1、BRITISH STANDARD BS2099:1989 Incorporating Amendment No.1 Specification for Castors for hospital equipment UDC645.461:615.478:001.4:.001.3.004.15:(088.7):620.1BS2099:1989 This British Standard, having been prepared under the directionof the Health Care Standards Committee, was published under the au
2、thority ofthe Board of BSI and comes intoeffect on 28 February 1989 BSI 06-1999 First published as BS2099-1: December 1970 First revision, as BS2099, February 1989 The following BSI references relate to the work on this standard: Committee reference HCC/33 Draft for comment87/52401 DC ISBN 0 580 167
3、94 1 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Health Care Standards Committee (HCC/-) to Technical Committee HCC/33, upon which the following bodies were represented: Association of Anaesthetists of Great Britain and Ireland Assoc
4、iation of Clinical Pathologists British Medical Association British Surgical Trades Association Incorporated Castor Manufacturers (UK) Association Department of Health and Social Security Department of the Environment (Property Services Agency) Joint Committee of Professional Nursing, Midwifery and
5、Health Visiting Associations (England) Malaysian Rubber Producers Research Association National Association of Theatre Nurses National Health Services Royal College of Nursing and National Council for Nurses of the United Kingdom Royal College of Surgeons of England Amendments issued since publicati
6、on Amd. No. Date of issue Comments 6252 November 1989 Indicated by a sideline in the marginBS2099:1989 BSI 06-1999 i Contents Page Committees responsible Inside front cover Foreword ii 1 Scope 1 2 Definitions 1 3 Dimensions of castors and top plates 1 4 Means of attachment 1 5 Performance 1 6 Antist
7、atic castors 2 7 Identification and marking 2 Appendix A Method of test for swivel locking of total lock and directional lock castors 6 Appendix B Method of test for wheel lock 6 Appendix C Method of test for tyre wear, wheel rock and swivel rock 6 Appendix D Method of test for electrical resistance
8、 8 Figure 1 Typical swivel castor 3 Figure 2 Typical swivel castor with a centrally-operated directional or total lock 5 Figure 3 Test apparatus for total lock, directional lock and wheel lock 7 Figure 4 Section through hazard 8 Figure 5 Wheel rock 8 Figure 6 Swivel rock 8 Table 1 Dimensions of all
9、castors, except for swivel castors with a centrally-operated directional or total lock 2 Table 2 Dimensions of swivel castors with a centrally-operated directional or total lock 4 Table 3 Dimensions of top plates 5 Table 4 Maximum wheel rock and swivel rock 5 Table 5 Test loads and running times 6 P
10、ublication referred to Inside back coverBS2099:1989 ii BSI 06-1999 Foreword This British Standard has been prepared under the direction of the Health Care Standards Committee. It supersedes BS2099-1:1970, which is withdrawn. This standard was originally published as BS2099 and revised in 1970 as Par
11、t1 because, at that time, the intention was to issue further Parts to specify requirements for castors for other purposes. Although that is still the intention, these standards will not now be published as Parts of BS2099. The Part number has therefore been dropped. A number of changes have been mad
12、e to the standard to bring its requirements into line with current practice and the main changes made from the previous edition are as follows. a) The scope of the standard has been restricted to castors with wheels having diameters from63mm to250mm. b) The lightweight class of castor has been delet
13、ed together with the drive plug type of fitting as this was only used on lightweight castors. c) Requirements have been included for castors with a centrally-operated directional or total lock system. Test methods for the locking system have also been introduced. d) Requirements are no longer includ
14、ed for materials and finish. e) The identification code for castors has been expanded to encompass different locking systems and it is now required that all castors are marked with an identification code. A British Standard does not purport to include all the necessary provisions of a contract. User
15、s 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, pages1to8, an inside back cover and a bac
16、k cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on theinside front cover.BS2099:1989 BSI 06-1999 1 1 Scope This British Standard specifies requirements for castors having diameters from63mm to250mm i
17、ntended for use on items of hospital equipment used for the transport of patients, equipment that is frequently mobile in use and equipment used within the operating theatre, for example patient trolleys, beds, cylinder trolleys and instrument trolleys. Castors intended for use on hospital furniture
18、 which is used only on the ward and which is infrequently mobile, for example bedside lockers and four fold screens, together with castors intended for use on heavy mobile equipment, for example portable X-ray machines and food trolleys, are outside the scope of this standard. NOTEThe title of the p
19、ublication referred to in this standard is given on the inside back cover. 2 Definitions For the purposes of this British Standard, the following definitions apply. 2.1 swivel castor a castor that is free to swivel without restriction about its vertical axis 2.2 fixed castor a castor that cannot swi
20、vel about its vertical axis NOTEFixed castors are also known as fixed wheel brackets, rigids, stationary castors and non-swivel castors. 2.3 inclined axle castor a castor having an axle inclined to the horizontal plane 2.4 twin wheel castor a castor comprising two wheels that are free to rotate inde
21、pendently 2.5 swept radius the radius of the circle produced by the outer edge of the wheel of a swivel castor, when swivelling about its vertical axis, measured through the horizontal plane of the axle NOTEWheel locks, swivel locks and brake fittings may project beyond the swept radius. 2.6 wheel l
22、ock a device that immobilizes the wheel and is applied when stationary 2.7 directional lock a device that immobilizes only the swivel action of a swivel castor in each of two positions at180 to each other 2.8 total lock a device that immobilizes both the wheel rotation and swivel action and is appli
23、ed when stationary 3 Dimensions of castors and top plates 3.1 Except for swivel castors with a centrally-operated directional or total lock, the dimensions of castors shall be as given in Table 1. 3.2 The dimensions of swivel castors with a centrally-operated directional or total lock shall be as gi
24、ven in Table 2. 3.3 For castors with plate fittings, the dimensions of top plates shall be as given in Table 3. 4 Means of attachment The means of attachment of castors to equipment shall be by one of the following fittings: a) solid plug; b) expansile plug; c) screw plug; d) plate; e) bolt. 5 Perfo
25、rmance 5.1 Swivel and movement on lock 5.1.1 For castors with total lock and directional lock, when tested as described in Appendix A, there shall be no movement of the swivel. 5.1.2 For castors with total lock and wheel lock, when tested as described in Appendix B, there shall be no movement of the
26、 wheel. 5.2 Tyre wear, wheel rock and swivel rock When tested as described in Appendix C, all castors shall comply with the following requirements. a) The reduction in wheel diameter shall not exceed3% of the original diameter. b) The maximum wheel rock shall be as given in Table 4. c) For swivel ca
27、stors, the maximum swivel rock shall be as given in Table 4. For castors with a total lock, directional lock or wheel lock, the test described in Appendix C shall be carried out after testing for compliance with the requirements given in5.1.1 and/or5.1.2, as appropriate.BS2099:1989 2 BSI 06-1999 6 A
28、ntistatic castors When tested as described in Appendix D, castors marked as being antistatic (see7.2) shall have a maximum resistance of10k7. 7 Identification and marking 7.1 All castors shall be permanently and legibly marked or labelled with the following: a) the name and/or trade mark of the manu
29、facturer; b) the number and date of this British Standard, i.e.BS2099:1989 1) ; c) an identification code comprising the following: 1) the letters HN; 2) a letter(s) to denote a particular feature(s) as follows: S to denote a swivel castor; T to denote incorporation of a total lock; D to denote inco
30、rporation of a directional lock; L to denote incorporation of a centrally-operated locking system. 3) the nominal wheel diameter in millimetres. NOTEAs an example, a swivel castor having a nominal wheel diameter of150mm with a centrally-operated total lock will bear the identification code HNSTL150.
31、 7.2 The outside surface of antistatic castors shall bear a permanent yellow mark not less than500mm 2in area. NOTEThe colour should be as close as possible to colour no.355 Lemon of BS381C. Table 1Dimensions of all castors, except for swivel castors with a centrally-operated directional or total lo
32、ck 1) Marking BS2099:1989 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 requirements of the standard. The accuracy of the claim is therefore solely the responsibility of the person makin
33、g the claim. Such a declaration is not to be confused with third party certification of conformity, which may also be desirable. Nominal wheel diameter Wheel diameter W a Swept radius (maximum) R b Effective height plate type (maximum) E a Effective height plug type (maximum) E a Plug length (maximu
34、m) L a Grease nipple or fixing screw height for castors with solid plug fittings N a Additional fixing screw height for castors with soild plug fittings S a mm mm mm mm mm mm mm 0.5 mm 0.5 63 63 65 90 90 50 12.5 75 75 65 100 110 90 58.5 12.5 100 100 90 145 135 90 58.5 12.5 125 125 110 160 175 100 58
35、.5 12.5 140 140 110 190 175 100 58.5 12.5 150 150 125 195 185 100 58.5 12.5 200 200 165 265 240 100 58.5 12.5 225 225 185 315 260 100 58.5 12.5 250 250 205 315 295 100 58.5 12.5 NOTE 1Plug diameter is not specified. This should be agreed between purchaser and supplier. NOTE 2By virtue of their desig
36、n, inclined axle and twin wheel castors enable a larger diameter wheel to be used within the range of effective heights. For example, an inclined axle castor with a wheel diameter of150mm may have the effective height of a conventional castor with a wheel diameter of125mm. a See Figure 1. b In this
37、standard R is the swept radius (see Figure 1) and this is equivalent to SR which was shown in Table 1 of BS2099-1:1970.2 + 0 %BS 2099:1989 BSI 06-1999 3 Figure 1 Typical swivel castorBS 2099:1989 4 BSI 06-1999 Table 2Dimensions of swivel castors with a centrally-operated directional or total lock No
38、minal wheel diameter Wheel diameter W a Swept radius (maximum) R b Effective height (maximum) E a Plug length (maximum) L a Plug diameter P a Fixing screw S a Screw thread Drive bar centre M a Drive bar Drive bar operating angle (maximum) A a Hexagon across flats D-section bar diameter mm mm 1% mm m
39、m mm mm mm 1 mm mm 1 mm mm degrees 125 125 110 170 105 28 19 8 79 11 14 120 150 150 125 190 105 28 19 8 79 11 14 120 200 200 165 240 105 28 19 8 79 11 14 120 250 250 205 285 105 28 19 8 79 11 14 120 NOTEBy virtue of their design, inclined axle and twin wheel castors enable a larger diameter wheel to
40、 be used within the range of effective heights. For example, an inclined axle castor with a wheel diameter of150mm may have the effective height of a conventional castor with a wheel diameter of125mm. a See Figure 2. b in this standard, R is the swept radius (see Figure 2) and this is equivalent to
41、SR which was shown in Table 1 of BS2099-1:1970.0 +0.3 0 +0.1 0 +0.1 BS2099:1989 BSI 06-1999 5 Table 3 Dimensions of top plates Table 4 Maximum wheel rock and swivel rock Figure 2 Typical swivel castor with a centrally-operated directional or total lock Nominal wheel diameter Plate size F a G a Hole
42、centres H a J a Diameter of bolt to be accepted by bolt hole mm mm mm mm 100 115 85 or 80 60 or 8 or10 145 110 105 80 125 115 85, 80 60, 8,10 or12 145 110 or 105 80 or 175 140 140 105 150 145 110 or 105 80 or 10 or12 175 140 140 105 200 145 110 or 105 80 or 10 or12 175 140 140 105 250 175 140 140 10
43、5 12 a See Figure 1. Nominal wheel diameter Maximum wheel rock Maximum swivel rock mm mm mm 63 0.5 0.75 75 0.5 0.75 100 1.0 1.00 125 1.0 1.25 140 1.0 1.40 150 1.0 1.50 200 2.0 2.00 225 2.0 2.20 250 2.0 2.40BS2099:1989 6 BSI 06-1999 Appendix A Method of test for swivel locking of total lock and direc
44、tional lock castors A.1 Apparatus A.1.1 Spring balance, that records up to50kg. A.1.2 Test apparatus, as shown in Figure 3. A.2 Procedure Mount the castor on the test apparatus(A.1.2) with the castor positioned such that the wheel is parallel with the arm of the test apparatus. Apply the load of80kg
45、 to the castor and engage either the total lock or the directional lock, as appropriate. Hook the spring balance(A.1.1) onto the castor mounting collar at90 to the wheel and apply a pull force until the spring balance reads10kg, to take up any slack, and then increase the pull force until the spring
46、 balance reads30kg. Maintain this force for10s. Release the force and then re-apply twice more. Repeat the procedure with the spring balance hooked at90 to the opposite side of the wheel. Appendix B Method of test for wheellock B.1 Apparatus B.1.1 Spring balance, that records up to50kg. B.1.2 Test a
47、pparatus, as shown in Figure 3. B.2 Procedure Mount the castor on the test apparatus(B.1.2) with the castor positioned such that the wheel is at90 to the arm of the test apparatus. Apply the load of80kg to the castor and engage the wheel lock. Hook the spring balance(B.1.1) onto the castor mounting
48、collar parallel to the wheel and apply a pull force until the spring balance reads30kg. Maintain this force for10s. Release the force and then re-apply twice more. Move the spring balance through180 and repeat the procedure. Appendix C Method of test for tyre wear, wheel rock and swivel rock C.1 Pri
49、nciple The castor is subjected to a static load followed by periods of smooth running and hazards running after which any tyre wear, wheel rock and swivel rock are measured. C.2 Test conditions Carry out all tests at an ambient temperature of15 C to20 C. For each part of the test, except for the assessment of wheel rock and swivel rock, mount the castor in its normal vertical operating position on a flat steel surface free from visible dirt and apply the test loads at the point where the castor i
