BS EN 771-4-2003 砌块规范 第4部分 热处理过的加气混凝土砌块.pdf
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1、BRITISH STANDARD BS EN 771-4:2003 Incorporating Amendment No. 1 Specification for masonry units Part 4: Autoclaved aerated concrete masonry units The European Standard EN 771-4:2003, with the incorporation of ICS 91.100.30 ? amendment A1:2005, has the status of a British Standard BS EN 771-4:2003 pu
2、blished under the authority of the Standards Policy and Strategy Committee ? on 30 October 2003 BSI 30 November 2005 ISBN 0 580 42782 X National foreword This British Standard is the official English language version of ? EN 771-4:2003, including amendment A1:2005. It supersedes ? BS EN 771-4:2001 w
3、hich is withdrawn. The start and finish of text introduced or altered by CEN amendment is indicated in the text by tags ? . Tags indicating changes to CEN text carry the number of the CEN amendment. For example, text altered by CEN amendment A1 is indicated by ?. EN 771-4:2003 is a candidate “harmon
4、ized” European Standard and fully takes into account the requirements of the European Commission mandate M116, Masonry and related products, given under the EU Construction Products Directive (89/106/EEC), and is intended to lead to CE marking. The date of applicability of EN 771-4:2003 as a “harmon
5、ized” European Standard, i.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 “harmonize
6、d” European Standards and their 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 pe
7、riod, usually of 12 months, for the implementation of CE marking. At the end of this co-existence period, the national standard(s) will be withdrawn. EN 771-4:2003 is the subject of transitional arrangements agreed under the Commission mandate. In the UK, the corresponding national standard is: BS 6
8、073-1:1981, Precast concrete masonry units Part 1: Specification for precast concrete masonry units; and based on this transition period of twenty-one months, the above mentioned national standards will be withdrawn in April 2006. NOTEThis date is approximate. Users of this standard should contact B
9、SI Customer Services for confirmation of withdrawal. The UK participation in its preparation was entrusted by Technical Committee B/519, Masonry and associated testing, to Subcommittee B/519/1, Masonry units, which has the responsibility to: aid enquirers to understand the text; present to the respo
10、nsible international/European committee any enquiries on the interpretation, or proposals for change, and keep? UK interests informed; monitor related international and European developments and promulgate them in the UK. Amendments issued since publication Amd. No. DateComments 1600021 November 200
11、5 Incorporation of CEN amendment A1:2005 and revision of national annex NA and national foreword This British Standard was BS EN 771-4:2003 i A list of organizations represented on this subcommittee can be obtained on request to its secretary. EN 771-4 specifies the characteristics and performance r
12、equirements for autoclaved aerated concrete masonry units available throughout the CEN member countries. It aims to do so in product performance terms, avoiding as far as possible prescriptive requirements and all the traditional designations of autoclaved aerated concrete units available throughout
13、 Europe. Current products, however, will continue to be manufactured, traded and used, even though they are not referred to by name in this European Standard. The concept of the declared value has been introduced and is the value for the various properties referred to in this standard that the manuf
14、acturer claims for the product. There are other notable differences to which the national annex will refer, in particular the supporting test methods are different and in respect of compressive strength, AAC masonry units are designated either Category 1 or Category 2. The UK National Annex NA attac
15、hed to this standard provides an informative commentary on the differences between EN 771-4 and BS 6073-1. Nothing in this annex should be construed as specifying requirements other than those contained in the normative parts of this European Standard. If CE marking is performed, the procedures in A
16、nnex ZA will apply. The significance of the CE marking is that the product manufacturer claims compliance with the “harmonized” requirements given in the normative text of the product standard. These relate to the essential requirements of the EU Construction Products Directive. Not all product char
17、acteristics need necessarily be given on the CE marking, but those product characteristics covered by regulations in force in each EU Member State, where the manufacturer intends that the product will be used, do need to be stated. It cannot be assumed that the declared value of a performance charac
18、teristic given for a masonry unit conforming to one part of EN 771 can be directly compared with the same performance characteristic for a masonry unit conforming to another part of EN 771. Cross-references The British Standards which implement international or European publications referred to in t
19、his document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a c
20、ontract. Users are responsible for its 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, the EN title page, pages 2 to 35 and a back cover.
21、The BSI copyright notice displayed in this document indicates when the document was last issued. BSI 30 November 2005 ii ? EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 771-4 ICS 91.100.30Supersedes EN 771-4:2000 English version Specification for masonry units - Part 4: Autoclaved aerated con
22、crete masonry units Spcifications pour lments de maonnerie - Partie 4: Elments de maonnerie en bton cellulaire autoclave Festlegungen fr Mauersteine - Teil 4: Porenbetonsteine CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this Eur
23、opean Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Management Centre or to any CEN member. This European Standard exists in three official versions (English,
24、 French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the official versions. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES K
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