1、BRITISH STANDARD BS 8212:1995 Code of practice for Dry lining and partitioning using gypsum plasterboard UDC 629.253:691.311-419:62.034.92:006.76:(083.71)BS 8212:1995 This British Standard, having been prepared under the directionof Technical CommitteeB/544, was publishedunder the authority ofthe St
2、andards Board and comesinto effect on 15 January 1995 BSI 02-1999 First published January 1989 Second edition January 1995 The following BSI references relate to the work on this standard: Committee reference B/544/3 Draft for comment 93/105870 DC ISBN 0 580 22879 7 Committees responsible for this B
3、ritish Standard The preparation of this British Standard was entrusted by the Technical Committee B/544, Plastering, rendering, dry lining, screeds and in situ flooring, to Subcommittee B/544/3, Dry lining, upon which the following bodies were represented: Association of Building Component Manufactu
4、rers Building Employers Confederation Department of the Environment (Building Research Establishment) Federation of Plastering and Drywall Contractors Gypsum Products Development Association Local Authority Organizations National Council of Building Material Producers Amendments issued since publica
5、tion Amd. No. Date CommentsBS 8212:1995 BSI 02-1999 i Contents Page Committees responsible Inside front cover Foreword iii Section 1. General 1.1 Scope 1 1.2 References 1 1.3 Definitions 1 1.4 Exchange of information 2 1.5 Time schedule 2 Section 2. Materials, components and accessories 2.1 Material
6、s 4 2.2 Components and accessories 4 Section 3. Design 3.1 Selection of a dry lining system 7 3.2 Thickness of dry lining system 7 3.3 Deviations and tolerances 8 3.4 Partitions 13 3.5 Provision for services 14 3.6 Ceramic wall tiling 14 3.7 Decoration 15 3.8 Mass/unit area of wall lining and partit
7、ioning systems 15 3.9 Knocks and abrasions 15 3.10 Environmental conditions 15 3.11 Sealing 15 3.12 Thermal insulation 17 3.13 Water vapour checks 18 3.14 Sound insulation 18 3.15 Fire protection 18 3.16 Cavity barriers 18 3.17 Movement joints 18 Section 4. Backgrounds 4.1 Condition of background 19
8、 4.2 Solid backgrounds 19 4.3 Timber backgrounds 19 4.4 Metal backgrounds 22 Section 5. Site considerations 5.1 General 23 5.2 Environmental conditions 23 5.3 Organization prior to the commencement of dry lining and partitioning works 23 5.4 Storage of materials 23 5.5 Lighting 24 5.6 Scaffolding 24
9、 5.7 Hoisting 24 5.8 Protection of the work 24 Section 6. Work on site 6.1 Cutting and installation of gypsum wallboard 25 6.2 Fixing to solid backgrounds 25 6.3 Installation and fixing to timber framing 31BS 8212:1995 BSI 02-1999 Page 6.4 Installation of and fixing to metal framing 33 6.5 Jointing
10、38 6.6 Partitions 40 6.7 Decoration 43 Annex A (informative) Thickness tolerance for zinc coating type Z275 44 Annex B (informative) Lighting for dry lining 44 Figure 1 Deviation band for finished surface of a partition or lining 9 Figure 2 Straightness of walls in any 5m length 10 Figure 3 Permissi
11、ble deviations on jointing 11 Figure 4 Straightedge for measuring deviations at external and internalangles 12 Figure 5 Joints over timber supports in walls and partitions 20 Figure 6 Joints over timber supports in ceilings: fastenings near cut endsofboards 21 Figure 7 Setting out board: external an
12、gles and abutments 26 Figure 8 Setting out board: intermediate joints on studs 27 Figure 9 Wall to ceiling junction 28 Figure 10 Suggested adhesive dab fixing pattern for gypsum wallboardandthermal wallboard laminates 29 Figure 11 Channel spacer clip 30 Figure 12 Fixing thermal wallboard laminates w
13、ith resin based adhesive 31 Figure 13 Typical examples of beam and column encasement 33 Figure 14 Typical steel stud partitions 34 Figure 15 Movement joints 37 Figure 16 Angle jointing 39 Figure 17 Prefabricated gypsum wallboard panel 41 Figure 18 Laminated partition 42 Table 1 Design allowance for
14、thickness of linings to solid backgrounds 7 Table 2 Typical independent wall linings 8 Table 3 Dry lining to receive ceramic wall tiling 16 Table 4 Typical mass/unit area of gypsum wallboard wall lining and partitioning systems 17 Table 5 Spacing of timber supports in walls and partitions 20 Table 6
15、 Spacing of timber supports in ceilings 21 Table 7 Spacing of metal supports in walls and partitions 22 Table 8 Spacing of metal supports in ceilings 22 Table 9 Fixing of wallboard and thermal wallboard laminate with gypsumbased adhesives 29 Table 10 Dimensions of timbers 40 Table 11 Dimensions of b
16、attens and fastenings 43 Table A.1 Thickness tolerance for zinc coating type Z275 (including coatingonboth sides) 44 List of references 46BS 8212:1995 BSI 02-1999 iii Foreword This British Standard was prepared under the direction of Technical CommitteeB/544. It supersedes BS8212:1989which is withdr
17、awn. Dry lining is an alternative to the traditional wet plastering of walls and ceilings to provide surfaces suitable to receive various decorative treatments. The method involves the fixing of a sheet material, which is subsequently jointed in the appropriate manner, to the face of the walls or ce
18、ilings. This code confines itself to recommendations for dry lining using gypsum wallboard; it is not intended to apply to other sheet materials. This code provides guidance on the selection of a dry lining system and lists factors that should be taken into consideration in the selection process. It
19、 gives recommendations for methods of dry lining to a variety of solid backgrounds and to timber and metal framing. Recommendations for on site methods of working are also included together with detailed descriptions of the materials, components and accessories used in the dry lining process. Annex
20、A gives thickness tolerances for metal used for metal framing. Annex B give recommendations for lighting conditions appropriate to dry lining operations. This edition introduces technical changes but it does not reflect a full review or revision of the standard, which will be undertaken in due cours
21、e. As a code of practice, this British Standard takes the form of guidance and recommendations. It should not be quoted as if it were a specification and particular care should be taken to ensure that claims of compliance are not misleading. A British Standard does not purport to include all the nec
22、essary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i to iv, pages
23、1to46, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on theinside front cover.iv blankBS 8212:1995 BSI 02-1999 1 Section 1. General 1.1 Scope This British Standard cod
24、e of practice gives recommendations for dry lining walls, ceilings and partitioning using gypsum wallboard. Composite products such as gypsum plasterboard backed with insulation materials are also included. This code does not deal with linings to heated ceilings. 1.2 References 1.2.1 Normative refer
25、ences This standard incorporates, by dated or undated reference, provisions from other publications. These normative references are made at the appropriate places in the text and the cited publications are listed on page46. For dated references, only the edition cited applies; any subsequent amendme
26、nts to or revisions of the cited publication apply to this standard only when incorporated in the reference by amendment or revision. For undated references, the latest edition of the cited publication applies, together with any amendments. 1.2.2 Informative references This standard refers to other
27、publications that provide information or guidance. Editions of these publications current at the time of issue of this standard are listed on the inside back cover, but reference should be made to the latest editions. 1.3 Definitions For the purposes of this code the definitions given in BS1191-1and
28、BS1191-2, BS1230-1, BS4022, BS6100-1, BS6100-6.1and BS6100-6.6.2apply, together with the following. 1.3.1 face surface of gypsum plasterboard on which the paper extends continuously to cover the edges 1.3.2 back surface of gypsum plasterboard having a double thickness of paper along the two edges 1.
29、3.3 insulating gypsum wallboard gypsum wallboard backed with a film having a surface of low emissivity, e.g.aluminium, to improve thermal insulation when used in conjunction with an air space 1.3.4 thermal wallboard laminate gypsum wallboard backed with an insulating material such as expanded polyst
30、yrene, polyurethane, phenolformaldehyde foam or man-made mineral fibre materials 1.3.5 predecorated gypsum wallboard gypsum wallboard faced with either paper or cloth backed vinyl film 1.3.6 prefabricated gypsum wallboard panel partitions prefabricated gypsum wallboard panels, manufactured in accord
31、ance with the requirements of BS4022and nailed to timber framing members 1.3.7 laminated gypsum plasterboard partitions three or more layers of gypsum wallboard bonded together and fixed at the perimeter to a steel or timber frame 1.3.8 relocatable partitions partitions that permit reassembly after
32、removal and relocation 1.3.9 metal furring channel galvanized steel section for the attachment of wallboard linings to solid backgrounds 1.3.10 resilient fixing channel galvanized steel section for securing gypsum wallboard to the supporting background by a resilient mounting 1.3.11 nailable fixing
33、plug galvanized steel nail with an expandable plastics sleeve 1.3.12 general purpose bonding compound adhesive made from retarded calcium sulfate hemihydrate and additives 1.3.13 thermal wallboard laminate adhesive adhesive made from synthetic resin emulsion with fillers used for bonding thermal wal
34、lboard laminates to plastered wallsBS 8212:1995 2 BSI 02-1999 1.3.14 resilient wallboard adhesive adhesive made from synthetic rubber/resin used to bond plasterboard to plasterboard 1.3.15 decorative textured coating plastics based textured coating used as a decorative finish 1.4 Exchange of informa
35、tion When preparing dry lining details the designer should take into account the following points. a) The choice of dry lining systems to be used in various parts of the building depends on functional requirements and the nature of the background. The background, including building and manufacturing
36、 tolerances, and its dry lining should therefore receive consideration together. This is particularly important where plasterboard is to be fixed to trussed rafters. A thickness of rafter conforming to BS5268-3and perfectly adequate from a structural point of view may be unsuitable to permit adequat
37、e fixing of the end of the plasterboard in accordance with the recommendations given in4.3.3. b) The type of surface finish and any other points affecting the final appearance, particularly the compatibility of the dry lining with the proposed decorative finish. c) The area and types of finish and t
38、hickness required together with sufficient details of the nature of the surfaces to be dry lined and the junctions with window frames, door frames, ceilings and linings, so that the most suitable dry lining materials and methods can be selected. d) The effect of the thickness of the dry lining on: 1
39、) the finished sizes and heights of rooms or other spaces; 2) the thickness of grounds; timber framing requirements; 3) flames which are to be flush both sides in thin walls and partitions; 4) the positioning of frames and other joinery relative to dry lining faces; 5) grooves in joinery that are to
40、 receive dry lining; 6) the positioning of and provision of adequate support for heating appliances and other installations, fixtures and fittings; 7) any other items, the specification for which can be drawn up in detail only after the dry lining thicknesses have been determined. e) The preparation
41、 of the different building surfaces to receive the various types of cornices, arrises, corner treatments, metal accessories (such as angles and beads), expansion joints, coves, mouldings, dado treatments and enrichments. f) The work in other trades, particularly in connection with service pipes, con
42、duits and wiring, that are to be covered by or contained in the dry lining; the predetermined position of any heating appliances and their dry lining treatment. Care should be taken not to destroy the structural integrity of the dry lining or partitioning. g) The suitability of materials that may be
43、 in contact with different types of dry lining, as well as of any protective treatment that may be necessary. Exchange of pertinent information should take place as soon as possible after contract among those responsible for the execution of backgrounds, the dry lining, internal plastering and subse
44、quent decoration and with other trades whose work will affect or be affected by the dry lining. The dry lining contractor should be furnished with all necessary specifications and appropriate working drawings and should visit the site to become acquainted with building progress. A record should be k
45、ept of all dates in connection with construction and preparation of backgrounds and of the different operations of dry lining and decoration in the various parts of the building. There should be a full exchange of information regarding site conditions. 1.5 Time schedule When preparing a time schedul
46、e for the building operations it should be ensured that the various trades follow one another in correct sequence and that they do not interfere unduly with each others work. The time schedule for the whole of the building work should be planned in the initial stages before operations are begun and
47、in consultation with those who will be responsible for carrying out the work of each of the trades concerned. The time schedule should allot times for the construction and preparation of the backgrounds to receive dry lining and allow sufficient intervals for drying out, either by natural or artific
48、ial means, after the structure has been made weatherproof, so that the dry lining work may proceed without subsequent damage to it or its decoration.BS 8212:1995 BSI 02-1999 3 The time schedule should provide for the completion of the works of preceding trades prior to commencement on site of the dr
49、y lining contractor. Sufficient areas of work should be made available in sequence so that the dry lining or partitioning work can start and continue as part of the programme. All concerned should be aware that, after having agreed a programme, it is not always possible to increase or decrease labour on site at short notice, just as and when work is available. It is essential that the areas to be dry lined or partitioned are watertight, weatherproof and dry. This is of particular importance as dry lining materials are
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