INTRODUCTION - 建築署 | Architectural Services …

1 INTRODUCTION The 2017 Edition of the General specification for Building comprises considerable updating and revisions to the 2012 Edition. The review of the 2012 Edition was carried out by the Technical Information Committee of the Architectural Services Department (ArchSD). Principal amendments and additions in the 2017 Edition include the revision of technical requirements, updating of the BS Standards and BS EN Standards where applicable as well as incorporation of further greening specification . The updating of specification is a continuous process. With the benefit of information technology, the electronic version of this 2017 Edition of the General specification will be kept up-to-date and may be viewed on the ArchSD Homepage.

2 CONTENTS Section No. Title of Section Pages 1 Preliminaries 1-1 ~ 1-19 2 Demolition, Site Clearance & Alterations 2-1 ~ 2-14 3 Excavation & Earthwork3-1 ~ 3-17 4 Steel Sheet Piling Work 4-1 ~ 4-5 5 Piling Work 5-1 ~ 5-40 6 Structural Concrete Work 6-1 ~ 6-40 7 Prestressed Concrete Work 7-1 ~ 7-9 8 Concrete for Minor & Non-structural Work 8-1 ~ 8-5 9 Brickwork & Blockwork 9-1 ~ 9-6 10 Masonry 10-1 ~ 10-5 11 Tanking 11-1 ~ 11-5 12 Roofing 12-1 ~ 12-14 13 Carpentry & Joinery 13-1 ~ 13-13 14 Ironmongery 14-1 ~ 14-14

3 15 Structural Steel Work 15-1 ~ 15-23 16 Curtain Walls 16-1 ~ 16-43 17 Metal Work 17-1 ~ 17-12 18 Finishes 18-1 ~ 18-48 19 Sanitary Appliances 19-1 ~ 19-6 20 Glazing 20-1 ~ 20-12 21 Painting 21-1 ~ 21-26 22 Internal Fittings and Fixtures 22-1 ~ 22-12 23 Plumbing and Drainage23-1 24 External Works 24-1 ~ 24-7 25 Landscape Work 25-1 ~ 25-72 26 Geotechnical Works on Soil and Rock Slopes 26-1 ~ 26-45 Index 1 Not Used Index 2 Subjects and Clause Numbers B1 ~ B19 Index 3 List of StandardsC1 ~ C3 Index 4 List of Ordinances, Regulations, Codes and Standards for Section 16 and 20 D1~ D2 Section 1 Preliminaries 1-1 SECTION 1 PRELIMINARIES Applicability This General specification for Building is applicable to all building works in connection with the construction, alteration and maintenance of buildings unless overridden by the General Conditions of Contract, Special Conditions of Contract, Drawings, Bills of Quantities, Schedules of Rates prepared by the Employer.

4 Particular Specifications or the instructions of the Supervising Officer. Abbreviations Abbreviations used shall have the following meanings: BS British Standard BS EN European Standard CP Code of Practice CS Construction Standard GS General specification for Building IEC International Electrotechnical Commission ISO International Organization for Standardization Publication PS Particular specification PW Public Works SO Supervising Officer DEVB List Development Bureau current enforced List of Approved Suppliers of Materials and Specialist Contractors for Public Works.

5 Applications of specification Materials and workmanship specified in one Section of this GS shall apply to the same items in other Sections. Form of Contract The form of contract is either the General Conditions of Contract for Building Works, the General Conditions of Contract for Design and Build Contracts, the General Conditions of Contract for Term Contracts for Building Works, or such other General Conditions for Building Works as are specified and issued by the Government of Hong Kong Special Administrative Region, hereinafter referred to as the "Conditions". The Conditions include Clauses dealing specifically with the provision of plant, equipment, labour and the quality of workmanship and samples and testing.

6 This GS is written for use in conjunction with the Conditions and the Contractor shall be deemed to have knowledge of all relevant Clauses in the Conditions. All definitions in the Conditions shall be deemed to apply also to this GS. Government of Hong Kong The term "Government of Hong Kong" mentioned in this GS shall mean the Government of the Hong Kong Special Administrative Region. Supervising Officer "Supervising Officer" is the "Architect" or the "Maintenance Surveyor" or the Supervising Officer as respectively defined in the Conditions. British Standards European Standards and Codes of Practice "British Standards", "European Standards" and "Codes of Practice" shall be deemed to include all amendments, revisions and standards superseding the standards listed herein, current and published before the date of first tender invitation for the Contract unless otherwise specified.

7 In the case of Sections 1, 3, 5, 6, 7, 8, 15, 25 and 26 the stated BS, BS EN, CP and similar standards in Index 3 are to take preference over any later amendment, revision or superseded standard. For the Codes of Practice and Construction Standards Section 1 Preliminaries 1-2 issued by the Government of Hong Kong, the latest editions shall apply unless otherwise specified in Index 3. Equivalent International Standards may be used if approved by the SO. specification in Manufacturer's recommendations "Manufacturer's recommendations" mean those recommendations or instructions printed or in writing and produced by the manufacturer of any specified product current and published before the date of first tender invitation for the Contract.

8 Approval "Approval" or "approved" means the approval in writing by the SO but this shall not relieve the Contractor from responsibilities imposed by the Contract. Proprietary brand name products or materials The phrase or alternative products or materials having equivalent functions or performance shall be deemed to be included wherever products or materials are specified by proprietary brand names. Alternative products or materials of different brands or manufacture having equivalent functions or performance may substitute for the specified proprietary brand name products or materials if prior approval from the SO has been obtained.

9 If the Contractor intends to use the intellectual property rights of another party in performing his obligations under the Contract, appropriate licences shall be obtained from the relevant rights owners. Specified The term "specified" means the incorporation of a particular clause or alternative by specific reference in the Drawings, Particular specification , Bills of Quantities or Schedule of Rates prepared by the Employer. Where alternatives are given in the GS, the required alternative may be "specified". If it is not so specified the Contractor is at liberty to make his own choice from the stated list, or the Contractor may propose alternatives subject to the agreement and acceptance of the SO.

10 Regulations "Regulations" mean any Ordinance or Regulation published by Government of Hong Kong, byelaws of any local or duly constituted authority and rules or regulations of public bodies and companies which may be applicable to the Works. Equivalent standards and imperial sizes When products or materials to the appropriate standards are not available, products or materials conforming with equivalent standards (or performance) shall be acceptable subject to approval. When a material is available in metric size, an imperial size equivalent shall not be acceptable. If a material is unobtainable in metric size, a material of the nearest equivalent imperial size which will fully meet the specification may be substituted if prior approval has been obtained, but the rates will not be changed from those submitted for the materials specified.