in general Clear the area of the permanent works, and borrow pits of all vegetation and destroy by burning or otherwise. Stripping top soil Strip topsoil to a depth of 250 mm in the Weir site and borrow pits and stock for re- use. Excavation and classification Excavation shall be carried out to the lines and levels shown on the drawings or to such other lines and levels as the Engineer may direct. Excavation in excess of the lines and levels shown on the drawings or without the approval of the Engineer will be rectified by the Contractor at his expense in a manner approved by the Engineer. Any patches of unsuitable ground in the bottom of the excavations shall be excavated to such additional depth as the Engineer may direct. Excavated material shall be taken to embankment fill or to spoil tip as the Engineer may direct. Excavation must be kept dry and the sides supported as necessary. Excavation classification shall be as in the Ministry of Works Standard Specification (MOWSS) Section 5. Class 1 "Rock" or "Hard Material" shall include all materials which in the opinion of the Project Manager requires blasting or the use of metal wedges or the use of compressed air drilling for its removal or cannot be extracted by ripping with a tractor of less than 180 hp. and rear mounted heavy ripper. Individual boulders greater than 0.2 m3 in volume shall be included in this class when their nature and size are such that they cannot be removed without recourse to one of these methods.
  35. 35. 35 When a portion of excavation contains 75% or more by volume of boulders of this order such portion shall be considered as class 1 material throughout. Class 2 "Normal" or "Soft Material" shall include all material, which, in the opinion of the Engineer, does not require blasting and metal wedges and sledge hammers, or compressed air drilling or rooting or ripping. It shall include wearing course gravel stones and boulders less than 0.2 m 3 in volume that can be removed without recourse to these methods. Class 3 "Compacted Gravel" or "Decomposed Rock" shall include all material such as consolidated murram and decomposed stratified rock, stones or boulders less than 0.2 m3 in volume which are harder than "soft" or "normal" material in that they may be extracted by ripping as defined in Class 1, or in confined spaces by hand excavation using compressor tools, provided all other reasonable steps to the satisfaction of the Project Manager have been taken to facilitate the removal by other methods. "Waterlogged Material" material (Class 2 and Class 3) that is excavated in a waterlogged condition and necessitates de-watering and pumping operations, provided all reasonable precautions have been taken by the contractor to dewater the material to the satisfaction of the Project Manager.Blasting The prior approval of the Project Manager must be obtained and the methods approved if the Contractor wishes to remove rock by Blasting. The handling and use of explosives must comply with the explosives act or the department of mines and geology regulations. All necessary precautions to prevent injury or Damage to person or property must be taken. Generally blasting on the Weir site is to be avoided.Borrow areas Borrow areas have been identified by the Engineer. The borrow area will be opened by the Contractor. Topsoil must be stripped aside, and replaced on completion of the borrow. Additional borrow areas will be located by the Project Manager as and when required.Spoil tips Surplus or unsuitable materials are to be disposed of in spoil tips to be approved by the Project Manager. Spoil tips must be neatly graded, properly drained, and have stable slopes and a tidy appearance.Earthfill The embankment is to be built of selected soil as specified and shown on the drawings. The earthfill shall be of cohesive material of low permeability, with negligible organic matter. Specially selected material free from stones shall be used in the cut off and central zone; the upstream zone shall also be free of stones, the downstream zone may have small quantities of stone not exceeding 25 mm.
  36. 36. 36 Section V. Contract data Compaction of earthfill Earth fill shall be placed and mechanically compacted in layers, approximately horizontal, to give a finished thickness of not more than 150 mm after compaction to 95% of Proctor Maximum Dry Density. Each layer shall be scarified to ensure a satisfactory bond with the next overlying layer, and water shall be added if necessary to ensure uniform moisture content. Subsequent layers will be placed only after the previous layer has been ratified by the Project Manager. Heavy rollers of a type and weight to be approved by the Project Manager shall be used for compaction. In the cut off trench and other confined spaces compaction in area which the rollers cannot serve shall be by means of approved pneumatic tampers.CONCRETE WORKS General (a) Code of practice All workmanship, materials, tests and performances in connection with the reinforced concrete work are to be in conformity with the latest edition of British Standard Code of Practice (B.S. 8110 for “Structural Use of Concrete”) where not inconsistent with these specifications. (b) Contractor’s plant Not less than 30 days prior to the installation of the Contractor’s plant and equipment for processing, handling, transporting, storing and proportioning ingredients, and for mixing, transporting and placing concrete, the Contractor shall submit drawings for approval by the Project Manager, showing proposed general plant arrangements, together with a general description of the equipment he proposes to use. After completion of installation, the operation of the plant and equipment shall be subject to the approval of the Project Manager. Materials Cement Cement, unless otherwise specified, shall be Portland cement of the Blue Triangle brand, or Bamburi Portland Cement brand, Mombasa cement brand or any other brand which comply with the requirements of B.S.12 and is approved by the Project Manager. The cement Shall not contain reactive volcanic ash (of not more than 10% of total weight) and the quantity of insoluble residue permitted in B.S. 12 may be exceeded. A manufacturer’s Certificate of Test in accordance with B.S. shall be supplied for each consignment delivered to site. Should the Contractor require using cement of the rapid hardening variety, he shall obtain the approval of the Project Manager and also obtain any instructions regarding
  37. 37. 37the modifications to the preambles caused thereby. Any additional cost that may becaused by the use of the rapid hardening cement shall be at the Contractor’s expense.Cement may be delivered to site either in bags or in bulk. If delivered in bags, eachbag shall be properly sealed and marked with the manufacturer’s name and on the siteis to be stored in a weather-proof shed of adequate dimensions with a raised floor.Each consignment shall be kept separate and marked so that it may be used in thesequence in which it was received. Any bag found to contain cement which has set orpartly set shall be completely discarded and not used in the Works. Bags shall not bestored more than 1500 mm in height.If delivered in bulk the cement shall be stored in a weather-proof silo either providedby the cement supplier or by the Contractor, but in either case the silo shall be to theapproval of the Engineer. AggregatesThe aggregates shall conform with the requirements of B.S. 882 and the sources andall types of all aggregates are to be approved in all respects by the Project Managerbefore work commences.The grading of aggregates shall be one within the limits set out in B.S. 882 and as laterspecified and the grading, once approved, shall be adhered to through out the Worksand not varied without the approval of the the Project Manager. Fine aggregate shallbe clean, coarse, siliceous sand of good, sharp, hard quality and shall be free fromlumps of stone, earth, loam, dust, salt, organic matter and any other deleterioussubstances. It shall be graded within the limits set out in zone 1 or 2 of B.S. 882.Coarse aggregate shall be good, hard, clean approved black trap or similar stone, freefrom dust, decomposed stone, clay, earthy matter, foreign substances or friable thinelongated or laminated pieces. It shall be graded within the limits of Table 1 of B.S.882 for its respective nominal size.If in the opinion of the the Project Manager the aggregate meets the aboverequirements, but is dirty or adulterated in any manner it shall be screened and/orwashed with clean water if he so directs at the Contractor’s expense.Aggregates shall be delivered to the site in their prescribed sizes or grading and shallbe stockpiled on paved areas or boarded platforms in separate units to avoidintermixing.Fine aggregateFine aggregate shall be sand free from impurities and complying with British StandardNo. 882. Grading zone 2 of Table 2. Coarse aggregate
  38. 38. 38 Section V. Contract data Coarse aggregate shall be hard crushed rock free from impurities and complying with British Standard No. 882 "graded aggregate" 20 mm to 5 mm nominal size as Table 1. Water Water for concrete shall be free from impurities, complying with BS 3148 Hardcore Hardcore for filling under floors shall be good, hard stone ballast or quarry waste, to the approval of the the Project Manager, broken to pass through not greater than a 150 mm ring or to be 75% of the finished thickness of the layers being compacted, whichever is the lesser. Hardcore shall be free from all weeds, roots, vegetable soil, clay, black cotton soil or other unstable materials. It shall be graded with smaller stones and fine materials to give a dense compact mass after consolidation. Sufficient fine material shall be added to each layer to give gradation of material as necessary to obtain a solid compact mass after rolling. Hardcore filling is to be laid in layers each of a consolidated thickness not exceeding 250 mm. Each layer shall be compacted by at least 8 passes of a 10-tonne smooth- wheeled roller or a 2-tonne vibrating roller until all movement ceases. Sufficient water is to be added to obtain maximum compaction to the the Project Manager’s approval. To each layer a 25 mm thick layer of sand complying with the specification of fine aggregate for concrete shall be spread over the surface and forced into the hardcore by the use of a vibrating roller weighing not less than 2 tones. This operation should be carried out when the materials are dry and repeated whilst the sand is well watered. Should all the sand be absorbed the the Project Manager may require a further layer to be applied and the process repeated. The top surface of the hardcore shall be leveled or graded to fall as required, and shall then be blinded with a layer of similar material broken to 25 mm gauge and finished with a 10-tonne smooth-wheeled roller. The surface so obtained shall be to the Engineer’s approval. Compacted hardcore The sub-grade shall be compacted by a smooth-wheeled roller of 8 to 10 tonnes weight or the vibrating roller of minimum 1300 Kg., or other approved plant. The number of coverage shall be at least 10 and there shall be a 50% overlap of successive coverage. If so instructed by the Engineer, water shall be added during compaction to obtain optimum water content. Filling shall be compacted as above but in maximum 200 mm deep layers. Sand The sand shall be as described for fine aggregate but that for plastering shall be light in colour and well graded to a suitable fineness in accordance with the nature of work in order to obtain the finish directed.
  39. 39. 39Finishes General The Contractor will be required from an early stage in the contract to prepare samples, for the approval of the the Project Manager, of the various concrete finishes specified hereafter. Samples are to be prepared using the same materials and the same methods of construction, compaction, curing, etc. as the Contractor proposes to use for executing the full quantity of the work. A record of the mix, water content, method of compaction, any additives used, etc., is to be kept for each sample prepared. When the the Project Manager has approved a sample it will be kept on site in an approved location. The finishes in construction will be expected to be up to a standard equal to the approved sample. Consistency in cement colour, and the colour, grading and quality of aggregates must be maintained in all finished concrete work. Mortars Cement mortar shall consist of one part of Portland cement to three parts sand by volume. The cement/lime mortar shall consist of one part of Portland cement, one part of lime and six parts of sand by volume. The ingredients of mortar shall be measured in proper gauge boxes on a boarded platform, the ingredients being thoroughly mixed dry, and again whilst adding water. In the case of cement/lime mortar, sand and lime shall be mixed first and then the cement added. All mortar is to be thoroughly mixed to a uniform consistency with only sufficient water to obtain a plastic condition suitable for toweling. No mortar that has commenced to set is to be used or re-mixed for use. Tamped finish Areas so specified shall be finished at the time of casting with a tamped finish to the Engineer’s approval produced by an edge board. Board marks are to be made to a true pattern and will generally be at right angles to the traffic flow. Haphazard or diagonal tamping will not be accepted. Fair face Fair face surfaces shall be clean, smooth, even, true to form, line and level, and free from all board marks, joint marks, honeycombing, pitting, and other blemishes. Forms are to be provided with a smooth lining of plywood, steel, or other approved material which will achieve the required finish without any general rubbing down. Rubbing down will only be permitted to remove any projecting fins at corners or joints. Fine face Fine face surfaces shall be for Fair face above, but to a higher standard obtained from forms provided with an impervious sheet lining of metal or plastics faced plywood in large panels arranged in an approved pattern. Rubbing down shall only be permitted
  40. 40. 40 Section V. Contract data after an inspection by the Project Manager. The finished surfaces shall be capable of receiving a painted finish. Chisel-dressed finish Chisel-dressed finish is to be carried out on any grade of concrete but not until it is at least 30 days old. The surfaces are to be fully chisel-dressed to remove a maximum of 12 mm (average 9 mm) of the surface by shearing and exposing the aggregate without excessive cracking of the surrounding matrix. Arises of columns, beams, etc., are pre- formed fair face with timber fillets set in the formwork and care must be taken in working up to these to preserve a clean line. For vertical surfaces of walls and columns particular care must be taken to remove all sharp projections. For beam soffits this requirement is not necessary. All surfaces requiring this treatment are to have margins chisel-dressed by hand for a minimum width of 75 mm commencing from the fillet edge. Thereafter, mechanical chisel- dressing may be used, but the Contractor must ensure that a uniform texture and even plane surface is achieved. The use of sharply pointed steel tools for both hand and mechanical chisel-dressing is essential. Upon completion the surfaces are to be thoroughly wire brushed and washed down. Protection of finishes Wherever possible, in-situ exposed concrete finishes should be commenced at the highest level and worked progressively down the building. Precaution shall be taken to avoid staining or discoloration of previously finished concrete faces by leakage of grout from newly placed concrete. The Contractor shall, during all stages of construction, adequately protect all concrete finishes from Damage by leaking grout, knocking, paint stains, falling plaster, etc. In cases of balustrade walls to staircases and members where Damage is otherwise likely, concrete finishes shall be protected by cladding with timber, celotex, or other approved sheeting. All Sub-contractors shall be informed accordingly on the precautions to be taken. Blinding All blinding concrete to be 1:3:6, or as otherwise instructed by the Project Manager in writing. Formwork The method and system of formwork which the Contractor proposes to use shall be approved of by the Project Manager before construction commences. Formwork shall be substantially and rigidly constructed of timber or steel or pre-cast concrete or other approved material. All timber for formwork shall be good, sound, clean, sawn, well-seasoned timber, free from warps and loose knots and of scantings sufficiently strong for their purpose. Construction of formwork
  41. 41. 41All formwork shall be of sufficient thickness and with joints close enough to prevent undue leakage of liquid from the concrete and fixed to proper alignment, level and plumb and supported on sufficiently strong bearers, shores, braces, plates e.t.c. properly held together by bolts or other fastenings to prevent displacement, vibration or movement by the weight of materials, men and plant on same and so wedged and clamped as to permit easing and removal of the formwork without jarring the concrete. Where formwork is supported on previously constructed portions of the reinforced concrete structural frame, the Contractor shall by consultation with the Project Manager ensure that the supporting concrete is capable of carrying the load and/or sufficiently propped from lower floors or portions of the frame to permit the load to be temporarily carried during construction. Soffits shall be erected with an upward camber of 5 mm for each 5 meters of horizontal span or as directed by the Project Manager. Great care shall be taken to make and maintain all joints in the formwork as tight as possible, to prevent the leakage of grout during vibration. All faulty joints shall be caulked to the Project Manager’s approval before concreting. The formwork shall be sufficiently rigid to ensure that no distortion or bulging occurs under the effects of vibration. If at any time the formwork is insufficiently rigid or in any way defective the Contractor shall strengthen or improve such formwork as the Project Manager may direct. The Contractor’s attention is drawn to the various surface textures and applied finishes required and the faces of formwork next to the concrete must be of such material and construction and be sufficiently true to provide a concrete surface which will in each particular case permit the specified surface treatment or applied finish. All surfaces which will be in contact with concrete shall be oiled or greased to prevent adhesion of mortar. Oil or grease shall be of a non-staining mineral type applied as a thin film before the reinforcement is placed. Surplus moisture shall be removed from the forms prior to placing of the concrete. Temporary openings shall be provided at the base of columns, wall and beam forms and at any other points where necessary to facilitate cleaning and inspection immediately before the pouring of concrete. Before the concrete is placed the shuttering shall be trued-up and any water accumulated therein shall be removed. All sawdust, nails, chips and other debris shall be washed out or otherwise removed from within the formwork. The reinforcement shall then be inspected for accuracy of fixing. Immediately before placing the concrete the formwork shall be well wetted and inspection openings shall be closed. The erection, easing, striking and removing of all formwork must be done under the personal supervision of a competent foreman, and any Damage occurring through faulty formwork or its incorrect removal shall be made good by the Contractor at his own expense. After removal of formwork, all projections, fins etc., on the concrete surface shall be chipped off, and made good to the requirements of the Project Manager. Any voids or honeycombing shall be treated as described in “Faulty Concrete”. Stripping formwork
  42. 42. 42 Section V. Contract data All formwork shall be removed without undue vibration or shock and without Damage to the concrete. No formwork shall be removed without the prior consent of the Engineer and the minimum periods that shall elapse between the placing of the concrete and the striking of the formwork will be as follows: Beam sides, wall and columns 2 days Slab Soffits (props left under) 3 days Beam Soffits 7 days Removal of props (partly subject to 7 days concrete cube strength being satisfactory) to: Slabs 10 days Beams 14 days Cantilevered Beams and Slabs 28 days If the Contractor wishes to take advantage of the shorter stripping times permitted for beams and slab soffits when props are left in place, he must so design his formwork that sufficient props are agreed with the Project Manager can remain in their original positions without being moved in any way until the expiry of the minimum time for removal of props. Stripping and re-propping will not be permitted. The above times may be reduced in certain circumstances, at the discretion of the Engineer provided an approved method is adopted at the Contractor’s expense to ensure that the required concrete strength is attained before the forms are stripped. Solid strips in composite slabs shall be considered as beams. The tops of retaining walls shall be adequately supported with stout raking props at intervals required by the Engineer. These props are not to be removed until 7 days after casting of the floor slab is over. Supporting props to wall and beam soffits When directed by the Project Manager, supporting props to wall and beam soffits are to be left in position until the completion of the whole of the reinforced concrete structure. The props are to be to the approval of the Engineer and the Contractor must submit the suggested method of propping to the Engineer prior to removal of formwork to the relevant surfaces. Concrete mixes Concrete to be used shall be of the classes specified in "Ministry of Works standard Specification" Section 17. Class Nomin Trial Strength in N/mm2 Where used in this al mix Contract 7 day 28 day 15 1:3:6 13 19.5 Surround to pipes 25 1:2:4 25 32.5 Spillway lining, walls
  43. 43. 43Concrete mixing and placing The concrete shall be mixed only in approved power-driven mixers of a type and capacity suitable for the work, and in any event not smaller than 0.04/0.28 cu.m. capacity. The mixer shall be equipped with an accurate water measuring device. All materials shall be thoroughly mixed dry before water is added and the mixing of each batch shall continue for a period of not less than two minutes after the water has been added and until there is a uniform distribution of the materials and the mass is uniform in colour. The entire contents of the mixed drum shall be discharged before recharging. The volume of mixed material shall not exceed the rated capacity of the mixer. Whenever the mixer is started, 10% extra cement shall be added to the first batch and no extra payment will be made on this account. As a check on concrete consistency slump tests may be carried out and shall be in accordance with B.S. 1881. The Contractor shall provide the necessary apparatus and carry out such tests as are required. The slump of the concrete made with the specified water content, using dry materials, shall be determined and the water to be added under wet conditions shall be so reduced as to give approximately the same slump. The concrete shall be mixed as near to the place where it is required as is practicable, and only as much as is required for a specified section of the work shall be mixed at one time, such sections being commenced and finished in one operation without delay. All concrete must be efficiently handled and used in the Works within twenty (20) minutes of mixing. It shall be discarded from the mixer direct either into receptacles or barrows and shall be distributed by approved means which do not cause separation or otherwise impair the quality of the concrete. Approved mechanical means of handling will be encouraged, but the use of chutes for placing concrete is subject to prior approval of the Project Manager. Concrete shall be placed from a height not exceeding 1,500 mm directly into its permanent position and shall not be worked along the shutters to that position. Unless otherwise approved, concrete shall be placed in a single operation to the full thickness of slabs, beams, and similar members, and shall be placed in horizontal layers not exceeding 1,500 mm deep in the walls and similar members. Concrete in columns may be placed to a height of 4 meters with careful placing and vibration and satisfactory results. Where the height of the column exceeds 4 meters suitable openings must be left in the shutters so that this maximum lift is not exceeded. Concrete shall be placed continuously until completion of the part of the work between construction joints as specified hereinafter or of a part of the approved extent. At the completion of a specified or approved part a construction joint of the form and in the positions hereinafter specified shall be made. If stopping of concrete be unavoidable elsewhere, a construction joint shall be made where the work is stopped. A record of all such joints shall be made by the Contractor and a copy supplied to the Project Manager. Any accumulation of set concrete on the reinforcement shall be removed by wire brushing before further concrete is placed. The Contractor shall provide runways for

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