香港工程量计算规则(英文).doc

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:-
(1) Items given by weight - kilograms
(2) Items given cube - cubic meter
(3) Items given super - square meter
(4) Items given run - linear meter
(5) 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
a. 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.
b. 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.
c. Where the application of this Clause would cause an entire item to be eliminated, such item shall be billed as one whole unit.
d. 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. Costs held to be included in items
Each item shall, unless otherwise stated, be held to included:-
a. Labor and all costs in connection therewith.
b. Materials, goods and all costs in connection therewith (e.g. conveyance; delivery; unloading; storing; returning packings; handing; hoisting; lowering).
c. Fitting and fixing materials and goods in position.
d. Use of plant.
e. All cutting and waste.
f. Establishment charges. Overhead charges and profit.
10. Minimum deductions
Where minimum deductions of voids are dealt with in this document they shall refer only to openings or wants detached from the boundaries of she space measured.
Openings and wants caused by projections from the boundary of the space measured shall always be the subject of deduction, irrespective of size.
11. Grouping of pipe sizes
Pipes or tubing (which terms shall be synonymous for these rules of measurement) shall be described by their internal diameter unless otherwise stated.
Where required by the rules of this document pipes shall be grouped together within the following limits and described as:-
a. Small pipes (pipes not exceeding 55 millimeters diameter).
b. Large pipes (pipes exceeding 55 millimeters but not exceeding 110 millimeters diameter).
c. Pipes exceeding 110 millimeters (diameter to be stated).
12. Circular work
Where circular work is required by rules of this document to be kept separate it shall be grouped together within the following limits and described as being to:-
a. Small radius – any radius not exceeding 300 millimeters.
b. Medium radius – any radius exceeding 300 millimeters but nor exceeding 1.5 meters.
c. Large radius – any radius exceeding 1.5 meters.
132. Provisional and Prime Cost Sums
The use of the terms Provisional and Prime Cost Sums shall be made in conformity with the following definitions unless otherwise provided in the conditions of contract.
a. The term “Provisional Sum” shall mean a sum provided for work or costs which cannot be entirely foreseen, defined or detailed at the time the tending documents are issued.
b. The term “Prime Cost Sum” shall mean a sum provided for work or services to be executed by a Nominated Sub-Constructor or for materials or goods to be obtained from a Nominated Supplier. Such sum shall be deemed to be exclusive of any profit or attendance required by the Main Contractor and provision shall be made for the addition thereof.
14. Work under reservoir, river or sea water
All work executed in or under reservoir, river or sea water shall be given separately stating the levels of high and low water where applicable.
15. Work in compressed air
All work required to be carried out in compressed air shall be given separately.
16. Generally
Each Sub-Section of a Trade shall be read in conjunction with the General Rules and Principles detailed in “Clause 1. Generally” of that Trade.
II PRELIMINARY
PRELIMINARY PARTICULARS
1. Employer, Architect and Quantity Surveyor
The names of the Employer, Architect and Quantity Surveyor shall be stated.
2. Description of works
A general description of the works comprised in the Bills of Quantity shall be given. The size of the building and height above and below ground level shall be stated together with the number of stories.
3. Site an inspection
a. The position of the site shall be described with any particulars as to access and to any limitations as to extent and position of the working space. Attention shall be drawn to any adjacent or abutting building.
b. Contractors tendering shall be advised to visit the site and inspect holes (if any) and shall be informed where keys may be obtained, if they are required, and where the drawings and other documents may be seen.
c. Any stipulation as to use or disposal of sand, gravel or rock that may be found on the site shall be stated.
4. Division of the work into sections
a. Where possession of the site is to be given in sections at different dates, particulars shall be given.
b. Where the works are to be executed in any specific order or in sections, particulars shall be given.
CONDITIONS OF CONTRACT
5. Form of contract
a. The form of contract and conditions shall be stated and a schedule of the clause headings to be used shall be set out in the Bills of Quantities.
b. A copy of the full conditions shall be supplied to the contractors or made available for their inspection.
c. Any items affecting price which are incidental to or amplification of such clauses shall be fully described.
6. Particulars to be inserted in Appendix of Conditions
The particulars which will be inserted in any Appendix to Schedule of Conditions shall be given in tabulated form.
7. Sub-letting
The conditions under which the contractor may sub-let portions of the work.
8. Artists or Tradesmen not Sub-Contractors
Permission for execution of work by Artists or Tradesmen who are not Nominated Sub-Contractors and who may be engaged by the Employer.
9. Injury to persons and damage to property
Responsibility of the contractor for injury to persons and damage to property including public or private rode.
10. Insurances, etc.
a. Insurance against or allowance to be made in respect of the following:-
(1) Fire and extraneous perils.
(2) Injury to persons and property.
(3) Workmen’s compensation.
(4) Any other items of insurance or guarantee required by the Conditions of Contract or the Employer.
b. Special requirements in respect of minimum acceptable limits of liability and excesses shall be state.
c Where insurances are to be extended to cover professional fees, particular shall be given.
11. Provisional and Prime Costs sums
Provisional and Prime Costs (P. C.) Sums and the method of adjustment. Where the cost of cartage, unloading, storing and returning packing material is be added by the Contractor it shall be so stated.
12. Conditions of payment
Conditions of payment.
13. Surety or bond
Surety or bond required by the Employer.
14. Watching
Care of Works generally, employment of watchmen and protective lighting.
GENERAL MATTERS
Items shall be given in respect of the following unless they are already covered in the Schedule of Clause Heading given in accordance with Clause 5a hereof.
15. Working hours, rates of wages, etc.
a. Any special stipulations as working hours of conditions.
b. Any conditions that may be imposed as to rates of wages and prices of material.
16. Plant, tools, sheds, etc.
a. Plant, tools, scaffolding and staging. Special scaffoldings if required for Nominated Sub-Contractors work.
b. Offices, sheds, messrooms, accommodation and attendances, and other welfare facilities.
c. Sanitary conveniences, their maintenance and removal.
d. Temporary screen.
e. Telephones.
17. Notices and fees
Compliance with Labor Departments’ notices required by any Act or Ordinance of Government, Regulations and Bye-laws of any Local Authority and any Public Service Company or Authority and paying of and indemnifying the Employer against any fees or charges legally demandable thereunder.
18. Safety precautions
Compliance with Labor Departments’ construction Sites (Safety) Regulations 1973.
19. Industrial Training levy
Payment of the levy legally demandable under the Industry Training (Construction Industry) Ordinance.
20. Setting out
Setting out the works and provision of all instruments and labor required by the Architect for checking this work.
21. Foreman
General Foreman and his attendance on the works.
22. Protection of public property, etc.
Maintenance and protection of public property and the property of the Public Utility Service Companies and the making good of or paying for the making good of all damage thereto.
23. Protection
a. Protection of the work and materials from weather.
b. Casing or covering up and protecting.
24. Treasure trove, coins, etc.
Disposal of any treasure trove, coins or objects of antiquity.
25. Variations and methods of measuring and valuing
a. Particulars relating to variations and the orders for and the method of measuring and valuing the same.
b. Particulars relating to daywork accounts.
26. Sample
Submission of samples.
27. Testing of materials
Conditions relative to the testing of materials.
28. Water
Water for the Works, including that for Nominated Sub-Contractors and necessary temporary plumbing and storage.
29. Lighting and power
Lighting and power for the Works, including that for Nominated Sub-Contractors and any necessary temporary wiring and meters.
30. Attendance
a. General attendance of one trade upon another.
b. General attendance upon Nominated Sub-Contractors; this shall be give particulars of any unloading, storing, hoisting, special supply of power, placing in position of materials, clearing away rubbish and the like, protecting, cutting away for and making good after Nominated Sub-Contractors and other facilities to be afforded by the Contractor. Any other Contractor’s work in connection shall be measured in detail or covered by Provisional Sums.
31. Hoardings, etc.
Provision of hoardings, fans, planked footways, guard rails, gantries, lighting and the like may be required.
Any special requirements shall be described and the conditions regarding advertising rights shall be stated.
32. Works by Public Authorities
Works to be carried by Government Departments or Utility Companies which shall be dealt with by means of Provisional Sums, e.g.:-
(1) Taking up and relaying the paving of public roads and footways.
(2) Forming permanent crossings.
(3) Connections with water, gas, electric mains and the like.

33. Temporary roads
Temporary roads and crossings where required with all relevant particulars.
34. Drying the building
The provision of fuel and attendance for drying the building, if required.
35. Removal of rubbish
The removal of rubbish and debris, clearing up and cleaning.
36. Defects after completion
Making good defects appearing within the Defects Liability Period, and extant of such period.

III DEMOLITIONS AND ALTERATIONS
GENERAL
1. Generally
a. The location of demolitions and alterations shall be given in the description of the items.
b. Shoring and scaffolding incidental to the demolitions and alterations shall be given in the description of the items. Other shoring (e.g. to old building left standing) shall be given in accordance with Clause 10 hereof.
c. Old materials arising form the demolitions and alterations shall become the property of the Contractor unless otherwise stated. Clearing away such old materials shell be held to be included with the items. Provisions shall be made in the Bills of Quantities for credits.
d. Old materials required to remain to the property of the Employer shall be so described. Setting aside and storing such old materials shall be given in the description of the items.
e. Old materials permitted to be re-used in work measured as new shall be so described. No adjustment shall be made to the measured quantities of new work in which such materials are re-used.
DEMOLITIONS

2. Demolitions
a. Demolitions individual structure (or part thereof) shall be given as items, except that clearing the site of all structure may be given as an item. The lowest level of demolition shall be stated (e.g. down to the top surface of concrete at the lowest floor level).
b. Where whole structure shall be demolished, a description of the structure shall be given, stating the overall dimensions, number of storeys, nature of the general construction and any other relevant details.
c. Leaving parts of old walls temporarily in position to act buttresses shall be given in description