BS NA EN 1995 2 UK National Annex to Eurocode 5 Design of timber structures Bridges United Kingdom of Great Britain and Northern Ireland In order to promote public education and public safety, equal j[.]
Un i t e dKi n g d o mo fGr e a t Br i t a i na n dNo r t h e r nI r e l a n d ≠ EDI CTOFGOVERNMENT± I no r d e rt op r o mo t ep u b l i ce d u c a t i o na n dp u b l i cs a f e t y ,e q u a lj u s t i c ef o r a l l ,ab e t t e ri n f o r me dc i t i z e n r y ,t h er u l eo fl a w,wo r l dt r a d ea n dwo r l d p e a c e ,t h i sl e g a ld o c u me n ti sh e r e b yma d ea v a i l a b l eo nan o n c o mme r c i a l b a s i s ,a si ti st h er i g h to fa l lh u ma n st ok n o wa n ds p e a kt h el a wst h a t g o v e r nt h e m BS NA EN 1995-2 (2004) (English): UK National Annex to Eurocode Design of timber structures Bridges Nu l l iv e n d e mu s ,n u l l in e g a b i mu sa u td i f f e r e mu sRe c t u ma u tJu s t i c i a m Wewi l ls e l lt on oma n ,wewi l ln o td e n yo rd e f e rt oa n yma ne i t h e rJu s t i c eo rRi g h t MAGNACARTA( 97 ) NA to BS EN 1995-2:2004 NATIONAL ANNEX UK National Annex to Eurocode 5: Design of timber structures - Part 2: Bridges ICS 91.010.30; 91.080.20; 93.040 British Standards NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BYCOPYRIGHT LAW NA to BS EN 1995-2:2004 Publishing and copyright information The BSI copyright notice displayed in this document indicates when the document was last issued © BSI 2006 ISBN 580 49351 The following BSI references relate to the work on this standard: Committee reference B/525/5 Draft for comment 05/30128368 Publication history First edition, October 2006 Amendments issued since publication Amd no Date Text affected NA to BS EN 1995-2:2004 Contents Introduction NA.l NA.2 NA.3 NA.4 Scope Nationally Determined Parameters Guidance on the use of informative annexes Reference to non-contradictory complementary information Bibliography List of tables Table NA.l - Partial factors 1M for material properties Table NA.2 Limiting values for deflections of beams and trusses Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages to 4, an inside back cover and a back cover â BSI 2006 ã NA to BS EN 1995-2:2004 ii ã â BSI 2006 This page deliberately left blank NA to BS EN 1995-2:2004 National Annex NA (inforlllative) to BS EN 1995-2:2004, Eurocode 5: Design of tilllber structures - Part 2: Bridges Introduction This National Annex has been prepared by BSI Subcommittee B/525/5, Structural use of timber In the UK it is to be used in conjunction with BS EN 1995-2 for the structural design of timber bridges, together with BS EN 1995-1-1, BS EN 1990 and BS EN 1991 and their respective National Annexes NA.l Scope This National Annex gives: a) the UK decisions for the Nationally Determined Parameters described in the following subclauses of BS EN 1995-2:2004: • 2.3.1.2(1) • 2.4.1 7.2 • 7.3.1(2) b) the UK decisions on the status of BS EN 1995-2:2004 informative annexes; c) reference to non-contradictory complementary information NA.2 Nationally Determined Parameters NA.2.1 Assignment of loads to load-duration classes [BS EN 1995-2:2004, 2.3.1.2(1)] Variable actions due to the passage of vehicular and pedestrian traffic should be regarded as short-term actions Actions occurring during erection should be regarded as short-term actions © BSI 2006 • NA to BS EN 1995-2:2004 NA.2.2 Partial factors for material properties [BS EN 1995-2:2004, 2.4.1] BS EN 1995-2:2004, Table 2.1 is implemented nationally by using Table NA.1 Table NA.1 Fundamental combinations Partial factors ni for material properties Solid timber - untreated 1M Solid timber - preservatively treated 1M Glued laminated timber m LVL, plywood, OSB 1M 1M 1M ,v 1M,s 1M,s Connections Shear connectors between timber and concrete in composite members Steel used in composite members Pre-stressing steel elements Concrete used in composite members Fatigue combinations Timber and wood-based materials Connections Shear connectors between timber and concrete in composite members Accidental combinations All materials NA.2.3 = 1,3 = 1,3 1,25 = 1,2 = 1,3 1,25 1,15 1,15 = 1,5 IM,fat = 1,0 IM,fat = 1,0 IM,v,fat = 1,0 m,acc = 1,0 Limiting values for deflections [BS EN 1995-2:2004, 7.2] BS EN 1995-2:2004, Table 7.1 is implemented nationally by using Table NA.2 Table NA.2 Limiting values for deflections of beams and trusses Action Limiting value for deflections in beams and trusses of span, l Characteristic traffic load Pedestrian load and low traffic load NA.2.4 l/200 Damping ratios [BS EN 1995-2:2004, 7.3.1(2)] Where no other values have been verified, the damping ratio (0 should be taken as: t; = 0,010 for structures without mechanical joints; t; = 0,015 for structures with mechanical joints ã â BSI 2006 NA to BS EN 1995-2:2004 NA.3 Guidance on the use of informative annexes NA.3.1 Fatigue verification [BS EN 1995-2:2004, AnnexA] BS EN 1995-2:2004, Annex A may be used NA.3.2 Vibrations caused by pedestrians [BS EN 1995-2:2004, Annex B] BS EN 1995-2:2004, Annex B may be used NA.4 Reference to non-contradictory complementary information Material from BS 5268, Structural use of timber PD 6693, Complementary info'Y'1nation for use with Eurocode 5, BSI, London (Publication date to be announced.) © BSI 2006 • NA to BS EN 1995-2:2004 Bibliography Standards publications For dated references, only the edition cited applies For undated references, the latest edition of the referenced document (including any amendments) applies BS 5268, Structural use of timber PD 6693, Complementary injO'Y'rnationfor use with Eurocode BS EN 1990:2002, Eurocode - Basis of structural design BS EN 1991 (all parts), Eurocode -Actions on structures BS EN 1995-1-1:2004, Eurocode -Design of timber structuresPart 1-1: General Common rules and rules for buildings ã â BSI 2006 NA to BS EN 1995-2:2004 Th:is page deliber-ately left blank NA to BS EN 1995-2:2004 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 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 British 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)208996 7400 BSI offers members an individual updating service called PLUS which ensures that subscribers automatically 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: orders@bsi-global.com Standards are also available from the BSI website at http://www.bsi-global.com 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 international 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: info@bsi-global.com Subscribing 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)208996 7002 Fax: +44 (0)20 8996 7001 Email: membership@bsi-global.com Infonnation regarding online access to British Standards via British Standards Online can be found at http://www.bsi-global.com/bsonline Further information about BSI is available on the BSI website at http://www.bsi-global.com Copyright - liliiii" _ • - Copyright subsists in all BSI publications BSI also holds the copyright, in the UK, of the publications 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 permission from BSI British Standards 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 389 Chiswick High Road London W44AL Details and advice can be obtained from the Copyright & Licensing Manager Tel: +44 (0)20 8996 7070 Fax: +44 (0)208996 7553 Email: copyright@bsi-global.com