1、BRITISH STANDARDBS EN 14843:2007Precast concrete products StairsThe European Standard EN 14843:2007 has the status of a British StandardICS 91.060.30; 91.100.30g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44
2、g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 14843:2007This British Standard was published under the authority of the Standards Policy and Strategy Committee on 29 June 2007 BSI 2007ISBN 978 0 580 52929 0National forewordThis British Standard was published by BSI. It is the UK i
3、mplementation of EN 14843:2007. The UK participation in its preparation was entrusted to Technical Committee B/524, Precast concrete products.A list of organizations represented on this committee can be obtained on request to its secretary.EN 14843 is a candidate “harmonized” European standard and f
4、ully takes into account the requirements of the European Commission mandate M/100, Products related to precast concrete, given under the EU Construction Products Directive (89/106/EEC), and is intended to lead to CE marking. The date of applicability of EN 14843 as a harmonized European Standard, i.
5、e. the date after which this standard may be used for CE marking purposes, is subject to an announcement in the Official Journal of the European Communities.The Commission in consultation with Member States has agreed a transition period for the co-existence of harmonized European Standards and thei
6、r corresponding national standard(s). It is intended that this period will comprise a period, usually nine months, after the date of availability of the European Standard, during which any required changes to national regulations are to be made, followed by a further period, usually of 12 months, fo
7、r the implementation of CE marking. At the end of this co-existence period, the national standard (s) will be withdrawn. EN 14843 is the subject of transitional arrangements agreed under the Commission mandate. In the UK, there are no corresponding national standards.This publication does not purpor
8、t to include all the necessary provisions of a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations.Amendments issued since publicationAmd. No. Date CommentsEUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 14843
9、April 2007ICS 91.100.30English VersionPrecast concrete products - StairsProduits prfabriqus en bton - Escaliers Betonfertigteile - TreppenThis European Standard was approved by CEN on 17 February 2007.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the condi
10、tions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the CEN Management Centre or to any CEN member.This European Standard exists in three o
11、fficial versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as theofficial versions.CEN members are the national standards bodies of Austria
12、, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE
13、FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2007 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 14843:2007: EEN 14843:2007(E) 2 Contents Page
14、The numbering of clauses is strictly related to EN 13369:2004: Common rules for precast concrete products, at least for the first three digits. When a clause of EN 13369:2004 is not relevant or included in a more general reference of this standard, its number is omitted and this may result in a gap
15、in numbering. Introduction .6 1 Scope 7 2 Normative references 7 3 Terms and definitions .8 3.1 General8 4 Requirements.8 4.1 Material requirements .8 4.2 Production requirements 8 4.3 Finished product requirements8 4.3.1 Geometrical properties .8 4.3.2 Surface characteristics .9 4.3.3 Mechanical re
16、sistance.9 4.3.4 Resistance and reaction to fire 10 4.3.5 Acoustic properties .10 4.3.6 Thermal properties 10 4.3.7 Durability 10 4.3.8 Other requirements10 4.3.9 Detailing10 5 Test methods11 5.1 Tests on concrete 11 5.2 Measuring of dimensions and surface characteristics .11 5.3 Weight of the produ
17、ct11 6 Evaluation of conformity.11 7 Marking .12 8 Technical documentation .12 Annex A (informative) Stairs Terms and definitions.13 Annex B (informative) Test Method.20 B.1 Objectives.20 B.2 Specification and selection of specimens 20 B.2.1 Identification of product group 20 B.2.2 Design of test sp
18、ecimens .20 Annex Y (Informative) Choice of CE marking method.25 Y.1 Method 1 .25 Y.2 Method 2 .25 Y.3 Method 3 .25 Annex ZA (informative) Clauses of this European Standard addressing the provisions of the EU Constructions Product Directive26 ZA.1 Scope and relevant characteristics .26 ZA.2 Procedur
19、e for attestation of conformity of stairs.28 ZA.2.1 System of attestation of conformity 28 ZA.2.2 EC Certificate and Declaration of conformity.29 ZA.3 CE marking and labelling30 EN 14843:2007(E) 3 ZA.3.1 General .30 ZA.3.2 Declaration of geometrical data and material properties32 ZA.3.3 Declaration
20、of product properties .33 ZA.3.4 Declaration of compliance with a given design specification 35 Bibliography38 EN 14843:2007(E) 4 Foreword This document (EN 14843:2007) has been prepared by Technical Committee CEN/TC 229 “Precast concrete products”, the secretariat of which is held by AFNOR and was
21、examined by and agreed with a joint working party appointed by the Liaison Group CEN/TC 229-TC250, particularly for its compatibility with structural Eurocodes. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at t
22、he latest by October 2007, and conflicting national standards shall be withdrawn at the latest by January 2009. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association, and supports essential requirements of EU Construction Prod
23、ucts Directive(s) (89/106/EEC). For relationship with EU Directive(s), see informative Annex ZA, which is an integral part of this document. This document is one of a series of product standards for precast concrete products. For common aspects reference is made to EN 13369:2004: Common rules for pr
24、ecast concrete products, from which also the relevant requirements of the EN 206-1: Concrete Part 1: Specification, performance, production and conformity are taken. The references to EN 13369:2004 by CEN/TC 229 product standards are intended to make them homogeneous and to avoid repetitions of simi
25、lar requirements. Eurocodes are taken as a common reference for design aspects. The installation of some structural precast concrete products is dealt with by ENV 13670-1: Execution of concrete structures Part 1: Common rules, which has at the moment the status of a European Prestandard. In all coun
26、tries it can be accompanied by alternatives for national application and it should not be treated as a European Standard. The programme of standards for structural precast concrete products comprises the following standards, in some cases consisting of several parts : EN 1168, Precast concrete produ
27、cts Hollow core slabs. EN 12794, Precast concrete products Foundation piles. EN 12843, Precast concrete products Masts and poles. EN 13224, Precast concrete products Ribbed floor elements. EN 13225, Precast concrete products Linear structural elements. EN 13693, Precast concrete products Special roo
28、f elements. EN 13747, Precast concrete products Floor plates for floor systems. EN 13978, Precast concrete products Precast concrete garages. EN 14843, Precast concrete products Stairs. EN 14844, Precast concrete products Box culverts. EN 14843:2007(E) 5 EN 14991, Precast concrete products Foundatio
29、n elements. EN 14992, Precast concrete products Wall elements. prEN 15037, Precast concrete products - Beam-and-block floor systems. EN 15050, Precast concrete products Bridge elements. prEN 15258, Precast concrete products Retaining wall elements. This standard defines in Annex ZA the application m
30、ethods of CE marking to products designed using the relevant EN Eurocodes (EN 1992-1-1 and EN 1992-1-2). Where, in default of applicability conditions of EN Eurocodes to the works of destination, design Provisions other than EN Eurocodes are used for mechanical strength and/or fire resistance, the c
31、onditions to affix CE marking to the product are described in ZA.3.4. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia
32、, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EN 14843:2007(E) 6 Introduction The evaluation of conformity given in this st
33、andard refers to precast concrete elements which are supplied to the market and covers all the production operations carried out in the factory. The documentation accompanying a manufactured component will refer to the clauses of this standard with which it complies. EN 14843:2007(E) 7 1 Scope This
34、standard gives specifications for materials, production, properties, requirements and methods of testing for precast concrete monolithic stairs, and for precast concrete elements (e.g. individual steps) used to make reinforced and/or prestressed concrete stairs. This standard is applicable to struct
35、ural stairs for indoor or outdoor use. This standard covers precast concrete stairs and associated landings of monolithic design or constructed from individual steps supported by beams or columns. Supporting elements may include in situ concrete. This standard covers terminology, performance criteri
36、a, verification methods, tolerances, relevant physical properties, special test methods and specific aspects of transport, erection and connection. Geometrical properties related to functionality of stairs are not covered by this standard and can be found in National regulations or local practice. P
37、recast concrete stairs are classified into two main product families : monolithic stairs constructed from precast concrete components consisting of flights, landings or a combination of these. They may include vertical supporting elements ; stairs constructed from individual steps, whether load bear
38、ing or not, assembled on site with, for example, carriages or a central column. Their shape may be straight or winding. Stairs may incorporate parapets (on one or both sides) and landings. Stairs may have simple bearings (e.g. on corbels, walls or beams), bolted connections or they may be connected
39、with reinforcement and in situ concrete. The surfaces of the precast elements may be exposed or covered by finishes. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated ref
40、erences, the latest edition of the referenced document (including any amendments) applies. EN 1992-1-1:2004, Eurocode 2: Design of concrete structures Part 1-1: General rules and rules for buildings EN 13369: 2004, Common rules for precast concrete products EN 14843:2007(E) 8 3 Terms and definitions
41、 3.1 General Subclauses 3.1 and J.4 of EN 13369:2004 shall apply. Terms and definitions for stairs are given in Annex A (informative). 4 Requirements 4.1 Material requirements Subclause 4.1 of EN 13369:2004 shall apply. 4.2 Production requirements Subclause 4.2 of EN 13369:2004 shall apply. The conc
42、rete shall have a minimum class of C30/37 for reinforced or prestressed concrete stairs. 4.3 Finished product requirements 4.3.1 Geometrical properties 4.3.1.1 Production tolerances Unless stricter tolerances are given in the project specification, subclause 4.3.1.1 of EN 13369:2004 shall apply exce
43、pt for the amendments given in Table 1 below. Table 1 Amendment to EN 13369:2004, Table 4 Permitted deviations of cross-sections for structural elements Target dimension of the cross-section in the direction to be checked La(mm) cb(mm) L 150 mm + 10 - 5 5 L 400 mm 15 + 15 - 10 Linear interpolation f
44、or Intermediate values. aThe difference between two consecutive rises shall not exceed 6 mm.bThe minimum concrete cover defined in 4.3.7 shall take into account the depth of any concrete removed by a finishing process. The positioning of reinforcement shall ensure that the minimum cover defined in 4
45、.3.7 is achieved. NOTE 1 L and the positive values for c (upper permitted deviation) are given to ensure that deviations in cross-sectional dimensions and in the position of the reinforcement do not exceed values covered by the relevant safety factors in the Eurocodes. NOTE 2 The negative values for
46、 c (lower permitted deviation) are given for durability purposes. EN 14843:2007(E) 9 4.3.1.2 Minimum nominal dimensions The minimum nominal dimensions of Table 2 shall apply. Table 2 Minimum nominal dimensions (mm) Dimension Minimum dimension Thickness of a step or landing 45 Thickness of a wall 80
47、Thickness of a parapet 60 Wall thickness of a hollow element45 Plan dimensions of a column 120 In case of 45 mm of thickness, special care shall be paid to the correct positioning of reinforcement. 4.3.2 Surface characteristics Subclause 4.3.2 of EN 13369:2004 shall apply. The tolerances for surface
48、 characteristics listed in Table 3 shall be permitted for precast concrete stair components. Table 3 Permitted deviations for surface characteristics (sizes in mm) L = length of the reference rulerad = d1 d2d (2 + L / 500) aSee 5.2 NOTE A client may inform the producer that specific surfaces are int
49、ended to be finished with paint or a thin coating. 4.3.3 Mechanical resistance 4.3.3.1 General Subclause 4.3.3.1 of EN 13369:2004 shall apply. 4.3.3.2 Verification by calculation Subclause 4.3.3.2 of EN 13369:2004 shall apply. Both static and dynamic loading should be considered. NOTE 1 For steps less than 80 mm thick or independent steps, the dynamic coefficient may be defined in National regulations or other rules valid in the place of use of the product. NOTE 2 For accidental actions and robustness requirements se
