Hk 50 Us 6 - Cedd

2 The Government of the Hong Kong Special Administrative RegionFirst published, March 1992Reprinted, April 1993Second reprint, March 1994Third reprint, July 1995Fourth reprint, August 1996Fifth reprint, December 1997Sixth reprint, November 1998Seventh reprint with amendments promulgated under Corrigendum Nos. 1/93, 1/94, 2/94, 1/95, 1/96,2/96, 1/97, 2/97, 1/98, 2/98, 1/99, 2/99 and 1/2000 incorporated, March 2001Eighth reprint with all amendments incorporated in the seventh reprint and with amendmentspromulgated under Corrigendum Nos. 1/2001, 2/2001, 3/2001, 1/2002 and 2/2002 incorporated,October 2002Prepared by:Standards Unit,Civil Engineering Department,Civil Engineering Building,101 Princess Margaret Road,Homantin, Kowloon,Hong Kong.Steering Committee members:R.H. Pilling (Chairman)C.L. AuT.K. CheungH.S. KwongH. SandersC.K. Au YongD.J. HowellsI.M. MillerK.Y. TangW.S. ChanT.L. HsuK.P. MokH.S. TseThis publication is available from:Government Publications Centre,Ground Floor, Low Block,Queensway Government Office,66 Queensway,Hong Kong.Future amendments of this publication will be published on the website of the Civil EngineeringDepartment at http://www. info.gov.hk/ced/.Overseas orders should be placed with:Publications Sales Section,Information Services Department,Room 402, 4th Floor, Murray Building,Garden Road, Central,Hong Kong.Price in Hong Kong: HK 173.00 (in set of 3 volumes)Price overseas: US 33.00 (including surface postage)An additional bank charge of HK 50 or US 6.50 is required per cheque made in currencies otherthan Hong Kong dollars.Cheques, bank drafts or money orders must be made payable toThe Government of the Hong Kong Special Administrative Region.

3FOREWORDThis Specification lays down the quality of materials, the standards ofworkmanship, the testing methods and the acceptance criteria for civil engineeringworks undertaken for the Hong Kong Government. It supersedes “Public WorksDepartment, Civil Engineering Office and Highways Office General Specification forCivil Engineering Works, 1977 Edition” and “Water Supplies Department, GeneralSpecification for Civil Engineering Works, 1987 Edition”.The Specification is to be cited as “General Specification for Civil EngineeringWorks, 1992 Edition (Hong Kong Government)”. It is compatible with “GeneralConditions of Contract for Civil Engineering Works, 1990 Edition (Hong KongGovernment)” and “Standard Method of Measurement for Civil Engineering Works,1992 Edition (Hong Kong Government)”. Where necessary, it should besupplemented by a Particular Specification.This new Specification was produced over a six-year period under theguidance of a Steering Committee which comprised members from all the mainGovernment departments concerned with the execution of civil engineering works.The drafting of each Section was carried out by a Working Party consisting ofindividuals who possessed the appropriate knowledge and expertise. Drafts of theSections were circulated for comment inside and outside the Government beforefinalization. The published document therefore takes account of recent technologicaladvances and their application to civil engineering works in Hong Kong. The overallco-ordination for the document, and its final editing and production, were theresponsibility of the Standards Unit of the Civil Engineering Department.March 1992

4GENERAL SPECIFICATION FORCIVIL ENGINEERING WORKSCONTENTSVOLUME 1SECTION 1GENERAL2SITE CLEARANCE3LANDSCAPE SOFTWORKS AND ESTABLISHMENT WORKS4FENCING5DRAINAGE WORKS6EARTHWORKS7GEOTECHNICAL WORKS8PILING WORKSVOLUME 2SECTION 9CARRIAGEWAYS: SUB-BASE MATERIAL AND BITUMINOUSMATERIALS10CONCRETE CARRIAGEWAYS11MISCELLANEOUS ROADWORKS12TRAFFIC SIGNS, ROAD MARKINGS AND ROAD STUDS13WORK FOR ELECTRICAL AND MECHANICAL INSTALLATIONS14FORMWORK AND FINISHES TO CONCRETE15STEEL REINFORCEMENT16CONCRETE AND JOINTS IN CONCRETE17PRESTRESSINGVOLUME 3SECTION 18STEELWORK19HANDRAILING, LADDERS, STAIRS AND FLOORING20BRIDGEWORKS21MARINE WORKS22RAILWAY WORKS23WATER SUPPLY PIPEWORKS24WATER RETAINING STRUCTURES25BUILDING WORKS

5CONTENTS OF VOLUME 3SECTION 18STEELWORKPageNo.GENERAL18.0118.0218.03Steelwork . 37Protection of steelwork. 37Amendments to BS 5400: Part 6. 118.1218.1318.1418.1518.16Structural steel . 38Rivet steel . 39Steel for shear connectors. 39Bolts, screws, nuts and washers. 39Welding consumables . 39Rolled steel pins.39Steel castings and cast steel pins . 40Steel forgings and forged steel pins. 40Stainless steel. 40Cast iron. 40Grout for column bases. 41Lubricant for nut threads of HSFG bolts . 41Paint for steelwork. .2418.2518.2618.2718.28Particulars of steel . 41Particulars of workshop drawings . 42Particulars of delivery of steelwork. 42Particulars of method of erecting steelwork . 42Welder certificates. 43Particulars of welding procedures . 43Particulars of stud welding, flame cutting and shearing procedures . 44Particulars of vent holes for galvanizing . 44Particulars of method of non-destructive testing. 44Particulars of inspecting authority and testing consultant. 44Particulars of paint. 45Samples of materials. 45TRIALS18.2918.3018.3118.32Procedure trials for welding, flame cutting and shearing .Inspection of procedure trials for welding, flame cutting and shearing .Results of procedure trials for welding, flame cutting and shearing .Approved procedures for welding, flame cutting and shearing.45464646

ement of welding, flame cutting and shearing .Changes in procedures for welding, flame cutting and shearing.Records of procedure trials for welding, flame cutting and shearing .Painting trials .Results of painting trials .Commencement of painting .Changes in materials and methods of application for painting.46464647474747HANDLING, STORAGE AND TRANSPORT OF MATERIALS18.4018.4118.42Changes in materials and methods of application for painting. 47Handling and transport of steelwork . 47Storage of steelwork . 48FABRICATION OF 8.5118.52Fabrication of steelwork .Welding, heating and cutting .Length of bolts .Length of threads .Use of nuts .Use of washers .Tightening of bolts .Tightening of HSFG bolts .Defects in steelwork .Approval of fabricated steelwork .48494949494949505151PREPARATION OF STEELWORK eaning of steelwork and coated surfaces .Preparation of steelwork surfaces .Blast cleaning of steelwork .Acid-pickling of steelwork .Mechanical cleaning of steelwork .Flame cleaning of steelwork .Cleaning of bolts, nuts and washers .Approval of surface preparation .5152525253535353METAL COATINGS TO STEELWORK18.61Metal coatings to steelwork . 53PAINTING STEELWORK18.6218.6318.6418.6518.66Painting systems for steelwork .Application of paint to steelwork .Working conditions for painting .Priming and overcoating time limits .Stripe coats to steelwork .5455555656

7PageNo.18.6718.6818.69Paint coats to steelwork . 56Etch primers and blast primers . 57Repairs to damaged areas of paint . 57PROTECTION OF JOINTS IN STEELWORK18.7018.7118.7218.7318.7418.75Protection of HSFG bolted joints .Protection of other shop-bolted joints .Protection of other site-bolted joints .Protection of welded joints .Joints made after coating the parent material .Sealing of joints in steelwork .575858585858PROTECTION OF SPECIAL SURFACES OF STEELWORK18.7618.7718.78Protection of hollow steel sections . 58Protection of bearing surfaces for bridge bearings . 59Protection of uncoated steelwork surfaces . 59ERECTION OF STEELWORK18.7918.8018.8118.8218.83Temporary supports and fastenings to steelwork .Alignment of steelwork .Foundation bolts for steelwork .Supporting devices for steelwork .Bedding and grouting of column bases .5959596060TOLERANCES18.8418.8518.86Tolerances: fabrication of steelwork . 60Tolerances: foundation bolts . 60Tolerances: erection of steelwork . 60TESTING CONSULTANT18.87Testing consultant . 61TESTING: TESTS ON STEELWORK AT MANUFACTURER’SWORKS18.88Testing: tests on steelwork at manufacturer’s works . 61TESTING: STEELWORK18.8918.90Batch: steelwork . 61Samples: steelwork . 61

.99Testing: steelwork .Reports of tests on steelwork .Non-compliance: steelwork .Samples: steel .Testing: steel .Testing: welds .Testing: stud shear connectors and rivets .Testing: fabrication tolerances .Testing: repairs .626262626263646464SECTION 19HANDRAILING, LADDERS, STAIRS AND al requirements .Fencing .Pedestrian guardrailing .Materials for grout .Steelwork .Vehicular parapets el .Stainless steel .Aluminium .Bolts, nuts, screws, washers and rivets .Cement mortar .6767686869DESIGN BY CONTRACTOR19.12Design by Contractor . 69FABRICATION OF HANDRAILING, LADDERS, STAIRS 019.21Fabrication of steelwork .Galvanizing to steel .Welding steel .Fabrication of handrailing .Fabrication of ladders .Fabrication of stairs .Fabrication of flooring .Fabrication of toe plates .Fabrication of safety chains .696969697070707070

9PageNo.SUBMISSIONS19.2219.23Particulars of handrailing, stairs, ladders and flooring . 71Samples of materials . 71STORAGE OF MATERIALS19.24Storage of handrailing, ladders, stairs and flooring . 72INSTALLATION OF HANDRAILING, LADDERS, STAIRS, ANDFLOORING19.2519.26Installation of handrailing, ladders and stairs . 72Installation of flooring . 72TOLERANCES19.27Tolerances: handrailing, ladders, stairs and flooring . 72SECTION 20BRIDGEWORKSPART 1: WATERPROOFINGMATERIALS20.0120.0220.03Prefabricated sheeting . 75Bentonite panels . 75Bituminous paint . 76SUBMISSIONS20.0420.05Particulars of waterproofing systems . 76Samples of materials for waterproofing systems . 76DELIVERY AND STORAGE OF MATERIALS20.0620.07Delivery of bentonite panels . 77Storage of materials for waterproofing systems. 77

10PageNo.INSTALLATION OF WATERPROOFING SYSTEMS20.0820.0920.1020.11Installation of waterproofing systems .Installation of prefabricated sheeting .Installation of bentonite panels .Bituminous paint waterproofing systems .77777778PART 2: BRIDGE BEARINGSGLOSSARY OF TERMS20.1220.13Schedule of bridge bearings . 79Type of Bridge bearing . 79MATERIALS20.1420.1520.16Holding down bolts for bridge bearings . 79Cement mortar, grout and adhesive for bridge bearings . 79Dowel bars for bridge bearings . 79DESIGN OF BRIDGE BEARINGS20.1720.1820.1920.2020.2120.2220.23Design of bridge bearings .Design of sliding bearings .Design of elastomeric bearings .Design of guides for bridge bearings .Design of fixings for bridge bearings .Protective coatings to bridge bearings .Marking of bridge bearings .79808080808080SUBMISSIONS20.24Particulars of bridge bearings . 81STORAGE OF MATERIALS20.25Storage of bridge bearings . 82INSTALLATION OF BRIDGE BEARINGS20.26Installation of bridge bearings . 82TOLERANCES20.27Tolerances: bridge bearings . 82

11PageNo.TESTING: BRIDGE BEARINGS - GENERALREQUIREMENTS20.2820.29Batch: bridge bearings . 83Testing: bridge bearings . 83TESTING: FRICTION TEST FOR BRIDGE BEARINGS20.3020.3120.32Samples: friction test for bridge bearings . 83Testing: friction test for bridge bearings . 83Compliance criteria: friction test for bridge bearings . 83TESTING: BRIDGE BEARINGS OTHER THAN LASTOMERICBEARINGS20.3320.3420.35Samples: bridge bearings other than elastomeric bearings . 84Testing: bridge bearings other than elastomeric bearings . 84Compliance criteria: bridge bearings other than elastomeric bearings . 84TESTING: ELASTOMERIC BEARINGS20.3620.3720.38Samples: elastomeric bearings . 84Testing: elastomeric bearings . 84Compliance criteria: elastomeric bearings . 85PART 3: VEHICULAR PARAPETSMATERIALS20.3920.4020.41Vehicular parapets . 86Holding down bolts for vehicular parapets . 86Grout for vehicular parapets . 86SUBMISSIONS20.42Samples of materials for vehicular parapets . 87STORAGE OF MATERIALS20.43Storage of vehicular parapets . 87INSTALLATION OF VEHICULAR PARAPETS20.44Installation of vehicular parapets . 87