BS EN 772-20-2000 Methods of test for masonry units - Determination of flatness of faces of masonry units《圬工砌块的试验方法 圬工单位表面平整度的测定 》.pdf

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1、BRITISH STANDARD BS EN 772-20:2000 Incorporating Amendment No. 1 Methods of test for masonry units Part 20: Determination of flatness of faces of masonry units This European Standard EN 772-20:2000, incorporating amendment A1:2005, has the status of a British Standard ICS 91.080.30; 91.100.15 BS EN

2、772-20:2000 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 15 July 2000 BSI 16 January 2006 ISBN 0 580 34980 2 National foreword This British Standard is the official English language version of EN 772-20:2000, including amendment A1:2005, w

3、hich is included in a package of new European Standards being prepared by CEN/TC 125 relating to aggregate concrete and manufactured stone and natural stone masonry units. No British Standard is superseded. The start and finish of text introduced or altered by CEN amendment is indicated in the text

4、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 !“. The UK participation in its preparation was entrusted by Technical Committee B/519, Masonry and associated tests, to Subcommittee B/519/1, Masonry u

5、nits, which has the responsibility to: A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue un

6、der 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 contract. Users are responsible for its correct ap

7、plication. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep UK interests informed; mon

8、itor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 6, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates whe

9、n the document was last issued. Amendments issued since publication Amd. No. Date Comments 15683 16 January 2006 See national foreword(8523($1 67$1$5 1250( (8523e(11( (8523b,6 amendment A1 was approved by CEN on 29 December 2004. Ref. No. EN 772-20:2000 +A1:2005 ECEN members are bound to comply with

10、 the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European 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

11、or to any CEN member. This European Standard exists in three official versions (English, 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 versi

12、ons. CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switze

13、rland and United Kingdom. (includes amendment A1: 2005) 3DJH (1 b) the name of the organization that carried out the sampling and the method used; c) the date of testing; d) the type, origin and designation of the masonry unit by reference to !the relevant part of EN 771; “ e) the number of specimen

14、s in the sample; f) the date of receipt of the specimens in the testing laboratory; g) !for each surface specified as being plane,“ the length of the individual diagonals of each face and the mean length of the diagonals to the nearest millimetre; !h) for each surface specified as being plane the ma

15、ximum distance from the surface of the masonry unit to the straight edge for each diagonal and the mean deviation to the nearest 0.1 mm; i) for each bed face of units specified as being unsuitable for thin layer masonry the maximum distance from the surface of the masonry unit to the straight edge f

16、or each diagonal. The flatness of the bed faces is taken as the largest individual maximum distance from the sample of units expressed to the nearest 0.1 mm; j) whether the surface of the masonry unit is concave or convex or any other configuration; k) remarks, if any. “ blankBS EN 772-20:2000 BSI 3

17、89 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent national body responsible for preparing British Standards. It presents the UK view on standards in Europe and at the international level. It is incorporated by Royal Charter. Revisions British Standards are

18、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 to improve the quality of our products and services. We would be grateful if anyone finding an inaccuracy or ambiguity while using this Bri

19、tish Standard would inform the Secretary of the technical committee responsible, the identity of which can be found on the inside front cover. Tel: +44 (0)20 8996 9000. Fax: +44 (0)20 8996 7400. BSI offers members an individual updating service called PLUS which ensures that subscribers automaticall

20、y receive the latest editions of standards. Buying standards Orders for all BSI, international and foreign standards publications should be addressed to Customer Services. Tel: +44 (0)20 8996 9001. Fax: +44 (0)20 8996 7001. Email: ordersbsi-. Standards are also available from the BSI website at http

21、:/www.bsi-. 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 national, European and internation

22、al 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: +44 (0)20 8996 7111. Fax: +44 (0)20 8996 7048. Email: infobsi-. Subsc

23、ribing 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: +44 (0)20 8996 7002. Fax: +44 (0)20 8996 7001. Email: membershipbsi-. Informatio

24、n regarding online access to British Standards via British Standards Online can be found at http:/www.bsi- Further information about BSI is available on the BSI website at http:/www.bsi-. Copyright Copyright subsists in all BSI publications. BSI also holds the copyright, in the UK, of the publicatio

25、ns 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, photocopying, recording or otherwise without prior written permissio

26、n 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 implementation then the prior written permission of BSI must be obtained. Details and advice can be obtained from the Copyright & Licensing Manager. Tel: +44 (0)20 8996 7070. Fax: +44 (0)20 8996 7553. Email: copyrightbsi-.

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