GS 2006 Edition VOLUME 1 15 Feb 2007 - cedd.gov.hk

1 GENERAL. specification . FOR. CIVIL ENGINEERING. WORKS. VOLUME 1. 2006 Edition . The Government of the Hong Kong Special Administrative Region 2006 Edition The Government of the Hong Kong Special Administrative Region The 1992 Edition was first published in March 1992. First Reprint, April 1993 Second reprint, March 1994. Third reprint, July 1995 Fourth reprint, August 1996. Fifth reprint, December 1997 Sixth reprint, November 1998. Seventh reprint, March 2001 Eighth reprint, October 2002. The 2006 Edition was published in March 2007. Prepared by: Standards Unit, Civil Engineering and Development Department, Civil Engineering and Development Building, 101, Princess Margaret Road, Homantin, Kowloon, Hong Kong. Members of Steering Committee for the General specification for Civil Engineering Works: Assistant Director (Technical), CEDD (Chairman) Chief Engineer/Land Works, CEDD. Chief Geotechnical Engineer/LPM3, CEDD Technical Secretary 1, DSD. Chief Highway Engineer/R & D, HyD Chief Civil Engineer, HD.

2 Technical Secretary, NTE DevO, CEDD Chief Engineer/Design, WSD. Senior Engineer/Standards, CEDD (Secretary). This publication is available from: Publications Sales Unit Information Services Department Room 402, 4th Floor, Murray Building Garden Road, Central Hong Kong (Telephone No.: (852) 2537 1910). The book can be ordered both locally and overseas through the following channels: Visit the online Government Bookstore at Download the order form from the Information Services Department website at and submit the order direct online or by fax to (852) 2523 7195. By e-mail at Future amendments of this publication will be published on the website of the Civil Engineering and Development Department at Price in Hong Kong: HK$ (in set of 2 volumes). An additional bank charge of HK$60 or US$ is required per cheque made in currencies other than Hong Kong dollars. Cheques, bank drafts or money orders must be made payable to The Government of the Hong Kong Special Administrative Region 2.

3 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. 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.

4 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. 3. 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.

5 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. 4. 2006 Edition CONTENT OF VOLUME 1. SECTION 1. GENERAL. Page No. INTERPRETATION OF DOCUMENTS. Application of the General specification for Civil Engineering Works .. Abbreviations .. Glossary of terms .. Trials and approval .. British Standards, Codes of Practice and other standards .. Specifications in metric and imperial units .. Dimensions from Drawings .. PROGRAMME. Programme .. CONTRACTOR'S SUPERINTENDENCE. Surveyor .. Foreman for concrete work .. Supervision of piling works.

6 Particulars of agent and employees .. SAFETY. Safety .. WORK ON ROADS. Approval for temporary traffic arrangements and control .. Temporary traffic arrangements and control .. Particulars of temporary traffic arrangements and control .. Use of roads and footways .. Work on roads and footways .. Reinstatement of roads and footways .. CARE OF THE WORKS. Protection from water .. Protection from weather .. Protection of work .. 5. 2006 Edition Page No. DAMAGE AND INTERFERENCE. Damage and interference .. Watercourses and drainage systems .. Utilities .. Structures, roads and other property .. Access .. RECORDS. Records of wage rates .. Records of correspondence .. Records and reports .. LIAISON WITH OTHERS. Liaison with others .. SITE CLEANLINESS. Site cleanliness .. Prevention of mosquito breeding .. Prevention of dust .. MATERIALS AND EQUIPMENT. Materials and equipment provided by the Employer .. Materials .. TESTING. Quality assurance schemes.

7 Batches, samples and specimens .. Samples for testing .. Testing .. Compliance of a batch .. Raw records of tests and test reports .. WORKMANSHIP AND TOLERANCES. Workmanship .. Tolerances .. 6. 2006 Edition Page No. SITE ESTABLISHMENT. Use of the Site .. Submission of particulars .. Survey of the Site .. Fences and signs on the Site .. The Engineer's Site accommodation .. The Contractor's Site accommodation .. Site utilities and access .. Transport for the Engineer .. Clearance of the Site .. MEETINGS. Meetings .. PHOTOGRAPHS. Photographs .. APPENDIX STANDARDS. British Standards .. American Society for Testing and Materials (ASTM) Standards .. American Association of State Highway and Transportation Officials (AASHTO) Standard .. American Water Works Association (AWWA) Standards/Amercian National Standards Iinstitute (ANSI).. Construction Standards of the Government of the HKSAR (CS).. Swedish Standards (SIS) .. American Public Health Association (APHA) Standards.

8 European Standards Adopted As British Standards (BS EN) .. European Standards (EN) and/or International Organization for Standardization's Standards (ISO) Adopted As British Standards (BS EN ISO) .. Japanese Industrial Standards (JIS) .. International Organization for Standardization (ISO) .. Water Industry specification , Water Research Centre .. National Water Council, UK .. Australian/New Zealand Standard (AS/NZS) .. APPENDIX REQUIREMENTS FOR STEEL CONTAINER ROOM. General .. Equipment .. 7. 2006 Edition Page No. APPENDIX REQUIREMENTS FOR CURING TANK. General .. Equipment .. SECTION 2. SITE CLEARANCE. GENERAL. General requirements .. Pipes and manholes to be abandoned .. Earthworks .. SITE CLEARANCE. Demolition .. Pipes and cables .. Trees .. Reinstatement .. Materials and equipment for re-use and storage .. SECTION 3. LANDSCAPE SOFTWORKS AND ESTABLISHMENT. WORKS. GENERAL. General requirements .. Site clearance .. Earthworks .. Landscape hardworks.

9 Geotechnical works .. Weather and ground conditions .. Use of chemicals .. GLOSSARY OF TERMS. Landscape softworks .. Landscape hardworks .. Establishment works .. 8. 2006 Edition Page No. MATERIALS. Seedling trees .. Whip trees .. Light standard trees .. Standard trees .. Heavy standard trees .. Semi-mature trees .. Small shrubs .. Large shrubs .. Conifers .. Palms .. Bamboo .. Herbaceous plants .. Ground cover .. Climbers .. Containerised plants .. Grass seed .. Turf .. Sprigs .. Plant name .. Soil-mix .. Soil conditioner .. Mulch .. Mulch for hydroseeding .. Fertilizer .. Soil binder .. Stakes, ties and guys .. Protective fabric material .. SUBMISSIONS. Particulars of seed mixture, turf, sprigs, soil conditioner and water .. Particulars of hydroseeding .. Samples of materials .. HANDLING, STORAGE AND TRANSPORT. Handling and storage of rootballed stock .. Handling and storage of container grown and containerised stock .. Transport of plants.

10 Storage of plants .. Storage of trees and shrubs .. Handling and storage of turf and sprigs .. Storage of grass seed .. Storage of fertilizer .. PRE-PLANTING WORKS. Preparatory works .. Cleaning ground .. Ripping .. Contaminated ground .. Soiling .. Cultivation .. 9. 2006 Edition Page No. Scarifying .. Protection of prepared ground .. Removal of material .. PLANTING. General .. Use of excavated material .. Planting .. Staking, tying and guying .. Mulching .. Notch planting of seedlings .. Pit planting of seedlings, shrubs, whips, climbers, ground covers and herbaceous plants .. Pit planting of light standard and standard trees .. Pit planting of heavy standard tree and semi-mature trees .. Pit planting of bamboo, conifers and palms .. Pit planting on slopes .. GRASSING. Hydroseeding .. Hydroseeding Surface conditions for hydroseeding .. Application of hydroseeding .. Protective material .. Patching up .. Post-planting fertilizer .. Turfing.