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  • BCSA Publication No. 55/13 BCSA Publication No. 55/13

    HANDBOOK OFSTRUCTURAL STEELWORK

    EUROCODE EDITION

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    55/1

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  • HANDBOOK OFSTRUCTURAL STEELWORK

    EUROCODE EDITION

    First text page_Layout 1 04/10/2013 14:26 Page 1

  • THE BRITISH CONSTRUCTIONAL STEELWORK ASSOICIATION LIMITED

    BCSA Limited is the national organisation for the Steel Construction Industry; its Member companies undertake the design,fabrication and erection of steelwork for all forms of construction in building and civil engineering. Associate Members arethose principal companies involved in the direct supply to all or some Members of components, materials or products.Corporate Members are clients, professional offices, educational establishments etc, which support the development ofnational specifications, quality and erection techniques, overall industry efficiency and good practice.

    The principal objectives of the Association are to promote the use of structural steelwork, to assist specifiers and clients, to ensure that the capacities and activities of the industry are widely understood and to provide members with professionalservices in technical, commercial, contractual, certification and health and safety matters. The Associations aim is toinfluence the trading environment in which member companies have to operate in order to improve their profitability.

    The British Constructional Steelwork Association Ltd.4 Whitehall Court, London, SW1A 2ES.Telephone: +44 (0) 20 7839 8566 Fax: +44 (0) 20 7976 1634Email: postroom@steelconstruction.org

    Website: www.steelconstruction.orgwww.steelconstruction.info

    THE STEEL CONSTUCTION INSTITUTE

    SCI (The Steel Construction Institute) is the leading independent provider of technical expertise and disseminator of bestpractice to the steel construction sector. We work in partnership with clients, members and industry peers to help buildbusinesses and provide competitive advantage through the commercial application of our knowledge. We are committed tooffering and promoting sustainable and environmentally responsible solutions.

    The Steel Construction Institute, Silwood Park, Ascot, Berkshire, SL5 7QN.Telephone: +44 (0) 1344 636525 Fax: +44 (0) 1344 636570Email: reception@steel-sci.com

    Website: www.steel-sci.org

    The European operations of Tata Steel comprise Europe's second largest steel producer. With main steelmaking operations inthe UK and the Netherlands, they supply steel and related services to the construction, automotive, packaging, lifting &excavating, energy & power, and other demanding markets worldwide. Tata Steel is one of the worlds top ten steelproducers. The combined group has an aggregate crude steel capacity of more than 28 million tonnes and approximately80,000 employees across four continents.

    Tata Steel, PO Box 1, Scunthorpe, North Lincolnshire, DN16 1BPTelephone: +44 (0) 1724 404040Email: construction@tatasteel.com

    Website: www.tatasteeleurope.com

    First text page_Layout 1 04/10/2013 14:26 Page 2

  • Publication No. 55/1

    HANDBOOK OFSTRUCTURAL STEELWORK (EUROCODE EDITION)

    Jointly published by

    The British Constructional The Steel Construction Institute Steelwork Association Ltd Silwood Park 4 Whitehall Court Ascot London SW1A 2ES SL5 7QN

    Tel: +44 (0) 20 7839 8566 Tel: +44 (0) 1344 636525 Fax : +44 (0) 20 7976 1634 Fax: +44 (0) 1344 636570

  • The British Constructional Steelwork Association Ltd and The Steel Construction Institute, 2013

    Apart from any fair dealing for the purpose of research or private study or criticism or review, as permitted under the Copyright Designs and Patents Act, 1988, this publication may not be reproduced, stored or transmitted, in any form or by any means, without the prior permission in writing of the publishers, or in the case of reprographic reproduction only in accordance with the terms of the licences issued by the UK Copyright Licensing Agency, or in accordance with the terms of licences issued by the appropriate Reproduction Rights Organisations outside the UK.

    Enquiries concerning reproduction outside the terms stated here should be sent to the publishers, at the addresses given on the title page.

    Although care has been taken to ensure, to the best of our knowledge, that all data and information contained herein are accurate to the extent that they relate to either matters of fact or accepted practice or matters of opinion at the time of publication, The British Constructional Steelwork Association Limited and The Steel Construction Institute assume no responsibility for any errors in or misinterpretations of such data and/or information or any loss or damage arising from or related to their use.

    Publications supplied to the Members of BCSA and SCI at a discount are not for resale by them.

    Publication Number: 55/1 ISBN 10: 1-85073-065-2 ISBN 13: 978-1-85073-065-1

    British Library Cataloguing-in-Publication Data.

    A catalogue record for this book is available from the British Library.

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  • FOREWORD

    The objective of this publication is to present a practical guide to the design of structural steel elements for buildings. The document comprises three principal Sections: general guidance, general design data and design tables.

    Generally the guidance is in accordance with BS EN 1993-1-1: 2005 Eurocode 3: Design of steel structures Part 1.1: General rules and rules for buildings, its UK National Annex and other relevant Eurocodes. Worked examples are presented where appropriate. No attempt has been made to consider complete structures, and it is to be noted therefore that certain important design matters are not dealt with - those for instance of overall stability, of interaction between components and of the overall analysis of a building.

    The Section on General Design Data includes bending moment diagrams, shear force diagrams and expressions for deflection calculations. A variety of beams and cantilevers with different loading and support conditions are covered. Expressions for properties of geometrical figures are also given, together with useful mathematical solutions.

    The design tables also include section property, member resistance and ultimate load tables calculated according to BS EN 1993-1-1: 2005 and its associated National Annex. The tables are preceded by a comprehensive set of explanatory notes. Section ranges include universal beams and columns, joists, parallel flange channels, asymmetric beams, equal angles, unequal angles, equal angles back-to-back, unequal angles back-to-back, Tees cut from universal beams and columns, hot-finished circular, square and rectangular hollow sections and cold-formed circular, square and rectangular hollow sections. The range includes the Tata Steel Advance sections. In addition to the BS section designation, the tables also provide the Advance, Celsius and Hybox branding. The relationship between the branded sections/steel grade and the BS sections/steel grades is given in Section 11 of the explanatory notes.

    The member resistance tables also include the resistances for commonly used non-preloaded and preloaded bolts together with the longitudinal and transverse resistances of fillet welds.

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  • ACKNOWLEDGEMENTS

    This publication is jointly published by the BCSA and the SCI. The preparation of this publication was carried out under the guidance of a steering group consisting of the following members:

    Dr D. B. Moore The British Constructional Steelwork Association

    Mr. D. G. Brown The Steel Construction Institute

    Dr R. J. Pope The British Constructional Steelwork Association

    Valuable comments were also received from:

    Mr. A. S. Malik The Steel Construction Institute Mr. D. C. Iles The Steel Construction Institute

    The section property and member resistance tables for this edition were produced by Miss E. Nunez Moreno formerly of the Steel Construction Institute.

    This publication has been jointly funded by the BCSA and the SCI.

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  • Contents

    Page No.

    FORWARD

    ACKNOWLEDGEMENTS

    CHAPTER 1 GENERAL DESIGN CONSIDERATIONS 1.1 Design aims 1

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    1.2 Introduction to BS EN 1990 1.3 Limit state design

    1.3.1 Ultimate limit states 1.3.2 Serviceability limit states 1.3.3 Structural integrity 1.3.4 Durability

    1.4 Actions Eurocodes 1.5 Design basis for structural steelwork 1.6 Steel structures Eurocode 3

    1.6.1 Structural analysis 1.6.2 Sway stiffness

    1.7 Steel design strength 1.8 Structural integrity

    CHAPTER 2 RESISTANCE OF CROSS-SECTIONS 2.1 Local buckling 2.2 Classification

    2.2.1 Classes of cross-sections 2.2.2 Classification process

    2.3 Example 2.1 Section classification 2.4 Classification of UB and UC sections 2.5 Shear resistance 2.6 Bending resistance 2.7 Example 2.2 Beam with full lateral resistant

    CHAPTER 3 BUCKLING RESISTANCE OF BEAMS 3.1 Design considerations 3.2 Buckling resistance of laterally unrestrained beams

    3.2.1 Reduction factor for lateral-torsional buckling 3.2.2 Non-dimensional slenderness for lateral-torsional buckling

    3.3 Example 3.1 Simply supported beam with lateral restraint at load points 3.4 Resistance of webs to transverse forces (web bucking and bearing) 3.5 Web stiffeners 3.6 Example 3.2 Web subject to transverse forces 3.7 Example 3.3 Web stiff