BS-EN-12812-2004.pdf
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1、BRITISH STANDARD BS EN 12812:2004 Falsework Performance requirements and general design The European Standard EN 12812:2004 has the status of a British Standard ICS 91 220 ? Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 09:37:58 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 12812:2004 Th
2、is British Standard was published under the authority of the Standards Policy and Strategy Committee on 10 December 2004 BSI 10 December 2004 ISBN 0 580 44834 7 National foreword This British Standard is the official English language version of EN 12812:2004. The UK participation in its preparation
3、was entrusted by Technical Committee B/514, Access and support equipment, to Subcommittee B/514/26, Falsework, which has the responsibility to: A list of organizations represented on this subcommittee can be obtained on request to its secretary. Additional information BS EN 12812:2004 specifies perf
4、ormance requirements for the design of falsework in accordance with one of three classes: A, B1 and B2. Limit state design methods are specified for design classes B1 and B2. It does not provide guidance for the structural design of Class A. BS EN 12812:2004 does not provide guidance on procedures n
5、ecessary for the successful management of work on site. The recommendations of the Advisory Committee on Falsework (the “Bragg Report”1 21) in respect of the falsework coordinator have not been included in it. BS 5975:1996 exists in parallel with this standard and provides recommendations on the des
6、ign of falsework using permissible stress methods and on procedures for the successful management of work on site, including the appointment of a falsework coordinator. The procedural recommendations are re-affirmed by Technical Committee B/514. With reference to the NOTE to 5.2.1, there are no furt
7、her requirements to 5.2.1. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them i
8、n the UK. 1)1 BRAGG, S.L. (DEPARTMENT OF EMPLOYMENT, DEPARTMENT OF THE ENVIRONMENT). Interim Report of the Advisory Committee on Falsework, London, HMSO, 1974. 2 BRAGG, S.L. (DEPARTMENT OF EMPLOYMENT, DEPARTMENT OF THE ENVIRONMENT). Final Report of the Advisory Committee on Falsework, London, HMSO,
9、1975. Amendments issued since publication Amd. No. DateComments Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 09:37:58 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 12812:2004 BSI 10 December 2004 i Textual errors The textual errors set out below were discovered when the English language
10、 version of EN 12812 was adopted as the national standard. They have been reported to DIN in a proposal to amend the text of the European standard. 7.2.2 Steel scaffold tubes “4.2.2.1” should be amended to “4.2.1.3”. 7.6 Towers providing support The sentence in bold in Clause 8 (“The cross-sectional
11、 shape of a support structure shall be maintained at the top and bottom, e.g. by bracing or stiffened planes.”) should be moved to 7.6 and be put in regular typeface. 8 The cross-sectional shape of a support structure shall be maintained at the top and bottom, e.g. by bracing or stiffened planes.Act
12、ions The sentence “8 The cross-sectional shape of a support structure shall be maintained at the top and bottom, e.g. by bracing or stiffened planes. Actions” should be amended to read: “8 Actions” 8.2.5.2 Debris effect “Fw,2,d” should be amended to “Fw”. 8.2.6 Seismic effects “8.2.6 Seismic effects
13、” should be amended to “8.2.6 Seismic effects Q7” 8.3 Indirect actions Q7 “Q7” should be amended to “Q8”. Table 1 Load combinations Line 8: “Q6” should be amended to “Q5”. Line 9: “Q7” should be amended to “Q6”. Line 10: “Q7” should be inserted in the first column to the left-hand side of “Seismic”
14、and a horizontal line should be inserted between the new “Q6” and “Q7” in the table. NOTE to Figure 5 Examples for calculation of imperfections of joints “See 9.3.2.1 to 9.3.2.3 for symbol definitions” should be amended to “See 9.3.2.1 and 9.3.2.2 for symbol definitions”. 9.4.2.4.1 Shear stiffness o
15、f bracing with tube and couplers Line 3: “Figure 11” should be amended to “Figure 12”. Equation (22) Change “b” to “nb”. Figure 11 b) Theoretical brace Both the “” should be amended to “i”. Figure 12 Explanation of symbols for calculation of tube and fitting frame stiffness In the right hand figure,
16、 “T1” should be amended to “Si”. NOTE to Figure 12 Explanation of symbols for calculation of tube and fitting frame stiffness “NOTE” should be amended to “NOTE 1”. A second note should be added as follows: “NOTE 2In this example all bays have the same height.” (This note has been moved from 9.4.2.4.
17、2.) Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 09:37:58 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 12812:2004 ii BSI 10 December 2004 Equation (23) “l” should be amended to “li”. Figure 13 Explanation of symbols for calculation of timber frames NOTE below the figure title: The note
18、 “NOTEIn this example all bays have the same height” should be deleted. Table 3 Displacement moduli for timber connections In the definition in the line above the NOTE, “d2” should be amended to “d”. 9.4.2.5.1 Stiffening of free-standing lattice towers Line 4: “Figure 11b)” should be amended to “Fig
19、ure 12”. Line 13: “Hd,i” should be amended to “Hd”. Line 16: “” should be amended to “2”. 9.4.2.5.2 Stiffening of truss beams Line 2: “CT4” should be amended to “Si”. Annex B Friction coefficients “Annex B (informative)” should be inserted after Annex A, e) and the heading “Friction coefficients” sh
20、ould be centred underneath this heading and its type size increased to the same size. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Corre
21、spondence 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 application. Compliance with a British Standard does not
22、of itself confer immunity from legal obligations. Attention is drawn to the following statutory regulation: The Construction (Design and Management) Regulations 1994. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the EN title page, pages 2 to 49 and a
23、 back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 09:37:58 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12812 June 2004 ICS 91.220 Eng
24、lish version Falsework - Performance requirements and general design Etaiements - Exigences de performance et mthodes de conception et calculs Traggerste - Anforderungen, Bemessung und Entwurf This European Standard was approved by CEN on 10 December 2003. CEN members are bound to comply with the CE
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