Light SteeL Framing in reSidentiaL ConStruCtion

1 Light SteeL Framing in reSidentiaL ConStruCtionLight SteeL Framing in reSidentiaL ConStruCtioniE YANDZIO MEng, CEng, MICER M LAWSON BSc(Eng), PhD ACGI, CEng, MICE, MIStructEA G J WAY MEng, CEng, MICEL ight SteeL Framing in reSidentiaL ConStruCtionSCI PublICatIon P402ii 2015 SCI. All rights Number: SCI P402 ISBN 13: 978-1-85942-215-1 Published by:SCI, Silwood Park, Ascot, Berkshire. SL5 7QN UKT: +44 (0)1344 636525 F: +44 (0)1344 636570 E: reception@ SteeL report any errors, contact: publications@ SteeL from any fair dealing for the purposes 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.

2 Or in accordance with the terms of licences issued by the appropriate Reproduction Rights Organisation outside the concerning reproduction outside the terms stated here should be sent to the publishers, 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, SCI, the authors and the reviewers 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 supplied to the members of the Institute at a discount are not for resale by Library Cataloguing-in-Publication Data.

3 A catalogue record for this book is available from the British text paper in this publication is totally chlorine free. The paper manufacturer and the printers have been independently certified in accordance with the rules of the Forest Stewardship (The SteeL ConStruCtion Institute) is the leading, independent provider of technical expertise and disseminator of best practice to the SteeL ConStruCtion sector. We work in partnership with clients, members and industry peers to help build businesses and provide competitive advantage through the commercial application of our knowledge.

4 We are committed to offering and promoting sustainable and environmentally responsible service spans the following areas:MembershipIndividual & corporate membershipAdviceMembers advisory serviceInformationPublicationsEducationE vents & trainingConsultancyDevelopmentProduct developmentEngineering supportSustainabilityAssessmentSCI AssessmentSpecificationWebsitesEngineeri ng softwareiiiThis publication has been based on the original SCI publication P301 (published in 2001); it has been revised to include current design and ConStruCtion practice. Reference is made to the Eurocodes and the UK National Annexes which form the basis for the current British of this publication has been carried out by Mr E Yandzio, Mr A G J Way and Prof R M Lawson.

5 The production of this publication was assisted by the following individuals and organisations including members of the Light SteeL Forum; their assistance is gratefully acknowledged:Mr P Short Ayrshire Metal ProductsMr M Richards B W Industries M Jowett Fusion Building SystemsMr P Jasper Kingspan SteeL Building SolutionsMr O Rogan Metek UKThe work in producing this publication has been funded by The SteeL ConStruCtion Foreword iii Summary vii1 INTroduCTIoN To Light SteeL ConStruCtion Methods of ConStruCtion Why use Light SteeL frames Scope of publication Building Regulations 2010 102 GeNeraL reQuIremeNTS oF THe BuILdING reGuLaTIoNS THaT aFFeCT Light SteeL Framing Structural

6 Performance Fire resistance Acoustic performance Thermal performance Thermal bridging Radon gas infiltration 413 oTHer PerFormaNCe reQuIremeNTS For Light SteeL Framing Durability and design life Dimensional discipline Health and safety requirements 464 FouNdaTIoNS Site tolerances Foundation types Holding down requirements 515 GrouNd FLoorS SteeL joist floor beam and block floors Composite ground floor slab 576 INTermedIaTe FLoorS Floor finishes Design of Light SteeL floor joists Concrete floors Separating floors Compartment floors 697 eXTerNaL aNd Load-BearING waLLS Design for wind forces Design for axial load Connections Details of external wall ConStruCtion Internal wall ConStruCtion Fixing wall linings 958 rooF ConStruCtion Loading on roofs Pitched roofs ConStruCtion details Flat roofs 1039 SerVICeS Details for service openings in floors and walls Separating and compartment walls and floors Installation of gas appliances Attachment to walls Lightning conduction Mobile phone

7 Reception 11110 eXTerNaL waLL SySTemS Infill walls Continuous wall panels Design of Infill walling Panelised system Cladding options 116 reFereNCeS 119viviiThis publication provides information and guidance on the ConStruCtion of Light SteeL frames in general applications for reSidentiaL ConStruCtion , which includes single family houses and apartments. Light SteeL Framing systems use galvanized cold formed SteeL sections as the primary structural components, which can be assembled as prefabricated publication addresses aspects of design within the scope of the Building Regulations (England and Wales).

8 It also covers ConStruCtion practice and detailing of Light SteeL frames and their interfaces with other materials and components. The information is generic and focuses on general ConStruCtion design information is given on structural design and robustness, serviceability of floors, thermal and acoustic performance, and fire resistant design. Design guidance presented is in accordance with SteeL Framing is generally based on the use of C or Z shaped SteeL sections produced by cold rolling from strip SteeL . Cold formed sections are generically different from hot rolled SteeL sections, such as universal Beams, which are used in fabricated steelwork.

9 The SteeL used in cold formed sections is relatively thin, typically to mm, and is galvanized for corrosion protection. Cold formed SteeL sections are widely used in many sectors of ConStruCtion , including mezzanine floors, industrial buildings, commercial buildings and hotels and have gained a significant market share in the reSidentiaL sector. This publication presents general guidance and details on the use of Light SteeL Framing in reSidentiaL ConStruCtion , in ways which meet the requirements of the Building Regulations in England and Wales. However, much of the guidance will also be applicable to the use of Light SteeL Framing in other main forms of ConStruCtion include load-bearing frames, and infill walls to SteeL or concrete framed buildings.

10 Increasingly mixed use buildings are designed, for example where reSidentiaL units are located over retail or commercial space, in which case Light SteeL frames are supported by a SteeL or concrete structure for the levels below. Light SteeL Framing is also used in modules, although detailed guidance on modular ConStruCtion is not within the scope of this publication, for guidance on modular ConStruCtion see SCI publication P302[1] and ED014[2].Examples of housing and reSidentiaL buildings constructed using Light SteeL Framing are shown in Figure to Figure For further information see also SCI publications ED011[3] and ED012[4].