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NA to BS EN 1993 2 2006 UK National Annex to Eurocode 3 Design of structures – Part 2 Steel bridges ICS 91 010 30; 91 080 10; 93 040 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT[.]
Licensed Copy: Miss Lucie Carter, British Standards Institution, 15/02/2012 12:20, Uncontrolled Copy, (c) The British Standards Institution 2012 NA to BS EN 1993-2:2006 NA+A1:2012 NATIONAL ANNEX UK National Annex to Eurocode 3: Design Design of of steel structures – structures – Part 2: Steel bridges ICS 91.010.30; 91.080.10; 93.040 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Licensed LicensedCopy: Copy:Miss MissLucie LucieCarter, Carter,British BritishStandards StandardsInstitution, Institution,15/02/2012 15/02/201212:20, 12:20,Uncontrolled UncontrolledCopy, Copy,(c)(c)The TheBritish BritishStandards StandardsInstitution Institution2012 2012 NA+A1:2012 to BS EN 1993-2:2006 NA to BS EN 1993-2:2006 NA to BS EN 1993-2:2006 Publishing and copyright information Publishing and copyright information The BSI copyright notice displayed in this document indicates when the The BSI copyright notice displayed in this document indicates when the document was last issued document was last issued © The British Standards Institution 2012 © BSI 2008 © BSI 2008by BSI Standards Limited 2012 Published ISBN 978 580 54975 ISBN978 978 00 580 580 54975 78489 ISBN The following BSI references relate to the work on this standard: The following BSI references relate to the work on this standard: Committee reference B/525/10 Committee reference B/525/10 DC 07/30128148 Draft for comment Draft for for comment comment 07/30128148 07/30128148 DC, DC 12/30260810 DC Draft Publication history Publication history First published May 2008 First published May 2008 Amendments issued since publication Amendments issued since publication Amd no Amd no Date Date Text affected Text affected A1 31 July 2012 See Introduction Licensed Copy: Miss Lucie Carter, British Standards Institution, 15/02/2012 12:20, Uncontrolled Copy, (c) The British Standards Institution 2012 NA+A1:2012NA to to BS BSEN EN1993-2:2006 1993-2:2006 Contents Introduction NA.1 NA.2 NA.3 NA.4 Scope Nationally Determined Parameters Decision on the status of the informative annexes References to non-contradictory complementary information 11 10 Bibliography 12 List of tables Table NA.1 – Additional sacrificial thickness Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages to 12, an inside back cover and a back cover © BSI2012 2008 ã ã ii â The British Standards Institution Licensed Copy: Miss Lucie Carter, British Standards Institution, 15/02/2012 12:20, Uncontrolled Copy, (c) The British Standards Institution 2012 NA+A1:2012 to BS EN 1993-2:2006 NA to BS EN 1993-2:2006 ii ii •• © © BSI The2008 British Standards Institution 2012 This page deliberately left blank Licensed Copy: Miss Licensed LucieCopy: Carter, Miss British Lucie Standards Carter, British Institution, Standards 15/02/2012 Institution, 12:20, 15/02/2012 Uncontrolled 12:20, Copy, Uncontrolled (c) The British Copy, Standards (c) The British Institution Standards 2012 Institution 2012 NA+A1:2012NA to to BS BSEN EN1993-2:2006 1993-2:2006 National Annex (informative) to BS EN 1993-2:2006, Eurocode – Design of steel NA to BS EN 1993-2:2006 structures – Part 2: Steel bridges National Annex (informative) to Introduction BS EN 1993-2:2006, Eurocode –by Design of steel This National NationalAnnex Annexhas is published BSI Standards Limited,B/525/10, under This been prepared by BSI Subcommittee structures – PartBridges, 2: Steel bridges licence from The British Standards Institution Thisuse National Annex in consultation with B/525/31, Structural of steel has been prepared by BSI Subcommittee B/525/10, Bridges, in consultation with B/525/31, Structural use of steel The start and finish of text introduced or altered by National NA.1 Introduction Scope Amendment No.1 is indicated in the text by tags and Minor This National Annex Annex has gives: This National been prepared by BSI Subcommittee B/525/10, editorial changes are not tagged Bridges, in decisions consultation B/525/31,Determined Structural use of steel a) the UK for with the Nationally Parameters National Amendment A1 has introduced changes to NA.2.7 and NA.3 described in the following subclauses of BS EN 1993-2:2006: • 2.1.3.2(1) NA.1 Scope • 8.2.1.6(1) • 2.1.3.3(5) • 8.2.10(1) This National Annex gives: • 2.1.3.4(1) • 8.2.13(1) a) the UK decisions for the Nationally Determined Parameters • 2.1.3.4(2) • 8.2.14(1) described in the following subclauses of BS EN 1993-2:2006: • 2.3.1(1) (two places) • 9.1.2(1) • 2.1.3.2(1) • 8.2.1.6(1) • 2.1.3.2(1) • 8.2.1.6(1) • 3.2.3(2) • 9.1.3(1) • 2.1.3.3(5) • 8.2.10(1) • 2.1.3.3(5) • 8.2.10(1) • 3.2.3(3) • 9.3(1)P • 2.1.3.4(1) • 8.2.13(1) • 2.1.3.4(1) • 8.2.13(1) • 3.2.4(1) • 9.3(2)P • 2.1.3.4(2) • 8.2.14(1) • 2.1.3.4(2) • 8.2.14(1) • 3.4(1) (two places) • 9.4.1(6) • 2.3.1(1) • 9.1.2(1) • 2.3.1(1) (two places) • 9.1.2(1) • 3.2.3(2) • 9.1.3(1) • 3.5(1) • 9.5.2(2) • 3.2.3(2) • 9.1.3(1) • 3.2.3(3) • 9.3(1)P • 3.6(1) • 9.5.2(3) • 3.2.3(3) • 9.3(1)P • 3.2.4(1) • 9.3(2)P • 3.6(2) • 9.5.2(5) • 3.4(1) • 9.4.1(6) • 3.2.4(1) • 9.3(2)P • 4(1) • 9.5.2(6) • 3.5(1) • 9.5.2(2) • 3.4(1) • 9.4.1(6) • 4(4) • 9.5.2(7) • 3.6(1) • 9.5.2(3) • 3.5(1) • 9.5.2(2) • 5.2.1(4) • 9.5.3(2) (two places) • 3.6(2) • 9.5.2(5) • 3.6(1) • 9.5.2(3) • 5.4.1(1) • 9.6(1) (two places) • 4(1) • 9.5.2(6) • 3.6(2) • 9.5.2(5) • 4(4) • 9.5.2(7) • 6.1(1)P • 9.7(1) • 4(1) • 9.5.2(6)(two places) • 5.2.1(4) • 9.5.3(2) • 6.2.2.3(1) • A.3.3(1)P • 4(4) • 9.5.2(7) • 5.4.1(1) • 9.6(1) (two places) • 6.2.2.5(1) • A.3.6(2) • 5.2.1(4) • 9.5.3(2) (two places) • 6.1(1)P • 9.7(1) • 6.3.2.3(1) • A.4.2.1(2) • 6.2.2.3(1) • A.3.3(1)P • 5.4.1(1) • 9.6(1) (two places) • 6.3.4.2(1) • A.4.2.1(3) • 6.2.2.5(1) • A.3.6(2) • 6.1(1)P • 9.7(1) • 6.3.4.2(7) • A.4.2.1(4) • 6.3.2.3(1) • A.4.2.1(2) • 6.2.2.3(1) • A.3.3(1)P • 7.1(3) • A.4.2.4(2) • 6.3.4.2(1) • A.4.2.1(3) • 6.2.2.5(1) • A.3.6(2) • 6.3.4.2(7) • A.4.2.1(4) • 7.3(1) • C.1.1(2) • 6.3.2.3(1) • A.4.2.1(2) • 7.1(3) • A.4.2.4(2) • 8.1.3.2.1(1) • C.1.2.2(1) • 6.3.4.2(1) • A.4.2.1(3) • 7.3(1) • C.1.1(2) • 8.1.6.3(1) • C.1.2.2(2) • 6.3.4.2(7) • A.4.2.1(4) • 8.1.3.2.1(1) • C.1.2.2(1) • 8.2.1.4(1) • E.2(1) • 8.1.6.3(1) • C.1.2.2(2) • 7.1(3) • A.4.2.4(2) • 8.2.1.5(1) • 8.2.1.4(1) • E.2(1) • 7.3(1) • C.1.1(2) • 8.2.1.5(1) • 8.1.3.2.1(1) • C.1.2.2(1) • 8.1.6.3(1) • 8.2.1.4(1) • 8.2.1.5(1) • C.1.2.2(2) © BSI 2008 • â The British Standards Institution 2012 ã ã E.2(1) Licensed Copy: Miss Lucie Carter, British Standards Institution, 15/02/2012 12:20, Uncontrolled Copy, (c) The British Standards Institution 2012 NA+A1:2012 to BS EN 1993-2:2006 NA to BS EN 1993-2:2006 b) the UK decisions on the status of BS EN 1993-2:2006 informative annexes; and c) references to non-contradictory complementary information NA.2 Nationally Determined Parameters NA.2.1 Design working life [BS EN 1993-2:2006, 2.1.3.2(1)] Unless otherwise specified for a particular project, the design working life should be 120 years NA.2.2 Durability [BS EN 1993-2:2006, 2.1.3.3(5)] Additional requirements for durable details should be specified for a particular project NA.2.3 Robustness and structural integrity [BS EN 1993-2:2006, 2.1.3.4(1)] Components which need to be designed for accidental design situations should be specified for a particular project NA.2.4 Robustness and structural integrity [BS EN 1993-2:2006, 2.1.3.4(2)] The safe life design method of fatigue assessment should be used unless specified otherwise for a particular project NA.2.5 Actions and environmental influences [BS EN 1993-2:2006, 2.3.1(1)] Actions not included in various parts of BS EN 1991 which need to be considered in the design should be specified for a particular project Transient situations for maintenance and repair which need to be considered should be specified for a particular project NA.2.6 Fracture toughness [BS EN 1993-2:2006, 3.2.3(2)] The example in Table 3.1 should not be used and NA to BS EN 1993-1-10:2005, NA.2.1, should be followed NA.2.7 Fracture toughness [BS EN 1993-2:2006, 3.2.3(3)] For components in compression, the values for σ 0,25fy(t) should For components in compression, the value given Ed of in σ be used for all magnitudes of NA to BS EN 1993-1-10 should Ed be used NOTE Complementary guidance is given in PD 6695-1-10. 2 •• © © BSI The2008 British Standards Institution 2012 Licensed Copy: Miss Lucie Carter, British Standards Institution, 15/02/2012 12:20, Uncontrolled Copy, (c) The British Standards Institution 2012 NA+A1:2012NA to to BS BSEN EN1993-2:2006 1993-2:2006 NA.2.8 Through thickness properties [BS EN 1993-2:2006, 3.2.4(1)] The recommendations in Table 3.2 should not be used and NA to BS EN 1993-1-10:2005, NA.2.2, should be followed NA.2.9 Cables and other tension elements [BS EN 1993-2:2006, 3.4(1)] The types of cable which are deemed to satisfy the requirements for durability should be specified for a particular project NA.2.10 Bearings [BS EN 1993-2:2006, 3.5(1)] The types of bearing which may be used should be specified for a particular project NA.2.11 Other bridge components [BS EN 1993-2:2006, 3.6(1)] The types of expansion joint, guardrail, parapet and other ancillary items which may be used should be specified for a particular project NA.2.12 Other bridge components [BS EN 1993-2:2006, 3.6(2)] The bridge deck surfacing systems, the products used and the methods of application should be specified for a particular project NA.2.13 Durability [BS EN 1993-2:2006, 4(1)] The access requirements for inspection and maintenance should be specified for a particular project Box sections that are provided with maintenance access systems should be designed such that no large accumulation of moisture can occur internally and air quality is maintained NA.2.14 Durability [BS EN 1993-2:2006, 4(4)] For surfaces that cannot be inspected, the following design considerations should be addressed and appropriate measures taken or allowances made a) Sealing against corrosion It is difficult to effectively seal the internal void of fabricated box girder constructions, even when using continuous welding, so this approach to corrosion control is not recommended Instead, fabricated box girders should be detailed to allow free drainage of any condensing water at the lowest point, and a sacrificial thickness of steel should be added that is appropriate for a C2 type environment, as described in item c) â BSI2012 2008 ã ã © The British Standards Institution Licensed Copy: Miss Lucie Carter, British Standards Institution, 15/02/2012 12:20, Uncontrolled Copy, (c) The British Standards Institution 2012 NA+A1:2012 to BS EN 1993-2:2006 NA to BS EN 1993-2:2006 Drain holes should be sufficiently large that they not become blocked, but not so large as to allow wildlife to enter Drainage tubes of a non-corroding material should be used and should be arranged to ensure that any water containing corrosion products is diverted away from external surfaces that could easily be stained For structural hollow sections, the internal void should either be effectively sealed to prevent the ingress of air, moisture and contaminants, or alternatively the approach for fabricated box girders described earlier may be followed Where structural hollow sections are to be sealed, they should be checked for structural adequacy under differential pressures between the internal and external atmospheres Sealed structural hollow sections should be no less than mm thick Where the design life is less than 50 years this value may be reduced to mm Narrow gaps ( 40 mm and < 70 mm The thickness may be reduced by mm for lanes occupied by light vehicles â BSI2012 2008 ã ã â The British Standards Institution Licensed Copy: Miss Lucie Carter, British Standards Institution, 15/02/2012 12:20, Uncontrolled Copy, (c) The British Standards Institution 2012 NA+A1:2012 to BS EN 1993-2:2006 NA to BS EN 1993-2:2006 b) Spacing of the supports of the deck plate by webs of stiffeners in the carriageway: e u 380 mm Locally, e may be increased by 5% where required, e.g for adaptation to bridge curvature in plan c) Deck plate thickness for foot bridges and footpaths which can carry maintenance vehicles: t W 10mm and e/t u 50; e u 750 mm d) Deck plate thickness for foot bridges and footpaths with no maintenance vehicles: t W mm and e/t u 92; e u 900 mm e) Thickness of stiffener: t W mm NA.2.54 Thickness of deck plates and minimum stiffness of stiffeners [BS EN 1993-2:2006, C.1.2.2(2)] No additional information NA.2.55 Combination factor [BS EN 1993-2:2006, E.2(1)] Account should not be taken of the weight distribution of several lorries and the combination factor ψ should be taken as 1,0 NA.3 Decision on the status of the informative annexes NA.3.1 NA.3.1 NA.3.2 NA.3.2 Annex C Recommendations for thefor structural A – Technical specifications bearings detailing steel bridge decks Annex A may of be used Annex C may be used Annex B – Technical specifications for expansion Annex D –road Buckling lengths of members in joints for bridges bridges and assumptions for geometrical Annex B may be used imperfections NA.3.3 Annex Annex C be – Recommendations for the D may used structural detailing of steel bridge decks NA.3.3 Annex E –beCombination effects from local Annex C may used subject to theof following: wheel and tyre loads and from global traffic • all detailing and dimensions should be verified against the limit loads road bridges stateon requirements of BS EN 1993-2; • all Etolerances specified for execution should be verified against Annex may be used BS EN 1090-2, see also NA.4 10 ã â 10 ã â BSI The2008 British Standards Institution 2012 iss Lucie Carter, British Standards Institution, 15/02/2012 12:20, Uncontrolled Copy, (c) The British Standards Institution 2012 NA+A1:2012 to BS EN 1993-2:2006 NA.3.4 Annex D – Buckling lengths for members in bridges and assumptions for geometrical imperfections Annex D may be used NA.3.5 Annex E – Combination of effects from local wheel and tyre loads and from global traffic loads on road bridges Annex E may be used. NA to BS EN 1993-2:2006 NA.4 References to non-contradictory complementary information PD 6695-2, Recommendations for the design of bridges to PD 6695-1-10, Recommendations for the design of structures BS EN 1993 1) to BS EN 1993-1-10 PD 6695-2, Recommendations for the design of bridges to BS EN 1993 PD 6705-2, Structural use of steel and aluminium – Part 2: Recommendations for the execution of steel bridges to BS EN 1090-2 â The British Standards Institution 2012 ã 11 Licensed Copy: Miss Lucie Carter, British Standards Institution, 15/02/2012 12:20, Uncontrolled Copy, (c) The British Standards Institution 2012 NA+A1:2012 to BS EN 1993-2:2006 NA to BS EN 1993-2:2006 Bibliography For dated references, only the edition cited applies For undated references, the latest edition of the referenced document (including any amendments) applies BS EN 1993-1-9, Eurocode 3: Design of steel structures – Part 1-9: Fatigue BS EN ISO 12944-2, Paints and varnishes – Corrosion protection of steel structures by protective paint systems – Part 2: Classification of environments ISO 9223, Corrosion of metals and alloys – Corrosivity of atmospheres – Classification NA to BS EN 1991-2, Eurocode 1: Actions on structures – Part 2: Traffic loads on bridges NA to BS EN 1991-1-7:2006, Eurocode 1: Actions on structures – Part 1-7: General actions – Accidental actions 2) NA to BS EN 1993-1-5:2006, UK National Annex to Eurocode 3: Design of steel structures – Part 1-5: Plated structural elements NA to BS EN 1993-1-9:2005, UK National Annex to Eurocode 3: Design of steel structures – Part 1-9: Fatigue 2) NA to BS EN 1993-1-10:2005, Eurocode 3: Design of steel structures – Part 1-10: Material toughness and through-thickness properties 2) PD 6695-2, Recommendations for the design of design bridgesoftostructures BS EN 1993 2) PD 6695-1-10, Recommendations for the to BS EN 1993-1-10 PD 6695-2, Recommendations for the design of bridges to BS EN 1993 PD 6705-2, Structural use of steel and aluminium – Part 2: Recommendations for the execution of steel bridges to BS EN 1090-2 2) In preparation 12 ã â 12 ã â BSI The2008 British Standards Institution 2012 Licensed Copy: Miss Lucie Carter, British Standards Institution, 15/02/2012 12:20, Uncontrolled Copy, (c) The British Standards Institution 2012 NA+A1:2012NA to to BS BSEN EN1993-2:2006 1993-2:2006 This page deliberately â The British Standards Institution 2012left ãblank 13 British Standards Institution (BSI) BSI is the independent national body responsible for preparing British Standards and other standards-related publications, information and services It presents the UK view on standards in Europe and at the international level BSI is incorporated by Royal Charter British Standards and other standardization products are published by BSI Standards Limited Revisions Information on standards British Standards and PASs are periodically updated by amendment or revision Users of British Standards and PASs should make sure that they 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