1、BRITISH STANDARD BS7364:1990 Specification for Galvanized steel studs and channels for stud and sheet partitions and linings using screw fixed gypsum wallboardsBS7364:1990 This British Standard, having been prepared under the directionof the Elements and Components (of Diverse Materials)for Building
2、s Standards Policy Committee, waspublished under the authorityof the Board of BSI andcomes into effect on 30September1990 BSI09-1999 The following BSI references relate to the work on this standard: Committee reference ECB/27 Draft for comment89/12924 DC ISBN 0 580 18973 2 Committees responsible for
3、 this British Standard The preparation of this British Standard was entrusted by the Elements and Components (of Diverse Materials) for Buildings Standards Policy Committee (ECB/-) to Technical Committee ECB/27, upon which the following bodies were represented: Aluminium Federation Association of Bu
4、ilding Component Manufacturers Ltd. Autoclaved Aerated Concrete Products Association British Board of Agrment British Concrete Masonry Association British Precast Concrete Federation Ltd. Cold Rolled Sections Association Department of Health Department of the Environment (Building Research Establish
5、ment) Department of the Environment (Property Services Agency) Flat Glass Manufacturers Association Glass and Glazing Federation Gypsum Products Development Association Institution of Structural Engineers Loss Prevention Council National Federation of Plastering, Dry Lining and Partition Contractors
6、 Partitioning Industry Association Royal Institute of British Architects Timber Research and Development Association Wood Wool Slab Manufacturers Association Amendments issued since publication Amd. No. Date CommentsBS7364:1990 BSI 09-1999 i Contents Page Committees responsible Inside front cover Fo
7、reword ii 1 Scope 1 2 Definitions 1 3 Materials 1 4 Manufacture 3 5 Measurement and tolerances 3 6 Marking 3 7 Product information 3 Appendix A Reproduction of Table10 from BS2989:1982 4 Figure 1 Typical stud and channel profiles, boxed stud and spliced stud 2 Table 1 Thickness tolerance for coating
8、 type G275 (including coating on both sides) as taken from Table10 of BS2989:1982 4 Publication(s) referred to Inside back coverBS7364:1990 ii BSI 09-1999 Foreword This British Standard has been prepared under the direction of the Elements and Components (of Diverse Materials) for Buildings Standard
9、s Policy Committee. Metal stud framing, being an integral part of a partition, contributes to the partitions overall performance and to test or assess in isolation, the strength and other properties of studs and channels would be meaningless. It is envisaged that the strength and robustness of a com
10、plete partition will be assessed by test methods to be given in the revision of BS5234 which is in preparation. Product certification. Users of this British Standard are advised to consider the desirability of third party certification of product conformity with this British Standard based on testin
11、g and continuing surveillance, which may be coupled with assessment of a suppliers quality systems against the appropriate Part of BS5750. Enquiries as to the availability of third party certification schemes will be forwarded by BSI to the Association of Certification Bodies. If a third party certi
12、fication scheme does not already exist, users should consider approaching an appropriate body from the list of Association members. 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. Com
13、pliance 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 and ii, pages1 to 4, an inside back cover and a back cover. This standard has been updated (see copyright date) and may ha
14、ve had amendments incorporated. This will be indicated in the amendment table on the inside front cover.BS7364:1990 BSI 09-1999 1 1 Scope This British Standard specifies the requirements for material and dimensional tolerances of steel studs and channels used to form the framework for gypsum wallboa
15、rd lined metal stud partitions and wall linings, where the gypsum wallboards, complying with BS1230-1, conceal the metal framing and are secured to it by screws. It does not specify the number, size, profile and metal thickness of stud and channel selected. This standard does not include components
16、for frame and sheet partitions, panel partitions, frame and panel partitions or components for use in stud and sheet partitions where facings other then gypsum wallboard are used. Structural strength is not specified. NOTEThe titles of the publications referred to in this standard are listed on the
17、inside back cover. 2 Definitions For the purposes of this British Standard the definitions given in BS6100 apply together with the following. NOTEFigure 1 illustrates typical stud and channel profiles, boxed and spliced studs. 2.1 partition 1) internal dividing non-loadbearing vertical construction
18、NOTEIt is incorrect to assume that there is no subjection to incidental loads, particularly lateral loads. 2.2 lining dry covering to any internal building surface 2.3 framed partition 1) partition consisting of a continuously supported plane frame with facings or infillings 2.4 stud and sheet parti
19、tion framed partition in which the studs and other ancillary members are concealed by the facings 2.5 frame and sheet partition framed partition in which the framework is exposed 2.6 panel partition partition of rigid panels without supporting framework 2.7 frame and panel partition framed partition
20、 in which the panels are supported by an exposed framework 2.8 wallboard manufactured sheet or board used to line a wall or partition 2.9 stud 1) one of a number of vertical members in a framed partition 2.10 boxed stud stud made of two sections fixed together to form a box section for most of its l
21、ength 2.11 spliced stud stud made of two sections with overlapping ends fixed together to form a box section for the length of the overlap 2.12 stud cut-out the area cut out of a stud web 2.13 stud knock-out area knocked out of a stud web 2.14 knurled flange exposed surface of flange patterned to fa
22、cilitate the location of screws 2.15 dutch bend free edge of section folded back to form a tight180 bend 2.16 thickness total thickness of steel including coating on both sides 3 Materials Studs and channels shall be manufactured from galvanized mild steel strip, steel grade Z2 and zinc coating type
23、 G275minimum, complying with BS2989. NOTEFor design purposes a minimum yield strength of210N/mm 2is expected for grade Z2steel. 1) Repeated from BS6100.BS7364:1990 2 BSI 09-1999 NOTEFixings to secure boxing and splicing omitted for clarity. Figure 1 Typical stud and channel profiles, boxed stud and
24、spliced studBS7364:1990 BSI 09-1999 3 4 Manufacture 4.1 General Studs and channels shall be cold formed sections and shall comply with clause5. Sections shall be free from kinks and other local deformations that impair their use. NOTESections may include ribs or dutch bends to improve stiffness. 4.2
25、 Cutting and holing Cutting shall be by shearing, cropping or sawing at right angles to the length, unless otherwise specified. Holes shall be punched or drilled. Any excess burrs and sharp edges shall be removed. The size, number and location of cut-outs and knock-outs shall be at the discretion of
26、 the supplier. NOTE 1Depending upon their size, number and location, cut-outs and knock-outs reduce the strength of studs and the effect this is likely to have on the overall performance of the partitions can only be assessed by testing a sample partition. It is envisaged that a method of test for s
27、trength and robustness will be published in a revision of BS5234 which is in preparation. NOTE 2The enlargement of any cut-out or knock-out should be by agreement between the purchaser and the supplier. 4.3 Knurling The outside surface of stud flanges shall be knurled or similarly treated to facilit
28、ate the location of screws used to fix wallboards. 5 Measurement and tolerances 5.1 General The tolerances specified shall apply to both studs and channels unless otherwise stated. The size, profile and metal thickness of the studs and channels shall be agreed at the time of enquiry and order. 5.2 T
29、hickness The thickness, including coating on both sides, shall be measured at any point in the flat area of the web and the tolerance on the thickness shall be as given in Table10 of BS2989:1982 for type G275coating. NOTE 1For convenience, the relevant parts of Table10 of BS2989:1982 have been repro
30、duced in Appendix A. NOTE 2Typical nominal thicknesses are0.55mm,0.7mm and0.9mm. In addition studs may be1.2mm. 5.3 Length Length shall be measured along the web of a straight stud or channel and the tolerance shall be3mm. 5.4 Width 5.4.1 Measurement Widths shall be measured between outside surfaces
31、, in line with metal and at right angles to the length, except for the width of Z stud webs which shall be measured at right angles to the flanges. 5.4.2 Webs Tolerances on stud and channel web widths shall be 0.4mm from the specified dimension. NOTEStud web widths are less than matching channel web
32、 widths seeFigure 1(c). 5.4.3 Flanges Tolerances from the specified flange widths shall be as follows: a) 0.75mm for channels; b) 0.4mm for studs. Stud return flanges shall have a minimum width of6mm. Flanges of asymmetrical C studs shall be dimensioned to facilitate an interlocking assembly as boxe
33、d or spliced studs. NOTEBoxed studs provide increased strength and rigidity, spliced studs provide increased lengths. SeeFigure 1(d) and Figure 1(e). 5.5 Angular tolerances The angular tolerance between web and flange shall be1 from the design angle, except within150mm of the end of the stud or chan
34、nel where it shall be2 . 6 Marking Studs and channels shall be legibly and permanently marked with the following information: a) the number and date of this British Standard, i.e.BS7364:1990 2) ; b) the web width and nominal metal thickness; c) the suppliers identity. 7 Product information The suppl
35、ier shall make available, on request, fully dimensioned drawings of the profiles of the studs and channels. 2) Marking BS7364:1990 on or in relation to a product represents a manufacturers declaration of conformity, i.e.a claim by or on behalf of the manufacturer that the product meets the requireme
36、nts of the standard. The accuracy of the claim is, therefore, solely the responsibility of the person making the claim. Such a declaration is not to be confused with third party certification of conformity, which may also be desirable.BS7364:1990 4 BSI 09-1999 Appendix A Reproduction of Table10 from
37、BS2989:1982 The relevant parts of Table10 ofBS2989:1982 have been reproduced for convenience in Table 1. Table 1 Thickness tolerance for coating type G275 (including coating on both sides) as taken from Table10 ofBS2989:1982 Nominal thickness Normal tolerance for coating type nominal width k 1200mm
38、nominal width 200mm k1500mm mm 0.35 tok 0.40 0.40 tok 0.60 0.60 tok 0.80 0.80 tok 1.00 1.00 tok 1.20 1.20 tok 1.60 1.60 tok 2.00 2.00 tok 2.50 2.50 tok 3.00 3.00 tok 4.00 4.00 tok 5.00 mm 0.05 0.06 0.07 0.08 0.10 0.12 0.14 0.16 0.19 0.23 0.24 mm 0.06 0.07 0.08 0.09 0.11 0.13 0.15 0.17 0.20 0.25 0.26
39、 NOTE 1Products with closer tolerances may be supplied by agreement between manufacturer and purchaser. NOTE 2If thickness is specified as a minimum with tolerances all+, the permissible variation is equal to the total tolerance. For example,a specified minimum thickness of2.60mm permits 0,+ 0.38mm
40、(for materialk 1200mm wide) and the nominal thickness would be2.79mm. However, where as a result, the nominal thickness then falls within the next higher range for nominal thicknesses, the tolerances for the higher range apply, e.g.if a minimum thickness of2.90mm is ordered, the tolerance range woul
41、d be 0,+ 0.46mm (for materialk 1200mm wide) and the nominal thickness would be3.13mm.BS7364:1990 BSI 09-1999 Publication(s) referred to BS1230, Gypsum plasterboard. BS1230-1, Specification for plasterboard excluding materials submitted to secondary operations. BS2989, Specification for continuously
42、hot-dip zinc coated and iron-zinc alloy coated steel: wide strip, sheet/plate and slit wide strip. BS5234, Code of practice. Internal non-loadbearing partitioning 3) . BS5750, Quality systems 4) . BS6100, Glossary of building and civil engineering terms. 3) Under revision. 4) Referred to in the fore
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