1、BRITISH STANDARD BS 6381:1983 Specification for Drawing boards UDC 686.88:744.32BS6381:1983 This British Standard, having been prepared under the directionof the Office and Information Standards Committee, was published underthe authority of the Board ofBSI and comes into effect on 30June1983 BSI 12
2、-1999 The following BSI references relate to the work on this standard: Committee reference OIS/28 Draft for comment 82/62424 DC ISBN 0 580 13321 4 Committees responsible for this British Standard This British Standard was published under the direction of the Office and Information Standards Committ
3、ee OIS/-. Its preparation was entrusted to Technical Committee OIS/28 upon which the following bodies were represented: County Surveyors Society Department of the Environment (PSA) Drawing Office Material Manufacturers and Dealers Association Electricity Supply Industry in England and Wales Engineer
4、ing Equipment and Materials Users Association Amendments issued since publication Amd. No. Date of issue CommentsBS6381:1983 BSI 12-1999 i Contents Page Committees responsible Inside front cover Foreword ii 1 Scope 1 2 Dimensions and designation 1 3 Working edges 1 4 Working surfaces 1 5 Battens 1 6
5、 Packaging 1 Appendix A Guidance on the selection of materials 2 Table 1 Dimensions and designation 1 Publications referred to Inside back coverBS6381:1983 ii BSI 12-1999 Foreword This British Standard has been prepared under the direction of the Office and Information Standards Committee. It supers
6、edes BS4867-1:1972 and BS5065:1974 which are both withdrawn. In addition to the sizes of drawing board previously designated in these standards, three sizes have been introduced in this standard, namelyA1ext., A0ext. and2A0. A British Standard does not purport to include all the necessary provisions
7、 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 and ii, pages1 and 2, an insi
8、de 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 the inside front cover.BS6381:1983 BSI 12-1999 1 1 Scope This British Standard specifies requirements for drawing boards, for
9、 professional use and for student use, for use with tee squares, parallel-motion units and drafting machines. Appendix A gives guidance on the selection of materials. NOTEThe titles of the publications referred to in this standard are listed on the inside back cover. 2 Dimensions and designation 2.1
10、 Depth and width. The depth and width of the boards shall be as shown inTable 1 within a tolerance of 2.0mm. 2.2 Thickness. The thickness of the boards shall be not less than that given inTable 1. 2.3 Designation. Boards shall be designated according to their dimensions, as shown inTable 1. The desi
11、gnationA1 shall be completed by the word “professional” or “student” as appropriate. 3 Working edges 3.1 Opposite edges. Opposite edges shall be parallel within a tolerance of 0.5mm over each1.0m length of working edge. 3.2 Straightness. When a steel straightedge, complying with the requirements for
12、 grade A of BS5204-2, is placed along a working edge, that edge shall not deviate from the straightedge by more than0.25mm over each1.0m length of the working edge. Table 1 Dimensions and designation 4 Working surfaces When a steel straightedge,1.0m long and complying with the requirements for grade
13、 A of BS5204-2, is placed on a working surface, the surface shall not deviate from the straightedge by more than1.5mm, irrespective of the position of the straightedge on the surface. 5 Battens If battens are supplied with the board, they shall extend across not less than80% of the depth of the boar
14、d and shall be fixed to the board in a manner that leaves the board free to expand and contract. 6 Packaging 6.1 Professional boards. Each board shall be individually and entirely enveloped in a protective cover designed to protect the surfaces, edges and corners of the board. 6.2 Student boards. Ei
15、ther each board shall be packaged individually as specified in6.1, or several boards shall be packaged together in a carton with their faces separated by a non-abrasive medium. NOTEDrawing boards should be stored flat before use and, as far as possible, supported over their whole surface. In no circ
16、umstances should they be supported between battens or leant against vertical surfaces. During storage extremes of temperature and humidity should be avoided. Designation Depth Width Minimum thickness Professional boards Student boards mm mm mm mm A2 470 650 Not applicable 15 A1 650 920 22 15 A1 ext.
17、 650 1 200 22 Not applicable A0 920 1 270 22 A0 ext. 920 1 500 22 A0a 920 1 370 22 2A0 1 250 1 750 22 NOTEThe designation indicates that the board will accept paper of similar size designation in accordance with BS4000. The sizes of the boards exceed the paper sizes so as to provide adequate margins
18、. BS6381:1983 2 BSI 12-1999 Appendix A Guidance on the selection of materials A.1 General materials The material of which a drawing board is made should be chosen to meet the requirements of clauses3 and4 and to maintain trueness of shape and dimension throughout storage and use. Suitable materials
19、from which selection may be made include blockboard, laminboard, high-density particle board and properly seasoned softwood. The material should be free of voids and other characteristics that might interfere with the fixture of attachments to the board. A.2 Surfacing material If a plastics surfacin
20、g material is used, it should be resistant to the organic solvents commonly used in drawing offices.BS6381:1983 BSI 12-1999 Publications referred to BS 4000, Specification for sizes of paper and board. BS 5204, Specification for straightedges. BS 5204-2, Steel or granite straightedges of rectangular
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