CHAPTER 9 MEASUREMENT PROCEDURE - ukdao.com

1 CHAPTER 9 MEASUREMENT PROCEDURE 2006 Edition 2006 Edition SYNOPSIS This CHAPTER describes the criteria to be adopted, the procedures to be followed and the documentation that is required in the MEASUREMENT of civil engineering works and to be read in conjunction with the relevant departmental guidelines where appropriate.

2 It should be noted that these are guidelines for good practice rather than mandatory procedures . The project officer should ensure the suitability of the use of these guidelines by taking into account the scale and the complexity of the project and the availability of staff resources. 2006 Edition CONTENTS Page No. 1. GENERAL TYPE OF CONTRACTUAL ARRANGEMENT Lump Sum Contracts with Drawings and Specification Lump Sum Contracts with Firm Bills of Quantities Remeasurement Contracts with Approximate Bills of Quantities Schedule of Rates Contracts Design and Build Contracts STANDARD METHOD OF MEASUREMENT (SMM) Purpose Adopted Document Guidelines for Use Standard Phraseology of Item Descriptions ACCURACY OF MEASUREMENT MEASUREMENT RESPONSIBILITY 2.

3 CAPITAL WORKS CONTRACTS PRE-CONTRACT MEASUREMENT BILLS OF QUANTITIES Definition Objectives Preparation TAKING OFF General Rules Entering Dimensions Drawings and Information Use of Schedules MENSURATION MEASUREMENT of Areas MEASUREMENT of Volumes MEASUREMENT of Bar Reinforcement PREPARATION OF BILLS OF QUANTITIES Squaring Abstracting Billing 2006 Edition Page No.

4 ALTERNATIVE METHODS OF BILL PREPARATION Billing Direct Alternative Form of Billing Direct Cut and Shuffle PREAMBLES General Preambles Particular Preambles PRELIMINARY ITEMS PRIME COST ITEMS PROVISIONAL SUMS PROVISIONAL ITEMS DAYWORK ADJUSTMENT ITEM CONTINGENCY SUM BULK CHECK 3. CAPITAL WORKS CONTRACTS POST-CONTRACT MEASUREMENT GENERAL Considerations Upkeep of Records Care of Documents BASIC procedures INTERIM MEASUREMENT General MEASUREMENT Payment PROCEDURE Materials on Site FINAL MEASUREMENT General Sources of Information for Final MEASUREMENT

5 Rough MEASUREMENT Book Site MEASUREMENT Book 2006 Edition Page No. MEASUREMENT Squaring Abstracting Statement of Final Account and Payment PROCEDURE MEASUREMENT Records by Electronic Means 4. TERM CONTRACTS PRE-CONTRACT MEASUREMENT GENERAL SCHEDULE OF RATES Method of MEASUREMENT Application Preparation 5.

6 TERM CONTRACTS POST-CONTRACT MEASUREMENT INTRODUCTION MEASUREMENT STATEMENT OF FINAL ACCOUNT CHECKING OF THE STATEMENT OF FINAL ACCOUNT CERTIFICATION - WORKS COMPLETED ACCOUNTANCY CHECK CERTIFICATION BY THE ENGINEER PAYLISTING FILING INTERIM MEASUREMENT 6. MEASUREMENT FOR COST ESTIMATION GENERAL METHOD OF MEASUREMENT 2006 Edition Page No.

7 FORM OF ESTIMATES Order of Cost Schedule of Major Items Project Estimate Estimate for Works Order 7. REFERENCES APPENDICES APPENDIX AN EXAMPLE OF TAKING-OFF ON DIMENSION PAPER APPENDIX DRAWING RECORD APPENDIX DRAINAGE SCHEDULE APPENDIX MEASUREMENT OF AREAS AND VOLUMES APPENDIX AN EXAMPLE OF AN ABSTRACT SHEET APPENDIX A SAMPLE OF COMBINED DIMENSION PAPER AND BILL PAPER APPENDIX AN EXAMPLE OF TAKING-OFF ON CUT AND SHUFFLE PAPER APPENDIX SITE MEASUREMENT RECORD SHEET APPENDIX SITE MEASUREMENTS BINDING COVER APPENDIX RUNNING ABSTRACT APPENDIX TERM CONTRACT PAYMENT

8 RECORD REGISTER APPENDIX PAYMENT VOUCHER ROUTING SHEET APPENDIX ABSTRACT SHEET FOR A WORKS ORDER APPENDIX SUMMARY SHEET FOR A WORKS ORDER APPENDIX STATEMENT OF FINAL ACCOUNT FOR A WORKS ORDER APPENDIX PAYMENT ON ACCOUNT FOR A WORKS ORDER 2006 Edition 1. GENERAL TYPE OF CONTRACTUAL ARRANGEMENT It is desirable to begin by defining the type of contractual arrangement in relation to the ` MEASUREMENT ' of civil engineering works (see also CHAPTER 5 - Contract Documents).

9 Lump Sum Contracts with Drawings and Specification The contract sum is based on the drawings and specifications, and MEASUREMENT is only required to assist in valuation of the variations. This contractual arrangement is also applicable to the electrical and mechanical works (see WBTC No. 19/2000) and those works of which an alternative design proposed by the Contractor is accepted (see ETWB TC (W) No. 25/2004). Lump Sum Contracts with Firm Bills of Quantities The quantities for the works form the basis of the contract sum and are not subject to remeasurement. Accurate quantities have to be measured from the fully completed design in the pre-contract stage. During the contract period, MEASUREMENT is required for provisional quantities and valuation of variations only (see WBTC No.)

10 17/95). Remeasurement Contracts with Approximate Bills of Quantities The quantities in the Bills of Quantities (BQ) are approximate only and are subject to remeasurement upon completion of works on site. This form of contractual arrangement is adopted in the General Conditions of Contract for Civil Engineering Works (1999 Edition) (GCC) and is commonly used for capital works projects. Schedule of Rates Contracts This type of contract is suitable where it is not possible or practical at the tender stage to give realistic and accurate quantities of the works that are to be undertaken. For these contracts, a Schedule of Rates is drawn up as a list of all the items that are expected to be required for the Works. The tenderers need to insert prices against each item or state the percentages above or below the given rates for which they would be prepared to execute the Works (see paragraph for details).