《BS-MA-89-1980 ISO-5488-1979.pdf》由会员分享，可在线阅读，更多相关《BS-MA-89-1980 ISO-5488-1979.pdf（10页珍藏版）》请在三一文库上搜索。
1、BRITISH STANDARD MARINE SERIES CONFIRMED JULY 1999 BS MA 89:1980 ISO 5488:1979 Specification for Accommodation ladders UDC 629.12.046 Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:20:50 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS MA 89:1980 This British S
2、tandard, having been prepared under the direction of the Shipbuilding and Marine Standards Committee, was published under the authority of the Executive Board and comes into effect on 31 October 1980 BSI 02-2000 The following BSI references relate to the work on this standard: Committee reference SM
3、E/2 Draft for comment 78/76490 DC ISBN 0 580 11640 9 National foreword This British Standard has been prepared under the direction of the Shipbuilding and Marine Standards Committee and is identical with ISO 5448:1979 “Shipbuilding Accommodation ladders” published by the International Organization f
4、or Standardization (ISO). Terminology and conventions. The text of the International Standard has been approved as suitable for publication, without deviation, as a British Standard. Some terminology and certain conventions are not identical with those used in British Standards; attention is especia
5、lly drawn to the following. Where the words “International Standard” appear, referring to this standard, they should be read as “British Standard”. The comma has been used throughout as a decimal marker. In British Standards it is current practice to use a full point on the baseline as the decimal m
6、arker. Related standards and equivalent materials. With reference to the Table of materials in 6.2, the related British Standards for ISO/R 209:1971 are BS 1470:1972 to BS 1475:1972, and for ISO/R 630:1967 the related standard is BS 4360:1979. The technical committee responsible for this British Sta
7、ndard confirms that aluminium designated 5154A in BS 1470 to BS 1472 is equivalent to Al Mg4 in ISO/R 209; that aluminium designated 6082 in BS 1470 to BS 1474 is equivalent to Al Si1 Mg in ISO/R 209; and that steel designated grade 43A in BS 4360 is equivalent to FE 42A in ISO/R 630. NOTEUsers of t
8、his British Standard Marine Series should note that, while observing the requirements of the standard, they should ensure that they comply with such statutory requirements, rules and regulations as may be applicable to the individual vessel concerned. A British Standard does not purport to include a
9、ll the necessary provisions 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 an
10、d ii, pages 1 to 4 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. Amendments issued since publication Amd. No.Date of issueComments Licensed Copy: London South Ba
11、nk University, London South Bank University, Sat Dec 09 02:20:50 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS MA 89:1980 BSI 02-2000i Contents Page National forewordInside front cover 1Scope and field of application1 2References1 3Types1 4Definitions1 5Dimensions1 6Construction1 7Testing2 Figure 1
12、Single-flight ladder2 Figure 2 Multi-flight ladder3 Figure 3 Minimum width, b, and handrail height, a3 Figure 4 Method of testing for each separate flight4 Table Materials2 Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:20:50 GMT+00:00 2006, Uncontrolled Cop
13、y, (c) BSI ii blank Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:20:50 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS MA 89:1980 BSI 02-20001 1 Scope and field of application This International Standard specifies requirements and the method of test for acco
14、mmodation ladders used on merchant ships (excluding passenger ships) to enable persons to embark and disembark safely. The requirements are applicable to either single-flight or multi-flight ladders. 2 References ISO/R 630, Structural steels. ISO/R 209, Composition of wrought products of aluminium a
15、nd aluminium alloys Chemical composition (per cent). 3 Types 3.1 Revolving-platform ladder The ladder, of single-flight or multi-flight construction, is hinged from an upper revolving platform and is capable of being varied in direction and inclination between the ship and the lower access level. Th
16、e ladder may be supported by steel wire ropes or chains from the lower suspension point or by rollers fixed to the bottom of the ladder (see Figure 1 and Figure 2). 3.2 Fixed-platform ladder The ladder is hinged from a fixed anchorage, and is capable of being varied in inclination between the ship a
17、nd the lower access level. This ladder is supported by steel wire ropes or chains from suspension point(s) in the lower part of the ladder (see Figure 1 and Figure 2). This ladder may also be of single-flight or multi-flight construction. 4 Definitions 4.1 Nominal length, L1: 4.1.1 For a single-flig
18、ht ladder, the distance from the centre of the top pin to the centre of the lower platform holding pin (see Figure 1). 4.1.2 For a multi-flight ladder, the sum of the lengths L3 and L4 of the separate flights measured from the centre of the top pin to the centre of the lower pin in each case (see Fi
19、gure 2). 4.2 design length, L2 the maximum distance between supporting points for each separate flight (see Figure 1 and Figure 2) 4.3 width, b the effective width of the walking surface (see Figure 3) 4.4 handrail height, a the vertical height of the upper surface of the handrail, measured from the
20、 highest point of the standing surface presented by the steps when the ladder is horizontal (see Figure 3) 5 Dimensions 5.1 Nominal length, L1 The range of nominal lengths shall be: 3,6 to 7,2 m in 0,6 m increments; 7,2 to 21,6 m in 1,2 m increments; 21,6 to 30,6 m in 1,8 m increments. 5.2 Width, b
21、The width, b, of all ladders shall be 600 mm. 5.3 Distance between steps The distance between the steps measured along the line tangential to the step noses shall be 300 mm. 5.4 Handrail height, a The top handrail height, a, as defined in 4.4 shall be not less than 1 000 mm. An intermediate rail at
22、mid-height shall be provided (see Figure 3). 6 Construction 6.1 Design 6.1.1 Minimum angle of use Ladders of both types shall be designed for safe operation in a horizontal position. 6.1.2 Maximum angle of use With the steps horizontal, the ladder shall operate safely at an angle of 55 from the hori
23、zontal. 6.1.3 Design loading The ladders shall be designed to support a uniform load equivalent to 735 N on every step when the ladder is in a horizontal position. 6.1.4 Step design Individual steps shall be designed to withstand a central point load of 735 N. 6.1.5 Design loading for access and int
24、ermediate platforms The platforms shall be designed to support a uniform loading of 4 000 N/m2. The framework and supporting structure of the upper and intermediate platforms shall in addition be designed to carry the weight of the suspended ladder together with the design load given in 6.1.3. 6.1.6
25、 Design loading for handrail Handrails and supports shall be designed for a side loading at the upper handrail of 500 N/m without permanent deformation. Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:20:50 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS MA 89:
26、1980 2 BSI 02-2000 6.1.7 Support points All support points (pivots, rollers, etc.) and suspension points (lugs, brackets, etc.) shall be of adequate strength to support the weight of the ladder plus the loading stipulated in 6.1.3. 6.1.8 Safety factor The allowable stress used in the design of the l
27、adder, with the loading specified in 6.1.3, shall be determined by applying a safety factor of 2 to the yield point for steel and to the 0,2 % proof stress for aluminium. 6.2 Materials The principal side members of the ladder shall be constructed from steel or aluminium in accordance with the Table,
28、 but alternative materials may be used for these and other components provided that they are at least as suitable in all respects for the intended duty and are equally acceptable to the purchaser. Table Materials 7 Testing 7.1 Procedure A prototype of each design of ladder shall be tested in a horiz
29、ontal position, simply supported at the ends of the design length L2 (see Figure 4), to prove the longitudinal strength and to measure maximum deflection. In the case of multi-flight ladders, each separate flight shall be tested in a similar manner. The ladder shall be loaded with a load equivalent
30、to 735 N on every step. 7.2 Measurement and examination 7.2.1 The maximum deflection of each flight of a ladder when loaded shall not exceed the following: for steel for aluminium 7.2.2 After removal of the test load, the ladder shall be carefully examined to ensure that there are no signs of failur
31、e to the structure and that no permanent deformation has taken place. SteelISO/R 630, Fe 42A or equivalent AluminiumISO/R 209, Al Mg4 or Al Si1 Mg or other suitable alloy L2 100 - - L2 75 - Figure 1 Single-flight ladder Licensed Copy: London South Bank University, London South Bank University, Sat D
32、ec 09 02:20:50 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS MA 89:1980 BSI 02-20003 Figure 2 Multi-flight ladder NOTEThe sections shown are examples only. Figure 3 Minimum width, b, and handrail height, a Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:20:50
33、 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS MA 89:1980 4 BSI 02-2000 Figure 4 Method of testing for each separate flight Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:20:50 GMT+00:00 2006, Uncontrolled Copy, (c) BSI blank Licensed Copy: London South Bank
34、 University, London South Bank University, Sat Dec 09 02:20:50 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS MA 89:1980 ISO 5488:1979 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent national body responsible for preparing British Standards. It presen
35、ts the UK view on standards in Europe and at the international level. It is incorporated by Royal Charter. Revisions British Standards are updated by amendment or revision. Users of British Standards should make sure that they possess the latest amendments or editions. It is the constant aim of BSI
36、to improve the quality of our products and services. We would be grateful if anyone finding an inaccuracy or ambiguity while using this British Standard would inform the Secretary of the technical committee responsible, the identity of which can be found on the inside front cover. Tel: 020 8996 9000
37、. Fax: 020 8996 7400. BSI offers members an individual updating service called PLUS which ensures that subscribers automatically receive the latest editions of standards. Buying standards Orders for all BSI, international and foreign standards publications should be addressed to Customer Services. T
38、el: 020 8996 9001. Fax: 020 8996 7001. In response to orders for international standards, it is BSI policy to supply the BSI implementation of those that have been published as British Standards, unless otherwise requested. Information on standards BSI provides a wide range of information on nationa
39、l, European and international standards through its Library and its Technical Help to Exporters Service. Various BSI electronic information services are also available which give details on all its products and services. Contact the Information Centre. Tel: 020 8996 7111. Fax: 020 8996 7048. Subscri
40、bing members of BSI are kept up to date with standards developments and receive substantial discounts on the purchase price of standards. For details of these and other benefits contact Membership Administration. Tel: 020 8996 7002. Fax: 020 8996 7001. Copyright Copyright subsists in all BSI publica
41、tions. BSI also holds the copyright, in the UK, of the publications of the international standardization bodies. Except as permitted under the Copyright, Designs and Patents Act 1988 no extract may be reproduced, stored in a retrieval system or transmitted in any form or by any means electronic, pho
42、tocopying, recording or otherwise without prior written permission from BSI. This does not preclude the free use, in the course of implementing the standard, of necessary details such as symbols, and size, type or grade designations. If these details are to be used for any other purpose than impleme
43、ntation then the prior written permission of BSI must be obtained. If permission is granted, the terms may include royalty payments or a licensing agreement. Details and advice can be obtained from the Copyright Manager. Tel: 020 8996 7070. Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:20:50 GMT+00:00 2006, Uncontrolled Copy, (c) BSI