BS 3459-1985 Specification for stands for drawing boards《制图板支架规范》.pdf

1、BRITISH STANDARD BS3459:1985 Specification for Stands for drawing boards UDC 686.88:744.32:62-219BS3459:1985 This BritishStandard, having been prepared under the directionof the Office and Information Standards Committee, was published underthe authority of the BoardofBSI and comesintoeffecton 31May

2、1985 BSI12-1999 First published August1974 First revision May1985 The following BSI references relate to the work on this standard: Committee referenceOIS/28 Draft for comment83/62153DC ISBN 0 580 13947 6 Committees responsible for this British Standard The preparation of this BritishStandard was en

3、trusted by the Office and Information Standards Committee (OIS/-) to Technical CommitteeOIS/28, upon which the following bodies were represented: County Surveyors Society Department of the Environment (Property Services Agency) Drawing Office Material Manufacturers and Dealers Association Electricit

4、y Supply Industry in England and Wales Engineering Equipment and Materials Users Association Post Office Writing Instruments Association Amendments issued since publication Amd. No. Date of issue CommentsBS3459:1985 BSI 12-1999 i Contents Page Committees responsible Inside front cover Foreword ii 1

5、Scope 1 2 Definitions 1 3 Designation 1 4 Bench-mounted stands 1 5 Simple free-standing stands 1 6 Fully adjustable free-standing stands 1 Figure 1 Bench-mounted stand 2 Figure 2 Simple free-standing stand 3 Publications referred to Inside back coverBS3459:1985 ii BSI 12-1999 Foreword This revision

6、of BS3459 is published under the direction of the Office and Information Standards Committee; it supersedes the1974 edition which is withdrawn. In this revision account is taken of the range of sizes of drawing boards as specified in BS6381, but the fully adjustable free-standing stands are no longe

7、r required to accommodate boards designated2A0 because of the relatively small demand for these boards and because their safe and adequate support during use requires special measures beyond the design of the stands specified in this standard. In this revision, the requirements for bench-mounted sta

8、nds are the same irrespective of whether the mounting is designed to be attached to the upper surface of a bench or desk top, or to the underside. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct a

9、pplication. 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, pagesi andii, pages1 to4, an inside back cover and a back cover. This standard has been updated (see copyright date

10、) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover.BS3459:1985 BSI 12-1999 1 1 Scope This British Standard specifies dimensional and functional requirements for the following types of stands for drawing boards: a) bench-mounted stands;

11、 b) simple free-standing stands; c) fully adjustable free-standing stands. NOTEThe titles of the publications referred to in this standard are listed on the inside back cover. 2 Definitions For the purposes of this BritishStandard, the following definitions apply. 2.1 bench-mounted stand a drawing b

12、oard stand suitable for attachment to desks or benches710mm to840mm high; counterbalanced adjustment for height and angle of board may be fitted 2.2 simple free-standing stand a drawing board stand that is complete in itself with provision for adjustment of the height and angle of the board. On this

13、 type of stand the height adjustment lock is used infrequently and therefore need not be so readily accessible as on fully adjustable free-standing stands. A counterbalancing device may be provided 2.3 fully adjustable free-standing stand a drawing board stand that is complete in itself with counter

14、balanced adjustment for height and angle of the board. In some cases rotational adjustment is also provided. Adjustment may be power-operated 3 Designation Stands shall be designated according to type as defined in clause2. 4 Bench-mounted stands 4.1 Sizes of drawing board Throughout its range of ad

15、justments, the stand shall accommodate drawing boards designated asA0,A0 ext., A1andA1 ext., complying with BS6381. 4.2 Dimensional and functional requirements (see Figure 1) 4.2.1 The minimum height adjustment shall be250mm, measured in the plane of the board. 4.2.2 The minimum angular adjustment s

16、hall extend from the horizontal (i.e.the plane of the supporting desk, or bench) to80 from the horizontal. In the horizontal position, the face of a drawing board complying with BS6381 shall be no further than250mm from the top of the desk or bench. The underside of the stand when in the horizontal

17、position shall be at least110mm from the top of the desk or bench. 4.2.3 When adjusted to as near vertical as possible and at the lowest height setting, the lower edge of a board complying with BS6381 shall be no more than110mm from the plane of the top of the desk or bench. 5 Simple free-standing s

18、tands 5.1 Sizes of drawing board Throughout its range of adjustments, the stand shall accommodate drawing boards designated asA0,A0 ext.,A1 andA1 ext., complying with BS6381. 5.2 Dimensional and functional requirements (see Figure 2) 5.2.1 The minimum height adjustment shall be250mm, measured vertic

19、ally with a board complying with BS6381 in the horizontal position. 5.2.2 When the height adjustment is at its lowest position and a board, complying with BS6381, is in position and is adjusted to be horizontal, the working face of the board shall be not more than900mm from the floor. 5.2.3 The mini

20、mum angular adjustment shall extend from the horizontal to80 from the horizontal. 5.2.4 With the adjustment as near vertical as possible, the distance from the lower edge of a board complying with BS6381 to the floor shall be not less than600mm at the maximum height setting. 5.2.5 The base of the st

21、and shall incorporate a means of adjustment whereby irregularities in a horizontal floor can be accommodated so that the stand is steady and vertical. 5.2.6 If the legs of the stand can be folded, the stand shall be fitted with a positive stop that can prevent collapse of the legs during use. 6 Full

22、y adjustable free-standing stands 6.1 Sizes of drawing board Throughout its range of adjustments, the stand shall accommodate drawing boards designated asA0,A0 ext.,A1 andA1 ext., complying with BS6381.BS3459:1985 2 BSI 12-1999 6.2 Dimensional and functional requirements 6.2.1 When the adjustment is

23、 set for a board complying with BS6381 in its most nearly horizontal position, the minimum height adjustment shall be300mm. 6.2.2 The stand shall comply with the requirements of5.2.2, 5.2.3 and5.2.4. 6.2.3 If rotational adjustment about a vertical axis is provided, the adjustment shall be at least17

24、0 at all height settings. 6.2.4 Electrically operated stands shall comply with the relevant requirements of BS5850. NOTEFor recommendations for hydraulic cylinders and controls, see BS4575-1. 6.2.5 A system shall be fitted so that the height adjustment and the angular adjustment are each counterbala

25、nced during their operation. Figure 1 Bench-mounted standBS3459:1985 BSI 12-1999 3 Figure 2 Simple free-standing stand4 blankBS3459:1985 BSI 12-1999 Publications referred to BS4575, Guide for application of fluid power equipment to transmission and control systems. BS4575-1, Hydraulic equipment. BS5

26、850, Specification for safety of electrically energized office machines. BS6381, Specification for drawing boards. BS3459:1985 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent national body responsible for preparing BritishStandards. It presents the UK v

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