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1、BRITISH STANDARD CP 143-1:1958 Incorporating amendment issued October 1961 (PD 4346) Code of practice Sheet roof and wall coverings Part 1: Aluminium corrugated and troughed UDC 69.024:691.77:669.71 417 Licensed Copy: London South Bank University, London South Bank University, Tue Dec 12 06:07:39 GM
2、T+00:00 2006, Uncontrolled Copy, (c) BSI CP 143-1:1958 This Code has been prepared by a Committee convened by the Codes of Practice Committee for Buildings. It was issued for general comment to the professional and trade organizations concerned with its subject matter. All comments and views express
3、ed have been taken into consideration in the final preparation of the code which, having been approved by the Codes of Practice Committee for Buildings, is now published by the British Standards Institution under the authority of the Council for Codes of Practice BSI 10-1999 The following BSI refere
4、nces relate to the work on this Code of Practice: Committee references BLCP/13 and BLCP/13/1 Draft for comment CX(BLCP) 8029 ISBN 0 580 35613 2 Drafting committee BLCP/13 Aluminium corrugated and troughed sheet roofing and siding Mr. C. W. Hutton Chairman Mr. R. M. DaviesAluminium Development Associ
5、ation Mr. H. G. Dunn Aluminium Industry Mr. D. F. Michell Mr. Charles S. GrayBritish Constructional Steelwork Association Dr. A. M. BurdonBritish Iron and Steel Federation The Director, Building Research Station D.S.I.R. Building Research Station Mr. A. J. Burling Federation of Associations of Speci
6、alists and Sub-contractorsMr. E. Hillson Mr. H. A. CadwellInstitution of Structural Engineers Mr. A. H. P. HudsonNational Federation of Building Trades Employers Mr. A. J. Burling National Federation of Roofing ContractorsMr. E. Hillson Mr. C. W. HuttonRoyal Institute of British Architects The Secre
7、taryR.I.B.A. Codes and Standards Committee Mr. D. G. RobertsonRoyal Institution of Chartered Surveyors Mr. W. Sidney LewisSheet Makers Conference Sub-committee BLCP/13/1 Aluminium corrugated sheet roofing Mr. C. W. Hutton Chairman Mr. R. M. DaviesAluminium Development Association Mr. H. G. Dunn Alum
8、inium Industry Mr. D. F. Michell The Director, Building Research Station D.S.I.R. Building Research Station Mr. A. J. BurlingNational Federation of Roofing Contractors Mr. C. W. HuttonRoyal Institute of British Architects The SecretaryR.I.B.A. Codes and Standards Committee Amendments issued since pu
9、blication Amd. No.Date of issueComments Licensed Copy: London South Bank University, London South Bank University, Tue Dec 12 06:07:39 GMT+00:00 2006, Uncontrolled Copy, (c) BSI CP 143-1:1958 BSI 10-1999i Contents Page Section 1. General 101Scope1 102Definitions1 Section 2. Materials and components
10、201Sheets and fittings1 202Fixing accessories1 203Jointing materials1 204Rainwater goods1 205Walkways2 Section 3. Design considerations 301Surface finishes2 302Weathering2 303Contact with other materials2 304Weathertightness3 305Thermal insulation3 306Condensation3 307Fire hazard3 308Expansion4 309P
11、urlin spacing and strength of sheeting4 310Methods of fixing the sheeting4 311Finishes at eaves, verges4 312Top edges and abutments4 313Pipes, etc., passing through roofing4 314Roof ventilators and roof lights5 315Gutters and rainwater pipes5 316Walkways and roof boards5 Section 4. Application 401St
12、orage5 402Safety precautions5 403Cutting and drilling6 404Laying the sheeting6 405Fixing the sheets6 406Fixing the components6 Section 5. Inspection and maintenance 501Inspection on completion7 502Walkways and notices7 Appendix Particulars of section properties9 Figure 1 Diagram of nipple-headed and
13、 spring-headed roofing nails11 Table 1 Maximum recommended loading for corrugated sheeting, BS 28557 Table 2 Maximum recommended loading for troughed sheet-Type A, BS 7 Table 3 Maximum recommended loading for troughed sheet-Type B. BS 8 Table 4 Corrugated aluminium sheet BS 28559 Table 5 Troughed al
14、uminium sheet BS , Type A9 Table 6 Troughed aluminium sheet BS , Type B10 This Code of Practice makes reference to the following British Standards and British Standard Codes of Practice: Licensed Copy: London South Bank University, London South Bank University, Tue Dec 12 06:07:39 GMT+00:00 2006, Un
15、controlled Copy, (c) BSI CP 143-1:1958 ii BSI 10-1999 BS 569, Asbestos cement and rainwater pipes, gutters and fittings. BS 1091, Pressed steel gutters, pipes, fittings and accessories. BS 1205, Cast iron rainwater goods. BS 1430, Aluminium rainwater goods (cast and extruded). BS 1431, Wrought coppe
16、r and wrought zinc rainwater goods. BS 1470 BS 1477, Wrought aluminium and aluminium alloys. BS 1490, Aluminium and aluminium alloy ingots and castings. BS 1494, Fixing accessories for building purposes. BS 1543, Wrought aluminium rainwater goods. BS 2465, Aluminium fixing accessories for building p
17、urposes. BS 2717, Glossary of terms applicable to roof coverings. BS 2855, Corrugated aluminium sheets for general purposes. BS , Troughed aluminium building sheets1). CP 3, Code of functional requirements of buildings. CP 3:Chapter V, Loading. CP 231, Painting. CP , Roof and yard drainage1). A Brit
18、ish 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 British Standard does not of itself confer immunity from legal obligations. Attention is, however, drawn to the fact that i
19、n certain bye-laws, notably those Building Bye-laws based upon one of the models issued by the Ministry of Housing and Local Government and the Department of Health for Scotland, compliance with the provisions of certain British Standards or British Standard Codes of Practice, or of specific clauses
20、 therein, is “deemed to satisfy” the requirements of certain of the bye-laws in the fields covered by the British Standards and Codes of Practice, or by the specific clauses referred to. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 11 and
21、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 the inside front cover. 1) In course of preparation Licensed Copy: London South Bank University, London South Bank University, Tue Dec 12 06:07
22、:39 GMT+00:00 2006, Uncontrolled Copy, (c) BSI CP 143-1:1958 BSI 10-19991 Section 1. General 101 Scope This Code deals with aluminium alloy corrugated and troughed sheeting conforming to BS 2855 and BS 2) used as covering for roofs and sides of buildings. It contains information on weathering, conta
23、ct with other materials, fire hazard and other characteristics, and makes recommendations relating to materials, design and construction. 102 Definitions Many of the terms used throughout this Code are defined in BS 2717. For the purpose of this Code the following additional definitions apply: Secti
24、on 2. Materials and components 201 Sheets and fittings Sheets should be of alloy NS3-H complying with the requirements of BS 1470, “Wrought aluminium and aluminium alloys, sheet and strip”. The sheets should be of corrugated or troughed section and should comply with the following British Standards:
25、 BS 2855, Corrugated aluminium sheets for general purposes. BS , Troughed aluminium building sheets2). Sheets wider and larger than the preferred sizes to the same specification are available and may be used. Aluminium flashings and components made from sheet, such as ridge cappings, barge boards, v
26、alley gutters and ventilators should be of one of the following materials complying with the requirements of BS 1470, in temper appropriate to the duty and forming, operations required: NS3, NS4, S1C, S1B, S1A and S1. Alternatively, by agreement between the contracting parties, lead or other suitabl
27、e material may be used but reference should be made to Clause 303. 202 Fixing accessories Hook bolts, drive screws; seam bolts, nuts and washers should comply with the requirements of BS 2465, “Aluminium fixing accessories for building purposes”. Alternatively, they may be of galvanized steel comply
28、ing with the requirements of BS 1494, “Fixing accessories for building purposes,” or they may be of stainless steel. Nails suitable for fixing to timber are illustrated in Figure 1. Any other fixings required, such as blind or break-stem rivets, should be of materials complying with BS 1473, excludi
29、ng HR14, and care should be taken in their design and use to ensure that they do not impair the efficiency of the roof or wall sheeting. 203 Jointing materials Zinc or barium chromate jointing compounds are preferable, although bituminous mastics and certain non-bituminous-based materials may be use
30、d. 204 Rainwater goods Subject to the recommendations of Clause 303 rainwater goods should conform to the requirements of the following British Standards, as relevant: a) Aluminium. BS 1430, “Aluminium rainwater goods (cast and extruded)” or BS 1543, “Wrought aluminium rainwater goods”. b) Asbestos-
31、cement. BS 569, “Asbestos-cement spigot and socket rainwater pipes, gutters and fittings”. c) Cast iron. BS 1205, “Cast iron rainwater goods”. d) Zinc. BS 1431, “Wrought copper and wrought zinc rainwater goods”. Zinc only is recommended, see Clause 303. e) Pressed steel. BS 1091, “Pressed steel, gut
32、ters, pipes, fittings and accessories”. 2) BS , Troughed aluminium building sheets (in course of preparation). AluminiumAluminium or aluminium alloys to BS 1470 BS 1477, and BS 1490. Hook or cranked bolt Bolts, hooked or cranked at one end and threaded at the other end for attaching corrugated sheet
33、s to purlins or rails. LapEnd. The distance one sheet overlaps the next sheet in the course below. Side. The distance one sheet overlaps the adjoining sheet in the same course. Seam boltA mushroom-headed bolt used for fastening together adjacent sheets at side or end laps. The securing of end laps b
34、y means of seam bolts is described as tail bolting. Licensed Copy: London South Bank University, London South Bank University, Tue Dec 12 06:07:39 GMT+00:00 2006, Uncontrolled Copy, (c) BSI CP 143-1:1958 2 BSI 10-1999 205 Walkways Permanent walkways should be of aluminium, steel or timber or a combi
35、nation of these materials. Aluminium framing should be to specification. H30. If softwood is treated with a preservative, care should be taken to avoid this preservative having harmful effects on aluminium see Clause 303 e). Section 3. Design considerations NOTEConversion to metric sizes. Correspond
36、ing metric dimensions can be obtained by using the conversion factor 1 inch = 25.4 millimetres (exactly) 301 Surface finishes When the natural bright appearance of aluminium is not acceptable, acid or alkaline chromate-type treatments may be applied to provide a special matt finish. Although not of
37、general application, special finishing processes, such as anodizing in accordance with BS 1615, may be used. 302 Weathering The effect of atmospheric exposure on aluminium sheets is to produce surface oxidation. In rural districts this will appear as a light grey film, but in industrial-areas it wil
38、l be darker in colour, will form more rapidly and will be of greater thickness. A white matt surface oxide coating appears after a short time on exposure in coastal areas. The surface film acts as a protective layer and the rate of corrosion of the metal decreases rapidly after the initial stages, s
39、o that painting is normally unnecessary. In polluted atmospheres where there is doubt as to the suitability of the sheets for the application the advice of the manufacturer should be sought. 303 Contact with other materials a) Electrolytic action. Corrosion resulting from electrolytic action between
40、 aluminium and another metal depends on the presence of moisture; for this reason bi-metallic contacts are best located in dry positions not subject to condensation. In damp, sheltered locations deposits from a polluted atmosphere can accelerate the action; in such locations bi-metallic contacts sho
41、uld be avoided. Electrolytic action is only significant when the metal in contact with the aluminium has an appreciably different electro-chemical potential, e.g. copper or brass. These metals should not be in direct contact with aluminium. Contact between aluminium and zinc is permissible. Contact
42、with steel, while not necessarily harmful, should preferably be avoided and the precautions, detailed in Clause 303 b), should be taken when roof sheets or accessories are fixed on steel purlins or rails. b) Contact with steelwork. The steelwork should be painted with two coats of zinc chromate or b
43、arium chromate-based primer, extended if desired with red oxide of iron. Alternatively, the steelwork may be painted with not less than two coats of bituminous paint or the steel may be spray coated with zinc or aluminium, or painted with two coats of zinc-rich paint (see CP 231, “Painting”). Finish
44、 painting to the contact faces of purlins and rails should be completed before sheeting is applied. In polluted or marine atmospheres it is advisable to take additional precautions, such as the use of non-rotting chromate insulating tapes applied to the painted surface before the sheets are fixed. I
45、n exceptional conditions the use of non-conducting gasket material is recommended, with non-conducting sleeves and washers to insulate the aluminium from contact with bolts and fastenings of dissimilar metal. c) Contact with other metals. While contact between aluminium sheets and galvanized fasteni
46、ngs is normally satisfactory the use of aluminium roof fastenings is preferable. Lead washers or flashings in contact with aluminium are not recommended in marine or severe industrial conditions. d) Run off from other materials. Water running off copper or copper base alloys on to aluminium will cau
47、se corrosion of the aluminium. e) Contact with building materials. Contact with materials such as wood, cement, concrete, mortar or plaster should be avoided by coating one of the surfaces in contact with two coats of bituminous or other suitable paint. Where aluminium is laid in contact with an abs
48、orbent material it is advisable to isolate the sheeting with a layer of building paper or roofing felt. Where it is necessary to treat timber purlins or rails with preservatives containing inorganic copper compounds they should be of a type which does not leach out of the wood because damage to the
49、aluminium may result. Alternatively, contacts of treated timber and sheeting should be avoided by painting or by inserting a separating layer of felt as described above. Licensed Copy: London South Bank University, London South Bank University, Tue Dec 12 06:07:39 GMT+00:00 2006, Uncontrolled Copy, (c) BSI CP 143-1:1958 BSI 10-19993 f) Contact with painted surfaces. Paints containing copper and mercury should not be used in contact with aluminium. It is preferable also to avoid contact with paints containing lead, gra