1、 g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58ICS 81.040.20Glazing for buildings Part 6: Code of practice for special applications BRITISH STANDA
2、RDBS 6262-6:2005BS 6262-6:2005This British Standard was published under the authority of the Standards Policy and Strategy Committee on 17 October 2005 BSI 17 October 2005First published as BS 973, 1941Second edition 1945Third edition, as CP 152, January 1960Fourth edition, August 1966Fifth edition,
3、 July 1972Sixth edition, as BS 6262, June 1982Seventh edition, October 2005The following BSI references relate to the work on this British Standard:Committee reference B/520/4ISBN 0 580 46771 6British Plastics FederationBritish Woodworking FederationConsumer Policy Committee of BSICouncil for Alumin
4、ium in BuildingFlat Glass Manufacturers AssociationGlass and Glazing FederationNottingham UniversityOffice of the Deputy Prime Minister Building DivisionOffice of the Deputy Prime Minister represented by the BRERICS Building Control ForumCo-opted membersAmendments issued since publicationAmd. No. Da
5、te CommentsCommittees responsible for this British StandardThe preparation of this British Standard was entrusted by Technical Committee B/520, Glass and glazing in building, to Subcommittee B/520/4, Properties and glazing methods, upon which the following bodies were represented:British Adhesives a
6、nd Sealants AssociationBS 6262-6:2005 BSI 17 October 2005ContentsPageCommittees responsible Inside front coverForeword ii1Scope 12 Normative references 13 Terms and definitions 14 Structural sealant glazing 25 Glazing using structural glass fins 56 Suspended glazing with annealed glass 87 Bolt fixed
7、 structural glazing 98 Mirrors 15Bibliography 20Annex A (informative) Simplified calculation of sealant dimensions for structural sealant glazing 18Figure 1 Definition of sealant bite in structural sealant glazing 2Figure 2 Principles of a structural sealant glazing system 4Figure 3 Fin thickness 6F
8、igure 4 Determination of annealed float glass fin width to resist the design wind load 7Figure 5 Fin support box 9Figure 6 Principles of a toughened glass infill panel bolted connection 10Figure 7 Typical localized fixing clamp for free standing glass barrier 12Figure 8 Typical continuous fixing cla
9、mp for free standing glass barrier 13Figure 9 Principles of a cantilever fin support 14Figure A.1 Structural sealant dimensions 18Table 1 Relationship between bolt size, spreader plates and glass thickness 11Table 2 Recommended frameless toughened door thicknesses 13Table 3 Spacing of bolts in canti
10、levered fin support systems 15iBS 6262-6:2005iisupersedes BS 6262:1982, which will be withdrawn upon publication of all seven parts of the newly revised and restructured BS 6262. BS 6262:1982 is being revised and restructured to simplify its use and will be published in seven parts:Part 1: General m
11、ethodology for the selection of glazing;Part 2: Energy, light and sound;Part 3: Fire, security and wind loading;Part 4: Safety related to human impact;Part 5: Frame design considerations;Part 6: Special applications;Part 7: Provision of informationSince the correct selection of materials to be used
12、in glazing for buildings depends on many factors, the recommendations in this part of this standard should be used in conjunction with the recommendations in the other parts.As a code of practice, this British Standard takes the form of guidance and recommendations. It should not be quoted as if it
13、were a specification, and particular care should be taken to ensure that claims of compliance are not misleading.This 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 does not of i
14、tself confer immunity from legal obligations.Summary of pagesThis document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 20, an inside back cover and a back cover.The BSI copyright notice displayed in this document indicates when the document was last issued.ForewordThis
15、 part of BS 6262 has been prepared by Subcommittee B/520/4. It partially BSI 17 October 2005BS 6262-6:20051 ScopeThis part of BS 6262 gives information and recommendations for vertical glazing in the external walls and interiors of buildings, with respect to:a) structural sealant glazing;b) bolt fix
16、ed structural glazing;c) frameless doors and entrances;d) mirrors.e) Bolt fixed structural glazing with countersunk holes is not specifically covered.NOTE Some guidance is also given on non-vertical use of mirrors.These recommendations do not apply to:1) patent glazing (see BS 5516-1);2) glass in no
17、n-vertical applications (see BS 5516-2);3) glazing for furniture and fittings (see BS 7376 and BS 7449);4) glazing for commercial greenhouses (see BS 5502-21);5) glazing for domestic greenhouses.Requirements for standards of workmanship for the application of sealants have been published separately
18、as BS 8000-16, and therefore this subject is not dealt with in this standard.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 refere
19、nced document (including any amendments) applies.BS 952-1, Glass for glazing Part 1: Classification.BS 6180, Barriers in and about buildings Code of practice.BS 6262-2, Glazing for buildings Part 2: Code of practice for energy, light and sound.BS 6262-3, Glazing for buildings Part 3: Code of practic
20、e for fire, security and wind loading.BS 6262-4, Glazing for buildings Part 4: Code of practice for safety related to human impact.3 Terms and definitionsFor the purposes of this British Standard, the following terms and definitions apply.3.1 glazing (noun)glass or plastics glazing sheet material, f
21、or installation into a building3.2 glazing (verb)action of installing glass, or plastics glazing sheet material, into a building3.3 insulating glass unitan assembly consisting of at least two panes of glass, separated by one or more spaces, hermetically sealed along the periphery, mechanically stabl
22、e and durableBS EN 1279-1:2004, definition 3.1NOTE The individual panes may be of different sizes and/or thicknesses. BSI 17 October 200513.4 panesingle piece of glass or plastics glazing sheet material, in a finished size ready for glazingBS 6262-6:20053.5 plastics glazing sheet materialplastics ma
23、terials in the form of a single sheet, or a combination of sheets laminated together, or an extruded multi-wall sheet3.6 sealant bitedepth of the structural sealant (and also the edge sealant in the case of insulating glass units), as shown in Figure 1, that contributes to the structural adhesion in
24、 structural sealant glazing3.7 vertical glazingglazing which is vertical, or within 15 of vertical3.8 four edge bonded structural sealant glazingstructural sealant glazing where the pane or insulating glass unit is held in place by the adhesive properties of the structural sealant along all four edg
25、es3.9 two edge bonded structural sealant glazingstructural sealant glazing where the pane or insulating glass unit is held in place by the adhesive properties of the structural sealant along two opposite edges and by conventional beaded framing systems on the other two edges1234Key1 Structural seala
26、nt2 Igu edge sealant3 Sealant bite4 Sealant biteFigure 1 Definition of sealant bite in structural sealant glazing4 Structural sealant glazing4.1 General2 BSI 17 October 2005This method of glazing uses the adhesive qualities of silicone sealants to retain the glass in the frame by adhesion, without t
27、he necessity of any mechanical retention such as beads, clips or bolt fixings. The system can be either two edge or four edge structural sealant glazing.BS 6262-6:2005A structural seal support frame is mounted onto the glass in a factory, complete with any appropriate setting blocks, location blocks
28、 and distance pieces. On site, the support frame is attached to the building structure by mechanical means and sealed.Figure 2 shows the principles of a structural glazing system.NOTE Structural glazing is not appropriate for fire resistant glazing.Further information on all aspects of structural se
29、alant glazing can be found in: prEN 13022, Glass in building Structural sealant glazing; and the EOTA publication, Guideline for European Technical Approval for structural sealant glazing systems.4.2 Design principles4.2.1 Glass selectionThe type of glass or insulating glass unit should be determine
30、d as if it were fully supported on all edges.It is recommended for four edge structural sealant glazing that the inner pane of an insulating glass unit is not manufactured from monolithic toughened glass, since, if this is accidentally fractured, there is a possibility that the rest of the unit will
31、 become detached from the adhesive.The glass selection should take into account the likely loading (e.g. see BS 6262-3, BS 6399-1, 2 and 3 and BS 6180) and safety requirements (e.g. see BS 6262-4), and be appropriate for environmental factors (such as thermal insulation, solar control and sound insu
32、lation, e.g. see BS 6262-2).4.2.2 Structural sealant selectionThe adhesive sealant is the only, or the principal means, of retaining the glazing in position, so the type of sealant is important. Only silicone sealants recommended by the manufacturer should be used.The sealant bite should be determin
33、ed from the design loads on the glass and the allowable stress of the sealant. Annex A describes the design method.With an insulating glass unit, both the edge sealant and the structural sealant serve a structural purpose in retaining the glass in position, and the sealant bite for both of these sho
34、uld be not less than the calculated figure.The glazing should be designed in such a way that the sealant is only subjected to short duration tensile forces, e.g. wind suction or live loads. Dead loads or sustained loads should be supported by other means, e.g. setting blocks to carry the glass weigh
35、t (see Figure 2).The design of the glazing should eliminate shear stresses on the structural sealant. BSI 17 October 20053BS 6262-6:200534651197181210Key1 Glass 7 Setting block2 Structural sealant 8 Weather seals3 Structural sealant support frame 9 Spacing material4 Spacer bar 10 Backer rod5 Buildin
36、g structure 11 Structural sealant6 Igu edge sealantFigure 2 Principles of a structural sealant glazing system4.2.3 BondingThe sealant will only perform its function if the adhesive bonds between the sealant and the surfaces of the glass and the sealant and the support frame are adequate and durable.
37、 Tests should be performed on the adhesion at all the interfaces with the proposed substrates to ensure that the joint is capable of developing the required strength and that this can be sustained for the expected life of the glazing, assuming regular inspection and maintenance.Adhesion is product a
38、nd surface specific. Once the adhesion tests have been completed satisfactorily, the specification for the glass, the support frame, the adhesive sealant and any primers should not be changed. If any changes are made, the full range of tests should be repeated.4.3 Compatibility of materialsThe insul
39、ating glass units should have the edge sealant manufactured from neutral curing silicone.Care should be taken to ensure that the structural sealant is compatible with the insulating glass unit edge sealant.4 BSI 17 October 2005Setting blocks, location blocks, weather seals and any other organic mate
40、rials used in the glazing system should be compatible with the structural sealant and the insulating glass unit edge sealant.BS 6262-6:2005Care should be taken to obtain compatibility between the various sealants and the interlayer of laminated glass.4.4 AssemblyAssembly of the glass and the support
41、 frame should be performed in controlled factory conditions, working to a prepared method statement. The adhesive qualities of the joint can be adversely affected by changes in temperature and humidity or the presence of moisture, so structural glazing adhesive joints should not be made on site.5 Gl
42、azing using structural glass fins5.1 GeneralThe recommendations of BS 6262-2, BS 6262-3 and BS 6262-4 should be followed in respect of the general selection and design of the glass. 5.2 and 5.3 supplement the recommendations given in those parts.5.2 DesignDisplay windows should be designed to resist
43、 the expected design wind load (see BS 6262-3), but as they may only be subjected to low wind loads, the psychological effects of possible deflections should also be assessed. In the absence of any other loading criteria, or if the wind load is lower than 600 N/m2, a minimum wind load of 600 N/m2sho
44、uld be applied.Where panes in the same plane are butt-jointed without fins, they are not as strong as a single pane of the same overall size and thickness. The butt joint cannot be regarded as a fully supported glass edge. The pane thickness should be calculated by assuming that they are two-edge or
45、 three-edge supported, i.e. supported by the surround only.Depending on the span and wind exposure, glass fins of minimum 15 mm thickness can be necessary, secured to the building structure and bonded to the glazing with a suitable sealant. The adhesive sealant should therefore have sufficient bond
46、strength to resist wind suction whilst allowing for movement. When these conditions apply, the faade panes can be considered to be fully supported on four edges.The stability and robustness of the rebates and their ability to withstand the effects of wind and glass weight are particularly important
47、in large openings.Where frames are cantilevered they should be designed to take the weight of the glass when installed. With very large panes it can be necessary to introduce rigid frame supports below the setting block positions to support the weight of the glass. The normal studding type of stall
48、riser framework might be inadequate for this purpose.Annealed glass fins should not be notched.5.3 Performance of glass with fin supportsThe thickness of the glass for the faade panes, taking account of wind loading, should be determined according to BS 6262-3, by considering the panes as fully supp
49、orted on all four edges. Figure 3 and Figure 4 determine the width and thickness of supporting fins, based on a design stress for the sealant of 0.275 N/mm2.The recommendations of the sealant manufacturer should be followed at all times. Figure 3 and Figure 4 are applicable to installations up to 5 m in height. Above 5 m, the glass supplier should be consulted to determine the suitability of proposals.To facilitate application of the sealant in a joint, a joint separator of, for example, s
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