1、BS 9124:2008Specification for steel and aluminium access cover systems with over 1 m clear openingICS 13.060.01NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDPublishing and copyright informationThe BSI copyright notice displayed in this document indicates when
2、the document was last issued. BSI 2008ISBN 978 0 580 57176 3The following BSI references relate to the work on this standard:Committee reference B/505Draft for comment 07/30151811 DCPublication historyFirst published August 2008Amendments issued since publicationAmd. no. Date Text affectedBS 9124:20
3、08 BSI 2008 iBS 9124:2008ContentsForeword iiIntroduction 11 Scope 12 Normative references 13 Terms and definitions 24 Materials 55 Design 76 Structural performance 127 Verification 138 Marking 16AnnexesAnnex A (informative) Information to be supplied in an enquiry or order 17Annex B (normative) Test
4、 to determine the USRV and PSRV of access cover systems 18Annex C (normative) Guidance notes and warning notes for the installation and operation of access cover systems 22Bibliography 24List of figuresFigure 1 Clear opening 3Figure 2 Total clearance 3Figure 3 Typical apparatus for the water ingress
5、 test 14Figure 4 Typical apparatus for air-tightness test 15Figure B.1 Test locations 19List of tablesTable 1 Polished Slip/skid Resistance Values 9Summary of pagesThis document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 24, an inside back cover and a back cover.BS 91
6、24:2008ii BSI 2008ForewordPublishing informationThis British Standard is published by BSI and came into effect on 29 August 2008. It was prepared by Technical Committee B/505, Wastewater engineering. A list of organizations represented on this committee can be obtained on request to its secretary. R
7、elationship with other publicationsThis standard is complementary to BS EN 124, which specifies requirements for gully tops and manhole tops with a clear opening up to and including 1 m, for use in vehicular and pedestrian areas. The 1994 edition of EN 124 does not include requirements for the slip/
8、skid resistance of manhole tops or gully tops. However, European Commission mandate M/118 “Wastewater engineering products”, given to CEN under the EU Construction Products Directive (89/106/EEC) for a “harmonized” European Standard for manhole tops and gully tops, requires the skid resistance of co
9、vers for manhole tops to be included as a performance characteristic. This is being addressed in the current revision of EN 124:1994, to which the United Kingdom is contributing under the supervision of B/505. Accordingly B/505 gratefully acknowledges the contributions made by the Health and Safety
10、Executive, the County Surveyors Society and the Highways Agency to the development of the provisions for slip/skid resistance in this British Standard.Information about this documentFor an enquiry or order to be fully understood it is essential that the manufacturer be given the information set out
11、in Annex A.Attention is drawn to the fact that cover systems under the scope of this British Standard are intended only to facilitate access to underground chambers.Product certification/inspection/testing Users of this British Standard are advised to consider the desirability of third-party certifi
12、cation/inspection/ testing of product conformity with this British Standard. Users seeking assistance in identifying appropriate conformity assessment bodies or schemes may ask BSI to forward their enquiries to the relevant association.Presentational conventionsThe provisions of this standard are pr
13、esented in roman (i.e. upright) type. Its requirements are expressed in sentences in which the principal auxiliary verb is “shall”.Commentary, explanation and general informative material is presented in smaller italic type, and does not constitute a normative element.Contractual and legal considera
14、tionsThis publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations. BSI 2008 1BS 9124:2008IntroductionProducts under the scope of this British
15、 Standard are normally bespoke and so it is inappropriate for the evaluation of conformity to be verified by systematic examination of the extent to which they fulfil specified requirements. Therefore, although type tests are specified for all requirements, they fall into three categories.1. Calcula
16、tion in accordance with established method (e.g. structural performance).2. Evaluation of a particular material or design element (e.g. slip/skid or sealing).3. Measurement (e.g. design dimensions).Some requirements (e.g. design dimensions) are absolute, in that every product needs to conform to the
17、 specified requirement.1 ScopeThis British Standard specifies requirements for access cover systems manufactured from steel or aluminium and with a clear opening greater than 1 m for installations within areas subject to pedestrian and/or slow moving vehicular traffic, for use as covers over chamber
18、s and ducts. NOTE For clear openings up to 1 m, BS EN 124 applies.This standard establishes definitions; materials; design; structural performance; technical documentation; installation and operating guidance notes; warning notes; testing requirements; verification and marking of such access cover s
19、ystems. 2 Normative referencesThe following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.BS EN 1991, Eurocode
20、 1: Actions on structuresBS EN 1993, Eurocode 3: Design of steel structuresBS EN 1999, Eurocode 9: Design of aluminium structuresBS EN 287-1, Qualification test of welders Fusion welding Part 1: SteelsBS EN 287-2, Approval testing of welders for fusion welding Part 2: Aluminium and its alloysBS EN 5
21、71-1, Non-destructive testing Penetrant testing Part 1: General principlesBS EN 1386, Aluminium and aluminium alloys Tread plate SpecificationsBS EN 1418, Welding personnel. Approval testing of welding operators for fusion welding and resistance weld setters for fully mechanized and automatic weldin
22、g of metallic materialsBS EN 10025, Hot rolled products of structural steelsBS 9124:20082 BSI 2008BS EN 10056, Specification for structural steel equal and unequal anglesBS EN 10088, Stainless steelsBS EN 10130, Cold-rolled low-carbon steel flat products for cold forming Technical delivery condition
23、sBS EN 10210-1, Hot finished structural hollow sections of non-alloy and fine grain steels Part 1: Technical delivery conditionsBS EN 10219-1, Cold formed welded structural hollow sections of non-alloy and fine grain steels Part 1: Technical delivery conditionsBS EN 13036-4, Road and airfield surfac
24、e characteristics Test methods Part 4: Method for measurement of slip/skid resistance of a surface The pendulum testBS EN ISO 1461, Hot dip galvanized coatings on fabricated iron and steel articles Specifications and test methodsBS EN ISO 14554, Quality requirements for welding Resistance welding of
25、 metallic materialsBS EN ISO 15609, Specification and qualification of welding procedures for metallic materials Welding procedure specificationDD ENV 12633, Method of determination of unpolished and polished slip/skid resistance value3 Terms and definitions For the purpose of this standard, the fol
26、lowing terms and definitions apply.3.1 access cover single plate capable of being removed from a frame, or hinged to a frame, allowing access to an underground chamber3.2 frame fixed part of the access cover system that houses the cover3.3 access cover systemassembly of removable or hinged access co
27、ver elements supported by a removable structural frame allowing clear access to a chamber or similar3.4 access cover elementconstituent part of the access cover system which may include all or any of the following: the frame, the removable cover, the removable support beams, the support pockets, the
28、 hinged cover, the lift assist mechanism, the seals and the locks3.5 safety gridprotective frame below an access cover or access cover element which allows visual inspection of the chamber but provides protection against falls of persons or materials3.6 clearancethe gap between two adjacent access c
29、overs BSI 2008 3BS 9124:20083.7 clear opening (CO)the diameter of the largest circle that can be inscribed within the clear area of the frameNOTE The clear opening is shown in Figure 1. 3.8 total clearancethe sum of the maximum individual clearances between adjacent elements of the frame and access
30、covers in any one direction NOTE The total clearance is shown in Figure 2. Figure 1 Clear opening1 = fixed supports2 = removable supportsCO CO CO1CO2Figure 2 Total clearancea = a1+ a2a = a1+ a2+ a3+ a4a = a1+ a2+ a3Keya = total clearance where a1, a2, a3, a4, etc., are the individual clearancesa1a2a
31、1a2a3a4a1a2a3BS 9124:20084 BSI 20083.9 spandistance between centres of adjacent supports3.10 airtight coveraccess cover system capable of preventing the passage of odours at normal atmospheric pressure3.11 watertight coveraccess cover system capable of preventing the ingress of water3.12 pressure ti
32、ght cover (hydraulic surcharge)access cover system capable of resisting hydraulic pressure from within the chamber3.13 normal conditionswet, rarely dry conditions and a slightly aggressive chemical environment, i.e. normal conditions for domestic sewage and treated industrial effluent, and for most
33、natural soils and groundwaterNOTE A “wet, rarely dry” condition for concrete surfaces subject to long term water contact and a “slightly aggressive chemical environment” are defined in EN 206-1 as classes XC2 and XA1 respectively. More severe environments are also defined. If more severe conditions
34、are expected, additional requirements for corrosion protection may be necessary, see Annex A.3.14 debris gasketintegral element within the cover assembly to prevent or limit the ingress of detritus that may otherwise prevent the operation of the cover3.15 PSRV polished slip resistance value NOTE Thi
35、s value is also used in relation to skid resistance.3.16 USRVunpolished slip resistance valueNOTE This value is also used in relation to skid resistance.3.17 macrotextured surfacearea of an access cover system with a distinct raised pattern or studding, which is produced by casting, rolling or machi
36、ning the face of the area BSI 2008 5BS 9124:20084 Materials 4.1 GeneralAccess cover systems shall be suitable for use in normal conditions. NOTE 1 If covers are to be used in more aggressive/severe conditions, additional requirements for corrosion protection may be necessary.NOTE 2 If sealed covers
37、are to be used in more aggressive/severe conditions, special requirements for the durability of the seal may be necessary. Access covers, frames and all structural elements shall be made from any of the following materials: a) aluminium conforming to 4.2;b) mild steel conforming to 4.3;c) stainless
38、steel conforming to 4.4.Operating systems for lift assistance and security locks may be made from additional materials; however, such materials shall have durability and corrosion properties compatible with those of the access cover and frame.4.2 Aluminium alloy access cover systemsAluminium access
39、cover systems for use in normal conditions shall be fabricated from aluminium EN-AW 5052 or marine grade aluminium grade 5086-H34 and 6063-T5, 6063-T6 conforming to BS EN 1386 (see Annex A).Where aluminium access cover systems are to be used in contact with other metals or cementitious materials, co
40、rrosion protection shall be applied to the aluminium surface (see 4.6.4).NOTE See BS 8118 for aluminium in contact with concrete.4.3 Mild steel access cover systemsMild steel access cover systems shall be fabricated from steel conforming to BS EN 10025, BS EN 10210-1, BS EN 10219-1, BS EN 10130 or B
41、S EN 10056. Mild steel access cover systems shall be made resistant to corrosion in accordance with 4.6, unless specified otherwise by the purchaser (see Annex A).4.4 Stainless steel access cover systemsStainless steel access cover systems shall be fabricated from austenitic stainless steel grades 1
42、.4301 or 1.4401, conforming to BS EN 10088. If the stainless steel surface is given a decorative finish the treatment shall not be detrimental to the corrosion or slip resistance of the stainless steel.NOTE For normal conditions no surface corrosion protection system is required for stainless steel.
43、 Post fabrication finishing processes are permitted, providing they do not provoke corrosion.BS 9124:20086 BSI 20084.5 Dissimilar metals in combination with each otherWhere the use of dissimilar metals in combination with each other could affect the corrosion or structural performance of an access c
44、over system, a durable isolating medium shall be used to prevent contact of the dissimilar metals. 4.6 Corrosion protection4.6.1 General Corrosion protection, where specified (see Annex A), shall apply to all access cover systems. NOTE Additional coatings may be applied for aesthetic purposes. Such
45、coatings can give a degree of corrosion protection.4.6.2 Hot dip galvanizing (mild steel)Corrosion resistance of mild steel shall be achieved by hot dip galvanizing in accordance with BS EN ISO 1461. All sharp edges resulting from galvanizing shall be removed.After the hot dip galvanizing process it
46、 might be necessary to straighten the cover or frame, to overcome any distortion induced during the galvanizing process. This straightening process shall not affect the integrity of the coating or the structural stability of the cover. 4.6.3 Weld protection of stainless steel Corrosion resistance of
47、 welds in stainless steel shall be achieved by a passivation process.Prior to passivation all parts shall be inspected for the presence of contaminants such as grease, oil, lubricants, forming compound, cutting fluids, wax markings as well as metallic residue and other contaminants which would affec
48、t the passivation process. Such contaminates shall be removed before passivation.NOTE Passivation is the spontaneous formation of a hard non-reactive surface film that inhibits further corrosion. This layer is usually an oxide or nitride that is a few atoms thick. The passivation process comprises t
49、he total immersion of the component(s) in NaOH and citric acid followed by immersion in nitric acid (up to 20% at 49 C) and finally followed by a water rinse. This process will restore the film, remove metal particles, dirt, and welding generated compounds (ex. oxides).4.6.4 Aluminium in contact with cementitious materialsAluminium in contact with cementitious materials shall be protected against corrosion by the application of a barrier coating.NOTE See BS 8118-1 and BS 8118-2 for more inform
