I    GENERAL PRINCIPLES
1. Bills of quantities
Bills of quantities shall fully describe the materials and workmanship and accurately represent the work to be executed; work which by its nature cannot be accurately measured shall be described as provisional.
Provisional items or sections shall represent the work to be carried out as accurately as is reasonable possible.
2. Principles of measurement
This Standard Method of Measurement, whilst aiming at providing uniform units of measurement and standard allowances, etc., is a definition of principle rather than an inflexible document. In particular and exceptional case the Surveyor is expected to use his discretion and to adopt special methods, provided the principles of measurement laid down are observed and the intention in made clear to Estimator.
If it is in the interest of accurate and practical estimating, he may give more detailed information than is demanded by strict adherence to this document.
3. Applicability of methods of measurement
The methods of measurement laid down shall be applicable to the preparation of Bills of Quantities before the work in commenced equally with measurement of fished work.
4. Units of measurement
a. The following units of measurement shall, except as hereinafter provided, be adopted throughout:-
Items given by weight - kilograms
Items given cube     - cubic meter
Items given super     - square meter
Items given run       - linear meter
Items enumerated     -number
b. Each measurement shall be taken to the nearest 10 millimeters (i.e. 5 millimeters and over shall be regarded as 10 millimeters and less then 5 millimeters shall be disregarded). This rule shall not apply to any dimensions stated in descriptions.
5. Drawings and Specification
The drawings form which the Bills of Quantities have been prepared shall be listed and reference shall be made to any Specification on which the Bills of Quantities descriptions are based.
6. Units of billing
Where the unit of billing is the meter, quantities shall be billed to the nearest whole unit. Fraction of a unit less than half shall be disregarded and all other fractions shall be regarded as whole units.
Where the unit of billing is the kilogram, quantities shall be billed to the nearest whole unit. Fractions of a unit less than half shall be disregarded and all other fractions shall be regarded as whole units.
Where the application of this Clause would cause an entire item to be eliminated, such item shall be billed as one whole unit.
When billing items of variation or remeasurement in adjustment of accounts, omissions and additions of items where the unit of billing is the meter shall be billed to the nearest one tenth of a whole unit, and where the unit of billing is kilogram shall be billed to the nearest whole unit.
7. Work measured net
    Unless otherwise stated, all work shall be measured net as fixed in its place.
8. Order of dimensions
    In giving dimensions the order should be consistent, and generally in the sequence of length, width and height.
9.

香港工程量清单计价规范（英文版）.doc