appendix 1.1 standards

471 Pages·2016·3.47 MB·English

General Specification for Civil Engineering Works (GS), 2006 Edition
Volume 1 of 2

This electronic file is for reference only. When the
content of this electronic file is inconsistent with the

hard copy of the GS, 2006 Edition and the Amendments

issued, the hard copy of the GS, 2006 Edition and the

Amendments shall prevail.

(This Version is Continuously Updated to include Amendments issued)

This Electronic File has incorporated the following Amendments:-

Rev Issue Date Amendment Incorporated
First Issue March 2007 -
1 9 July 2007 Amendment No. 1/2007
2 27 December 2007 Amendment No. 2/2007
3 17 January 2008 Amendment No. 1/2008
4 12 June 2008 Amendment No. 2/2008
5 6 February 2009 Amendment No. 1/2009
6 26 August 2009 Amendment No. 3/2009
7 26 November 2009 Amendment No. 4/2009
8 2 February 2010 Amendment No. 1/2010
9 9 March 2010 Amendment No. 2/2010
10 15 April 2010 Amendment No. 3/2010
11 19 April 2010 Amendment No. 4/2010
12 9 March 2010 Amendment No. 1/2011
13 3 August 2011 Amendment No. 2/2011
14 5 April 2012 Amendment No. 1/2012
15 7 February 2013 Amendment No. 1/2013
16 14 June 2013 Amendment No. 2/2013
17 24 November 2014 Amendment No. 1/2014
18 28 December 2015 Amendment No. 1/2015
19 30 December 2016 Amendment No. 1/2016
GENERAL
SPECIFICATION
FOR
CIVIL ENGINEERING
WORKS
VOLUME 1
2006 Edition
香港特別行政區政府
The Government of the Hong Kong Special Administrative Region
GS (2006 Edition)
 The Government of the Hong Kong Special Administrative Region

The publication “General Specification for Civil Engineering Works, 2006 Edition” is available from :

Publications Sales Unit
Information Services Department
Room 626, 6/F, North Point Government Offices
333 Java Road, North Point
Hong Kong

and can be ordered both locally and overseas through the following channels:

• Visit the online Government Bookstore at www.bookstore.gov.hk

• Download the order form from the Information Services Department website at www.isd.gov.hk
and submit the order direct online or by fax to the Information Services Department at 2523 7195

• By e-mail at [email protected]

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GS (2006 Edition)

FOREWORD

The General Specification for Civil Engineering Works lays down the quality of materials,
the standards of workmanship, the testing methods and the acceptance criteria for civil engineering
works undertaken for the Government of the Hong Kong Special Administrative Region. Where
necessary, this General Specification should be supplemented by a particular specification.

The 2006 Edition of the General Specification comprises considerable greening of the
Eighth Reprint of the 1992 Edition (October 2002) according to the current green practices of the
construction industry. The text relating to "green measures" is printed in green colour in this
Edition with a view to making it easier for reader's reference. It was produced over a 15-month
period from March 2005 under the guidance of a Steering Committee comprising members from the
main Government departments involved in civil engineering works. The greening of each section
was undertaken by a works department with the appropriate expertise. The Standards Unit of Civil
Engineering and Development Department (CEDD) was responsible for the overall co-ordination of
comments received from departmental circulation, editing and production of the document.
Amd 1/2007

Sustainability is the prime objective of the 2006 Edition. Two new sections, viz.
Environmental Protection (Section 25) and Preservation and Protection of Trees (Section 26) have
been created. The original Section 22 for Railways Works has been deleted, as construction of
railways is no more the responsibility of works departments. The 2006 Edition comprises 26
sections and is posted on the CEDD Homepage on the Internet.

The General Specification will be updated continuously. The electronic files of the
sections affected by any amendment issued will be kept up-to-date on the CEDD Homepage.

September 2006

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GS (2006 Edition)
GENERAL SPECIFICATION FOR
CIVIL ENGINEERING WORKS

CONTENTS

VOLUME 1
SECTION 1 GENERAL
2 SITE CLEARANCE
3 LANDSCAPE SOFTWORKS AND ESTABLISHMENT WORKS
4 FENCING
5 DRAINAGE WORKS
6 EARTHWORKS
7 GEOTECHNICAL WORKS
8 PILING WORKS
9 CARRIAGEWAYS: SUB-BASE MATERIAL AND BITUMINOUS MATERIALS
10 CONCRETE CARRIAGEWAYS
11 MISCELLANEOUS ROADWORKS
12 TRAFFIC SIGNS, ROAD MARKINGS AND ROAD STUDS

VOLUME 2
SECTION 13 WORK FOR ELECTRICAL AND MECHANICAL INSTALLATIONS
14 FORMWORK AND FINISHES TO CONCRETE
15 STEEL REINFORCEMENT
16 CONCRETE AND JOINTS IN CONCRETE
17 PRESTRESSING
18 STEELWORK
19 HANDRAILING, LADDERS, STAIRS AND FLOORING
20 BRIDGEWORKS
21 MARINE WORKS
22 WATER SUPPLY PIPEWORKS
23 WATER RETAINING STRUCTURES
24 BUILDING WORKS
25 ENVIRONMENTAL PROTECTION
26 PRESERVATION AND PROTECTION OF TREES

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CONTENT OF VOLUME 1

SECTION 1

GENERAL

INTERPRETATION OF DOCUMENTS

1.01 Application of the General Specification for Civil Engineering Works ....................................... 1.3
1.02 Abbreviations ................................................................................................................................ 1.3
1.03 Glossary of terms .......................................................................................................................... 1.5
1.04 Trials and approval ....................................................................................................................... 1.5
1.05 British Standards, European Standards adopted as British Standards, Codes of Practice
and other standards ....................................................................................................................... 1.6
1.06 Specifications in metric and imperial units................................................................................... 1.6
1.07 Dimensions from Drawings .......................................................................................................... 1.6

PROGRAMME

1.08 Programme.................................................................................................................................... 1.6

CONTRACTOR'S SUPERINTENDENCE

1.09 Surveyor........................................................................................................................................ 1.7
1.10 Foreman for concrete works ......................................................................................................... 1.7
1.11 Supervision of piling works .......................................................................................................... 1.7
1.12 Particulars of Agent and employees ............................................................................................. 1.8

CONSTRUCTION SAFETY AND SAFETY OF THE PUBLIC

1.13 Construction safety and safety of the public ................................................................................. 1.9

WORK ON ROADS

1.14 Approval for temporary traffic arrangements and control .......................................................... 1.10
1.15 Temporary traffic arrangements and control............................................................................... 1.10
1.16 Particulars of temporary traffic arrangements and control ......................................................... 1.11
1.17 Use of roads and footways .......................................................................................................... 1.11
1.18 Work on roads and footways ...................................................................................................... 1.11
1.19 Reinstatement of roads and footways ......................................................................................... 1.12

CARE OF THE WORKS

1.20 Protection from water ................................................................................................................. 1.12
1.21 Protection from weather ............................................................................................................. 1.12
1.22 Protection of works ..................................................................................................................... 1.13

DAMAGE AND INTERFERENCE

1.23 Damage and interference ............................................................................................................ 1.13
1.24 Watercourses and drainage systems ............................................................................................ 1.13
1.25 Utilities ....................................................................................................................................... 1.14
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1.26 Structures, roads and other property ........................................................................................... 1.16
1.27 Access ......................................................................................................................................... 1.16

RECORDS

1.28 Records of wage rates ................................................................................................................. 1.16
1.29 Records of correspondence ......................................................................................................... 1.16
1.30 Records and reports .................................................................................................................... 1.16

LIAISON WITH OTHERS

1.31 Liaison with others ..................................................................................................................... 1.17

SITE CLEANLINESS

1.32 Site cleanliness ........................................................................................................................... 1.17
1.33 Prevention of mosquito breeding ................................................................................................ 1.18
1.34 Prevention of dust ....................................................................................................................... 1.18

MATERIALS AND EQUIPMENT

1.35 Materials and equipment provided by the Employer .................................................................. 1.19
1.36 Materials ..................................................................................................................................... 1.19

TESTING

1.37 Quality assurance schemes ......................................................................................................... 1.19
1.38 Batches, samples and specimens ................................................................................................ 1.20
1.39 Samples for testing ..................................................................................................................... 1.20
1.40 Testing ........................................................................................................................................ 1.22
1.41 Compliance of a batch ................................................................................................................ 1.23
1.42 Raw records of tests and test reports .......................................................................................... 1.23

WORKMANSHIP AND TOLERANCES

1.43 Workmanship .............................................................................................................................. 1.24
1.44 Tolerances ................................................................................................................................... 1.24

SITE ESTABLISHMENT

1.45 Use of the Site ............................................................................................................................. 1.24
1.46 Submission of particulars ........................................................................................................... 1.25
1.47 Survey of the Site ....................................................................................................................... 1.25
1.48 Fences and signs on the Site ....................................................................................................... 1.25
1.49 The Engineer's Site accommodation ........................................................................................... 1.25
1.50 The Contractor's Site accommodation ........................................................................................ 1.26
1.51 Site utilities and access ............................................................................................................... 1.26
1.52 Transport for the Engineer .......................................................................................................... 1.26
1.53 Clearance of the Site ................................................................................................................... 1.27

MEETINGS

1.54 Meetings ..................................................................................................................................... 1.27

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PHOTOGRAPHS

1.55 Photographs ................................................................................................................................ 1.28

APPENDIX 1.1
STANDARDS

1.1.1 BRITISH STANDARDS ............................................................................................................ 1.29
1.1.2 AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) STANDARDS ........... 1.43
1.1.3 AMERICAN ASSOCIATION OF STATE HIGHWAY AND TRANSPORTATION
OFFICIALS (AASHTO) STANDARD ...................................................................................... 1.45
1.1.4 AMERICAN WATER WORKS ASSOCIATION (AWWA) STANDARDS/ AMERICAN
NATIONAL STANDARDS INSTITUTE (ANSI) ..................................................................... 1.45
1.1.5 CONSTRUCTION STANDARDS OF THE GOVERNMENT OF THE HKSAR .................... 1.45
1.1.6 SWEDISH STANDARDS .......................................................................................................... 1.46
1.1.7 AMERICAN PUBLIC HEALTH ASSOCIATION (APHA) STANDARDS ............................. 1.46
1.1.8 EUROPEAN STANDARDS ADOPTED AS BRITISH STANDARDS (BS EN) ..................... 1.46
1.1.9 EUROPEAN STANDARDS (EN) and/or INTERNATIONAL ORGANIZATION FOR
STANDARDIZATION (ISO) STANDARDS ADOPTED AS BRITISH STANDARDS
(BS EN ISO) ............................................................................................................................... 1.50
1.1.10 JAPANESE INDUSTRIAL STANDARDS (JIS) ....................................................................... 1.53
1.1.11 INTERNATIONAL ORGANIZATION FOR STANDARDIZATION (ISO)
STANDARDS............................................................................................................................. 1.53
1.1.12 WATER INDUSTRY SPECIFICATION, WATER RESEARCH CENTRE ............................... 1.53
1.1.13 NATIONAL WATER COUNCIL, UK ....................................................................................... 1.53
1.1.14 AUSTRALIAN/NEW ZEALAND STANDARDS (AS/NZS) ................................................... 1.53
1.1.15 中華人民共和國行業標準 ........................................................................................................ 1.53
1.1.16 CANADIAN STANDARD ........................................................................................................ 1.54

APPENDIX 1.2
REQUIREMENTS FOR STEEL CONTAINER ROOM

1.2.1 General........................................................................................................................................ 1.55
1.2.2 Equipment ................................................................................................................................... 1.55

APPENDIX 1.3
REQUIREMENTS FOR CURING TANK

1.3.1 General........................................................................................................................................ 1.56
1.3.2 Equipment ................................................................................................................................... 1.56
1.3.3 Maintenance ................................................................................................................................ 1.56

SECTION 2
SITE CLEARANCE

GENERAL

2.01 General requirements .................................................................................................................... 2.3
2.02 Pipes and manholes to be abandoned ........................................................................................... 2.3
2.03 Earthworks .................................................................................................................................... 2.3

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SITE CLEARANCE

2.04 Demolition .................................................................................................................................... 2.3
2.05 Pipes and cables ............................................................................................................................ 2.3
2.06 Trees ............................................................................................................................................. 2.3
2.07 Reinstatement ............................................................................................................................... 2.3
2.08 Materials and equipment for re-use and storage ........................................................................... 2.4

SECTION 3
LANDSCAPE SOFTWORKS AND ESTABLISHMENT WORKS

GENERAL

3.01 General requirements .................................................................................................................... 3.3
3.02 Site clearance ................................................................................................................................ 3.3
3.03 Earthworks .................................................................................................................................... 3.3
3.04 Landscape hardworks ................................................................................................................... 3.3
3.05 Geotechnical works ...................................................................................................................... 3.3
3.06 Weather and ground conditions .................................................................................................... 3.3
3.07 Use of chemicals ........................................................................................................................... 3.3

GLOSSARY OF TERMS

3.08 Landscape softworks .................................................................................................................... 3.3
3.09 Landscape hardworks ................................................................................................................... 3.3
3.10 Establishment works ..................................................................................................................... 3.3

MATERIALS

3.11 Seedling trees ................................................................................................................................ 3.4
3.12 Whip trees ..................................................................................................................................... 3.4
3.13 Light standard trees ...................................................................................................................... 3.4
3.14 Standard trees................................................................................................................................ 3.5
3.15 Heavy standard trees ..................................................................................................................... 3.5
3.16 Semi-mature trees ......................................................................................................................... 3.5
3.17 Small shrubs ................................................................................................................................. 3.6
3.18 Large shrubs.................................................................................................................................. 3.6
3.19 Conifers ........................................................................................................................................ 3.6
3.20 Palms ............................................................................................................................................ 3.7
3.21 Bamboos ....................................................................................................................................... 3.7
3.22 Herbaceous plants ......................................................................................................................... 3.7
3.23 Ground covers ............................................................................................................................... 3.8
3.24 Climbers........................................................................................................................................ 3.8
3.25 Containerised plants ..................................................................................................................... 3.8
3.26 Grass seed ..................................................................................................................................... 3.8
3.27 Turf ............................................................................................................................................... 3.9
3.28 Sprigs ............................................................................................................................................ 3.9
3.29 Plant name .................................................................................................................................... 3.9
3.30 Soil-mix ........................................................................................................................................ 3.9
3.31 Soil conditioner ........................................................................................................................... 3.10
3.32 Mulch .......................................................................................................................................... 3.10
3.33 Mulch for hydroseeding .............................................................................................................. 3.10
3.34 Fertilizer...................................................................................................................................... 3.10
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