《BS-2838-1-1988.pdf》由会员分享，可在线阅读，更多相关《BS-2838-1-1988.pdf（20页珍藏版）》请在三一文库上搜索。
1、BRITISH STANDARD BS 2838-1: 1988 Examination and general treatment couches Part 1: Specification for fixed height couches UDC 615.478.6 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 12:55:14 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 2838-1:1988 This British Standard, having been prepare
2、d under the direction of the Health Care Standards Committee, was published under the authority of the Board of BSI and comes into effect on 30 November 1988 BSI 12-1999 First published as BS 2838 March 1957 First revision March 1972 Second revision as BS 2838-1 The following BSI references relate t
3、o the work on this standard: Committee reference HCC/31 Draft for comment 86/52185 DC ISBN 0 580 16598 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/31, upon which th
4、e following bodies were represented: Associated Offices Technical Committee Association of British Paediatric Nurses Association of National Health Service Supplies Officers British Paediatric Association British Surgical Trades Association Incorporated Chartered Society of Physiotherapy Department
5、of Health and Social Security Health Service Supply Council Independent Engineering Insurers Committee King Edwards Hospital Fund for London Royal College of Midwives Royal College of Nursing and National Council for the Nurses of the United Kingdom Stainless Steel Fabricators Association of Great B
6、ritain Amendments issued since publication Amd. No.Date of issueComments Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 12:55:14 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 2838-1:1988 BSI 12-1999i Contents Page Committees responsibleInside front cover Forewordii 1Scope1 2Definitions1 3Des
7、ign1 4Performance4 5Marking5 Appendix A Recommendations for the information to be provided by a purchaser to a manufacturer or supplier6 Appendix B Static load test6 Appendix C Impact energy test6 Appendix D Cyclic loading test8 Appendix E Static load test for the head section9 Appendix F Durability
8、 test for the head section9 Appendix G Durability test for the frame9 Appendix H Static load test for the body section10 Appendix J Durability test for the body section10 Figure 1 Locations for load tests7 Figure 2 Views of carrier8 Figure 3 Positioning of carrier on head section9 Table 1 Test metho
9、ds and requirements for the durability of the finish on wood2 Table 2 Test methods and requirements for the durability of the paint coatings on metal3 Publications referred to12 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 12:55:14 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 2838-1:1988
10、ii BSI 12-1999 Foreword This Part of BS 2838 has been prepared under the direction of the Health Care Standards Committee. It supersedes BS 2838:1972 which is withdrawn. BS 2838 was originally published in 1957 following a request by the Hospitals Standards Advisory Committee. The first revision, wh
11、ich was completed in 1972, introduced performance requirements to support the design criteria that had been specified earlier. In order to assess the performance of products, tests were designed so that the applied loads and forces induced stresses in the main members and joints that exceeded those
12、to be expected in common use. Products complying with these performance requirements have been found to be generally satisfactory but, in preparing this revision it was considered necessary to make a number of amendments both to the requirements and to the test methods. Principally these are: a) the
13、 introduction of a test for the ignitability of the upholstery; b) the introduction of chipboard as a construction material; c) the introduction of tests for paint coatings applied to metal and wood components; d) the head section is now required to be adjustable through angles up to 65 from the hor
14、izontal. Requirements are also specified for the following features which are included only when requested by the purchaser: 1) an adjustable body section, capable of adjustment up to 40 from the horizontal; 2) a mounting step for metal-framed couches; 3) a breathing hole in the head section of the
15、couch. Recommendations for the information to be provided by a purchaser to a manufacturer or supplier are given in Appendix A. A product complying with this Part of BS 2838 is suitable for normal usage but not necessarily when a patient is to be subjected to short wave diathermy or other high frequ
16、ency electrical treatment. The purchaser should advise the supplier if the couch is likely to be used in connection with this treatment so that any necessary modifications can be included in the design (see clause 1 and Appendix A). This Part of BS 2838 calls for the use of substances and/or procedu
17、res that may be injurious to health if adequate precautions are not taken. The standard refers only to technical suitability and does not absolve the user from legal obligations relating to health and safety at any stage. In particular, attention is drawn to the procedure for testing the ignitabilit
18、y of the upholstery of the couch. This procedure should be carried out by trained personnel under adequate supervision, and precautions should be taken to safeguard the health of personnel against the risk of fire or the inhalation of smoke and toxic products of combustion. Product certification. Us
19、ers of this Part of this British Standard are advised to consider the desirability of third party certification of product conformity with this British Standard based on testing and continuing surveillance, which may be coupled with assessment of a suppliers quality systems against BS 5750-2. (A gui
20、de to the use of BS 5750-2 is given in BS 5750-5.) 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 certification scheme does not already exist, users should consider approaching an appropriate
21、 body from the list of Association members. During the preparation of this revision it was decided that, in addition to a specification for fixed height couches, there was a need for a specification for couches of variable height. Such a specification, to be published as BS 2838-2, is in preparation
22、. Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 12:55:14 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 2838-1:1988 BSI 12-1999iii A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct applicati
23、on. 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 to iv, pages 1 to 12, an inside back cover and a back cover. This standard has been updated (see copyright date) an
24、d may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 12:55:14 GMT+00:00 2006, Uncontrolled Copy, (c) BSI iv blank Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 12:55:14 GMT+00:
25、00 2006, Uncontrolled Copy, (c) BSI BS 2838-1:1988 BSI 12-19991 1 Scope This Part of BS 2838 specifies requirements for materials and for the basic design and performance of examination and general treatment couches of fixed height and of metal and/or wood construction. It is applicable to couches w
26、ith an adjustable head section that are suitable for use in hospitals, clinics, consulting rooms, sick bays and for massage and similar physiotherapy treatment but are not necessarily suitable for use with high frequency electrical equipment (see note 1). Recommendations for information to be suppli
27、ed by the purchaser to the manufacturer or supplier are given in Appendix A. Relevant methods of test are given in Appendix B to Appendix J. NOTE 1If it is known that a couch is likely to be used whilst carrying out treatment with high frequency electrical equipment, the purchaser should advise the
28、supplier of the need for couches that have been designed to allow this use (see Appendix A). NOTE 2The titles of the publications referred to in this standard are listed on page 12. 2 Definitions For the purposes of this Part of BS 2838 the following definitions apply. NOTEDefinitions of paint and r
29、elated terms are given in BS 2015. 2.1 head section the shorter section of the upholstered couch top which is hinged so that it may be raised and adjusted from the horizontal 2.2 body section the larger section of the upholstered couch top which is usually fixed in the horizontal position but which
30、may be adjustable from the horizontal 3 Design 3.1 Dimensions The overall dimensions of the couch shall be within the following limits: The dimensions of the head section shall be within the following limits: NOTE 1The width of the head section should equal the width of the couch. NOTE 2The purchase
31、r should state whether the couch is to have any particular dimensions within the specified ranges (see Appendix A). 3.2 Materials 3.2.1 Timber. The timber shall be free from visible knots, sapwood, shakes and worm-holes with the exception that tight knots are permitted if the diameter does not excee
32、d 12 mm or one-third of the width of the timber in which they occur, whichever is the smaller. All timber, except tie rails, shall be of seasoned hardwood of density not lower than 650 kg/m3. This timber shall have a moisture content of not greater than 12 % (m/m) at the time of assembly of the fram
33、e, as determined by a calibrated moisture meter. NOTEProvided that the moisture content of the timber is not greater than 12 % (m/m) at the time of assembly and the timber is protected as specified in 3.4.1, there will be no significant change in the moisture content during use. 3.2.2 Plywood. The p
34、lywood shall be of hardwood, such as birch or beech, complying with either grade III or grade BB of BS 6566-6. At the time of assembly the moisture content of the plywood shall be 12 2 % (m/m), as determined by a calibrated moisture meter. 3.2.3 Chipboard. All wood chipboard shall comply with type I
35、 chipboard specified in BS 5669. 3.2.4 Tubular steel. Tubular steel shall be solid drawn or electric resistance welded tube complying with BS 6323-5 or BS 6323-6. 3.2.5 Mild steel. Mild steel shall comply with grades 1, 3 or 37/23 specified in BS 1449-1. 3.2.6 Stainless steel. Stainless steel shall
36、comply with grades 304S15, 304S16 or 304S31 specified in BS 1449-2. 3.2.7 Upholstery covering. All covering material shall be PVC coated knitted fabric complying with grade X of BS 5790-1 and, in order to reduce slipping, the coated surface of the covering material shall be embossed. (See also 4.8.)
37、 NOTEThe purchaser should state the pattern and/or colour of the upholstery covering (see Appendix A). 3.2.8 Upholstery filling. The thickness of the upholstery filling shall be not less than 50 mm. The filling shall consist of either: a) latex foam rubber complying with BS 3129 and with a minimum i
38、ndentation hardness index of 265 N; or b) flexible polyether foam of minimum density 50 kg/m3 and with a minimum indentation hardness index of 135 N; or a) length: 1 830 mm to 1 980 mm; b) width:610 mm to840 mm; c) height:460 mm to840 mm. (1) length: 610 mm to 760 mm; (2) width:610 mm to 840 mm. Lic
39、ensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 12:55:14 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 2838-1:1988 2 BSI 12-1999 c) bonded chipfoam of minimum density 64 kg/m3 and with a minimum indentation hardness index of 245 N. For the purposes of this Part of BS 2838 the indentation hardnes
40、s index shall be determined at a thickness of 50 2 mm using procedure A described in BS 4443-2. NOTEThe purchaser should state which type of filling is required (see Appendix A). 3.3 Joints 3.3.1 Adhesives. The adhesives used for timber joints shall comply with BS 745, BS 1204 or BS 4071. The adhesi
41、ves used for plywood joints shall comply with BS 1203. NOTEAttention is drawn to DD 74 which is relevant to the use of adhesives. 3.3.2 Welding. All couches constructed from tubular steel, mild steel, stainless steel or any combination of these materials shall be properly and securely welded to comp
42、ly with BS 3019-2 or BS 5135, as appropriate to the metal. After welding, all joints shall be dressed smooth. NOTEAttention is drawn to BS 4870-1, BS 4871-1 and BS 4872-1 for assessment of welding procedures. 3.4 Finish 3.4.1 Wood. The surface of the wood shall be planed true and sanded smooth. Any
43、staining shall be applied by a spirit stain before finishing. The finish shall be either a pre-catalysed lacquer synthetic finish, consisting of at least one base coat rubbed down before applying a second coat, or a cellulose lacquer applied in accordance with the instructions of the manufacturer of
44、 the lacquer. The finish shall comply with the requirements given in Table 1 when tested by the appropriate methods of test. The preparation of the test panels used in the tests shall be carried out in the same manner and under the same conditions as the finish applied to the wood of the couch. NOTE
45、The purchaser should state whether staining is to be applied and the type of finish required (see Appendix A). 3.4.2 Metal 3.4.2.1 Stainless steel shall either be bright polished or have a satin finish. If bright polished, the steel shall comply with finish no. 8 of Table 1 of BS 1449-2:1983. Table
46、1 Test methods and requirements for the durability of the finish on wood PropertyTest methodTest panel Number of test panels Requirement Resistance to impact BS 3962-6 Impact test Wooden, of same wood as the couch frame and not less than 10 mm thick 3The rating shall be not less than 3 of BS 3962-6
47、Resistance to cross-cuts BS 3962-6 Cross-cut test Wooden, of same wood as the couch frame and not less than 10 mm thick 3The rating shall be not less than 4 of BS 3962-6 Resistance to scrape BS 3962-6 Scrape test with single cutting tool, mechanically operated, determining the forces to penetrate th
48、e coating surface and to penetrate to the substrate Wooden, not less than 10 mm thick 3For surface penetration, the rating shall be not less than 3 of BS 3962-6 For penetration to the substrate, the rating shall be not less than 3 of BS 3962-6 Resistance to liquids BS 3962-4 Exposure time 60 min, us
49、ing test liquids: a) ethanol (94 % (V/V) industrial methylated spirits in water); b) acetone; c) glacial acetic acid, 50 % (V/V) in water. Wooden, of same wood as the couch frame 3The rating shall be not less than 4 of BS 3962-4 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 12:55:14 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 2838-1:1988 BSI 12-19993 3.4.2.2 Prior to painting or coating mild steel, all rust, grease, scale or other adhering matter shall be removed. Mild steel shall be either: a) chromium plated in accordance with service conditio