BS 5395-4-2011 Code of practice for the design of stairs for limited access《限制进入的楼梯设计实施规范》.pdf
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1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS 5395-4:2011Code of practice for thedesign of stairs for limitedaccessPublishing and copyright informationThe BSI copyright notice displayed in this document indicates when the
2、 documentwas last issued. BSI 2011ISBN 978 0 580 71650 8ICS 91.060.30The following BSI references relate to the work on this standard:Committee reference B/208Draft for comment 10/30228272 DCPublication historyFirst published September 2011Amendments issued since publicationDate Text affectedBS 5395
3、-4:2011 BRITISH STANDARDContentsForeword iiIntroduction 11 Scope 12 Normative references 13 Terms and definitions 24 Safety 25 Types of stair for limited access 36 Slip resistance 14Bibliography 15List of figuresFigure 1 Allowable rise, going and pitch dimensions for limited access stairs5Figure 2 O
4、verall going of a stair by type and floor to floor height 6Figure 3 Straight stair 7Figure 4 Reduced headroom for loft conversions 9Figure 5 Small spiral stair 11Figure 6 Alternating stair tread 13List of tablesTable 1 Choice of limited access stair 4Summary of pagesThis document comprises a front c
5、over, an inside front cover, pages i to iv,pages 1 to 16, an inside back cover and a back cover.BRITISH STANDARD BS 5395-4:2011 BSI 2011 iForewordPublishing informationThis part of BS 5395 is published by BSI and came into effect on30 September 2011. It was prepared by Technical Committee B/208, Sta
6、irs andwalkways. A list of organizations represented on this committee can beobtained on request to its secretary.Relationship with other publicationsBS 5395 is published in three parts, as follows: Part 1: Code of practice for the design of stairs with straight flights andwinders; Part 2: Code of p
7、ractice for the design of helical and spiral stairs; Part 3: Code of practice for the design of industrial type stairs, permanentladders and walkways (declared obsolescent); Part 4: Code of practice for the design for stairs for limited access.Information about this documentBSI committee, B/208, tak
8、es collective responsibility for its preparation. Thecommittee wishes to acknowledge the contribution of the Building ResearchEstablishment (BRE), whose report 202591 1 was used as the basis for thisstandard.Use of this documentAs a code of practice, this part of BS 5395 takes the form of guidance a
9、ndrecommendations. It should not be quoted as if it were a specification andparticular care should be taken to ensure that claims of compliance are notmisleading.Any user claiming compliance with this part of BS 5395 is expected to be able tojustify any course of action that deviates from its recomm
10、endations.It has been assumed in the preparation of this British Standard that theexecution of its provisions will be entrusted to appropriately qualified andexperienced people, for whose use it has been produced.Where methods of design, materials, components and methods of constructionare not cover
11、ed by this standard, or by any other British Standard, this is notnecessarily to be regarded as discouraging their use.Presentational conventionsThe provisions in this standard are presented in roman (i.e. upright) type. Itsrecommendations are expressed in sentences in which the principal auxiliaryv
12、erb is “should”.Commentary, explanation and general informative material is presented insmaller italic type, and does not constitute a normative element.The word “should” is used to express recommendations of this standard. Theword “may” is used in the text to express permissibility, e.g. as an alte
13、rnative tothe primary recommendation of the clause. The word “can” is used to expresspossibility, e.g. a consequence of an action or an event.Notes and commentaries are provided throughout the text of this standard.Notes give references and additional information that are important but do notform pa
14、rt of the recommendations. Commentaries give background information.BRITISH STANDARDBS 5395-4:2011ii BSI 2011Contractual and legal considerationsThis publication does not purport to include all the necessary provisions of acontract. Users are responsible for its correct application.Compliance with a
15、 British Standard cannot confer immunity from legalobligations.Attention is drawn to the requirements of the Building Regulations for Englandand Wales 2, The Building Regulations (Northern Ireland) 3 and The Building(Scotland) Regulations 4.BRITISH STANDARD BS 5395-4:2011 BSI 2011 iiiBRITISH STANDAR
16、DBS 5395-4:2011This page deliberately left blankiv BSI 2011IntroductionIn the United Kingdom there are over 500 deaths each year1)from stair relatedaccidents in the home. It is estimated that a further 250 000 non-fatal accidents2)take place on stairs in the home each year, which are serious enough
17、to causethe victim to visit their General Practitioner or Hospital Accident and Emergencydepartment. This is equivalent to a domestic accident on stairs occurring every2.5 minutes. From 2003 onwards, there were over twice as many deaths due tofalls on or from steps and stairs as there were due to ex
18、posure to smoke, fireand flames in England and Wales.Young children and elderly people are particularly at risk from falls on stairs.Nearly 20% of the non-fatal domestic accidents on stairs happen to children lessthan 4 years of age, and 70% of the fatal accidents occur to adults over 65 yearsof age
19、.The most important aspects of stair design that affects the safety of users arethe tread dimensions. If a going is too small to easily place a significantproportion of the foot upon, it increases the likelihood of an overstep. Researchsuggests that large oversteps, coupled with the type of material
20、 on the stairnosing, can lead to a slip in descent. If there are no suitable handrails, or theperson cannot reach them in time, this slip can lead to a serious incident.The uniformity of steps is also very important, because even a small decrease inthe size of a going can lead to a significant incre
21、ase in the likelihood of a largeoverstep. This small difference in the size of goings is particularly important ifthe going is less than 300 mm.Under normal walking conditions the placement of feet on successive treads isnot completely consistent, but instead there is limited variation within footpl
22、acement on a stair tread. Therefore, there is a possibility that a large overstepcan occur when descending any stair, although this risk is dramatically reducedby increasing the size of the going, and by limiting the variation betweensuccessive treads.1 ScopeThis part of BS 5395 gives recommendation
23、s for the design of stairs suitable foruse in limited access situations for dwellings only. Such stairs include straight,spiral and alternating tread stair designs.Limited access for industrial settings is covered in BS EN ISO 14122, BS 5395-33)and BS 4211. These standards apply to all limited acces
24、s situations fornon-domestic buildings.2 Normative referencesThe following referenced documents are indispensable for the application ofthis document. For dated references, only the edition cited applies. For undatedreferences, the latest edition of the referenced document (including anyamendments)
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