《BS-8103-2-1996.pdf》由会员分享，可在线阅读，更多相关《BS-8103-2-1996.pdf（32页珍藏版）》请在三一文库上搜索。
1、BRITISH STANDARD BS 8103-2: 1996 Structural design of low-rise buildings Part 2: Code of practice for masonry walls for housing Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 05:41:50 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 8103-2:1996 This British Standa
2、rd, having been prepared under the direction of the Sector Board for Building and Civil Engineering, was published under the authority of the Standards Board and comes into effect on 15 January 1996 BSI 12-1998 The following BSI references relate to the work on this standard: Committee reference B/5
3、25 Draft for comment 90/11766 DC ISBN 0 580 23232 8 Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee B/525, Building and civil engineering structures, upon which the following bodies were represented: Association of Consul
4、ting Engineers British Cement Association British Constructional Steelwork Association Ltd. British Masonry Society Building Employers Confederation Department of the Environment (Building Research Establishment) Department of the Environment (Construction Directorate) Department of Transport Federa
5、tion of Civil Engineering Contractors Institution of Civil Engineers Institution of Structural Engineers National Council of Building Material Producers Royal Institute of British Architects Timber Research and Development Association The following bodies were also represented in the drafting of the
6、 standard, through subcommittees and panels: Association of Building Engineers Autoclaved Aerated Concrete Products Association Brick Development Association British Ceramic Research Ltd. British Precast Concrete Federation Ltd. Calcium Silicate Brick Association Limited Concrete Block Association D
7、epartment of the Environment for Northern Ireland Institute of Building Control National House-building Council Scottish Office Amendments issued since publication Amd. No.DateComments Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 05:41:50 GMT+00:00 2006, Unco
8、ntrolled Copy, (c) BSI BS 8103-2:1996 BSI 12-1998i Contents Page Committees responsibleInside front cover Forewordii 1Scope1 2References1 3Definitions1 4Field of application3 5Materials and components7 6Conditions relating to the wall7 7Horizontal lateral support by roof and floors19 8Masonry chimne
9、ys19 9Parapet walls19 Annex A (normative) External walls of small single storey non-residential buildings and annexes21 Annex B (informative) Design provisions for movement in masonry25 Figure 1 Field of application2 Figure 2 Walls with a difference in ground level on opposite sides4 Figure 3 Map of
10、 United Kingdom showing basic wind speed (in m/s)5 Figure 4 Maximum height of building7 Figure 5 Measuring wall heights8 Figure 6 Maximum plan areas9 Figure 7 Building size and shape9 Figure 8 Minimum wall thickness for external and separating walls10 Figure 9 Minimum wall thickness for external and
11、 separating walls with storey heights A and d11 Figure 10 Compressive strength of masonry units for buildings12 Figure 11 Lintel spanning in the plane of the wall14 Figure 12 Lintel spanning at right angles to the wall14 Figure 13 Spacing of wall ties16 Figure 14 Internal buttressing walls17 Figure
12、15 Piers and chimneys providing restraint17 Figure 16 Size and position of openings and recesses18 Figure 17 Sizes of chases19 Figure 18 Sizes of chimneys20 Figure 19 Sizes of parapet walls20 Figure A.1 Size and shape of buildings or annexes22 Figure A.2 Location of openings23 Figure A.3 Wall thickn
13、esses24 Figure A.4 Horizontal lateral restraint at roof level25 Figure B.1 Movement joint at change in external wall height26 Figure B.2 Offsets26 Figure B.3 Movement joints in terraced housing26 Table 1 Maximum heights of buildings on normal level sites within the scope of this code6 Table 2 Maximu
14、m heights of buildings on steeply sloping sites within the scope of this code7 Table 3 British Standards for materials and components listed10 Table 4 Minimum bearing length for lintels14 Table 5 Selection of types and lengths of wall ties15 Table 6 Value of X18 List of referencesInside back cover L
15、icensed Copy: London South Bank University, London South Bank University, Fri Dec 08 05:41:50 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 8103-2:1996 ii BSI 12-1998 Foreword This Part of BS 8103 has been prepared under the direction of the Technical Committee B/525, Building and civil engineering
16、structures. A large proportion of the national building programme is concerned with new housing and alterations in both the public and private sectors where traditional methods of construction are used for the majority of houses, and it is to these that this code is applicable. BS 8103 is published
17、in four Parts: Part 1: Code of practice for stability, site investigation, foundations and ground floor slabs for housing; Part 2: Code of practice for masonry walls for housing; Part 3: Code of practice for timber floors and roofs for housing; Part 4: Code of practice for concrete suspended floors
18、for housing. This code is written for those with expertise in building construction but not necessarily in structural engineering design. Low-rise buildings constructed within the limitations stated in the relevant clauses will not require additional specialist advice. For any conditions outside the
19、 limitations of this code, appropriate specialist advice should be obtained. It should not be expected that the recommendations made in this Part can be proved by calculation as they are based on traditional prescriptive guidance substantiated by long experience. In formulating the guidance of this
20、code, the worst combination of circumstances likely to arise was taken into account. It may be appropriate to consider a minor departure from the recommendations of this Part and show adequacy by calculation. However, in cases where the recommendations of clause 6 for conditions relating to a wall a
21、re not able to be met or are inappropriate then reference should be made to BS 5628-1. When using this code it is important to assess that the overall stability of the building is achieved, and that the work of any specialist engaged is properly co-ordinated. BS 8103-1 covers the stability aspect of
22、 low-rise housing. The recommendations in this code are intended to provide safe designs without the need for calculations of loading and strength criteria. The figures in this code support the text. They do not show all constructional details and are not intended to illustrate compliance with any o
23、ther requirements or recommendations. They are not necessarily to scale and should not be used as working details. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a Br
24、itish 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 and ii, pages 1 to 26, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendmen
25、ts incorporated. This will be indicated in the amendment table on the inside front cover. Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 05:41:50 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 8103-2:1996 BSI 12-19981 1 Scope This Part of BS 8103 gives recommend
26、ations for walls above ground level damp-proof course (dpc) and walls between ground floor level and top of foundation level in the following range of buildings of traditional construction: a) low-rise housing comprising detached, semi-detached and terraced houses and flats (with not more than four
27、self-contained dwelling units per floor accessible from one staircase) of not more than three storeys above ground, intended for domestic occupation; b) certain small single storey non-residential buildings, e.g. domestic garages and annexes to residential buildings not exceeding 36 m2 in floor area
28、 (see annex A). For such buildings all clauses of the code are applicable except for 4.2, item a) of 4.3, 6.1, 6.7.3 and 6.8. For the purposes of this code, additional habitable accommodation in the roof space constitutes a storey of the house. This code does not include the design of basements, but
29、 providing the basement is of one level only and is designed to provide a firm platform at ground level the provisions of this code may apply to the superstructure. The structural design recommendations described in this code are not intended to cover other considerations such as fire resistance, th
30、ermal and sound insulation, resistance to damp penetration and durability for which reference should be made, for example to BS 5628-3. Proprietary housing systems and houses of timber, steel or concrete framed constructions are not covered by this code. NOTEAnnex B gives guidance on design provisio
31、ns for movement. 2 References 2.1 Normative references This Part of BS 8103 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 the inside back cover. For d
32、ated references, only the edition cited applies; any subsequent amendments to or revisions of the cited publication apply to this Part of BS 8103 only when incorporated in the reference by amendment or revision. For undated references, the latest edition of the cited publication applies, together wi
33、th any amendments. 2.2 Informative references This Part of BS 8103 refers to other 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.
34、 3 Definitions For the purposes of this British Standard the definitions in BS 6100 apply in general, together with the following. 3.1 annexe single storey adjunct to a residential building with dimensions of the adjunct not exceeding those given in annex A NOTEExamples are a porch, verandah, loggia
35、, conservatory, greenhouse, garage, tool shed, fuel store, water closet, lavatory, wash-house. 3.2 traditional construction buildings constructed as follows: a) roofs: 1) timber rafter and purlin; 2) timber truss and purlin; 3) timber trussed rafter; 4) timber flat roof. b) ground floors: 1) timber
36、suspended; 2) concrete ground-supported; 3) concrete precast suspended; 4) concrete in situ reinforced suspended. c) intermediate floors: 1) timber suspended; 2) concrete precast suspended. d) walls of masonry construction. where loads do not exceed those given in other Parts of BS 8103 3.3 thicknes
37、s (of walls) space allocated to masonry units taking into account their allowed dimensional deviations. In the case of non-loadbearing walls, this includes the thickness of any applied finish to the wall Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 05:41:50 G
38、MT+00:00 2006, Uncontrolled Copy, (c) BSI BS 8103-2:1996 2 BSI 12-1998 Figure 1 Field of application Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 05:41:50 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 8103-2:1996 BSI 12-19983 4 Field of application NOTEWhen c
39、hecking whether this code applies to a particular building, reference should be made to Figure 1. 4.1 Limiting loads and dimensions 4.1.1 Vertical dead loads The recommendations given in this code are based on the assumption that all floors and roofs supported by the walls conform to BS 8103-3 for t
40、imber elements and BS 8103-4 for concrete floors. 4.1.2 Vertical imposed loads The recommendations given in this code are based on the assumption that the imposed loads on the floors supported by the walls, given in type 1 of Table 51) in BS 6399-1:1984 will not be exceeded. 4.1.3 Lateral imposed lo
41、ads 4.1.3.1 Ground levels either side of walls Where a wall is subjected to a lateral load from retained material due to a difference in ground levels on opposite sides, the difference in level above fully compacted backfill should not exceed the dimensions shown in Figure 2. The rules given in Figu
42、re 2 b) do not apply where there is an adjacent roadway on the upper level, used other than by private cars, and where the roadway for such vehicles is closer than a distance equivalent to 1.25 times the retained height. Such situations are outside the scope of this code. NOTEFigure 2 does not apply
43、 to free-standing walls. 4.1.3.2 Wind loading The maximum wind forces to which a building is liable to be exposed will vary with its geographical location in the country, the degree of exposure, and the height of the building. The scope of this code is based on a limited building shape (see 4.3), bu
44、ilding height (see 4.2), and storey height (see 4.2). It will normally be possible to establish the applicability of this code by reference to the basic wind speeds shown in Figure 3 and listed in Table 1 and Table 2. If the proposed building falls outside the maximum building height in these tables
45、 or where doubt exists, a separate design check in accordance with CP 3:Chapter V-2 should be carried out. If the design wind speed exceeds 44 m/s this code does not apply and the design should be carried out in accordance with BS 5628-1. 4.2 Dimensions The recommendations given in this code are gov
46、erned by the following limiting dimensions. a) The maximum length of loadbearing wall between vertical lateral supports, i.e. between centre-lines of buttressing walls, piers, return walls etc., should be 9 m (see 6.7). b) No part of a wall or roof should be higher than 15 m above the lowest adjacen
47、t ground level (see Figure 4). c) The maximum external wall height (H1, H2, or H3, measured in accordance with Figure 5) should be 12 m. d) The maximum clear span of any roof should be 12 m. e) The maximum clear span of any floor should be 6 m. f) No opening in a loadbearing wall should have a clear
48、 span greater than 3.0 m. g) The maximum floor area for stability should be as shown in Figure 6. h) The maximum height from top of foundation to top of ground floor (see Figure 5) should be: 1) 2.7 m where the floor provides lateral restraint to the wall; and 2) 1 m for all other cases. i) For maxi
49、mum storey height see Figure 5. 1) Residential occupancy class, self-contained dwelling units. Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 05:41:50 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 8103-2:1996 4 BSI 12-1998 Figure 2 Walls with a difference in ground level on opposite sides Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 05:41:50 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 8103-2:1996 BSI 12-19985 Figure 3