ISO INTERNATIONAL STANDARD 24679-1 First edition 2019-01 Fire safety engineering Performance of structures in fire - Part 1: General Ingénierie de la sécurite incendie - Performances des structures en situation d'incendie- Partie 1:Généralités Reference number ISO 24679-1:2019(E) so @ IS0 2019 IS0 24679-1:2019(E) COPYRIGHTPROTECTEDDOCUMENT @IS02019 All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either IsO at the address beloworIso'smemberbodyinthecountryoftherequester. ISO copyright office CP 40i: Ch. de Blandonnet 8 CH-1214 Vernier, Geneva Phone: +4122 749 0111 Fax: +41 22 749 09 47 Email: [email protected] Website: www.iso.org Published in Switzerland i @ IS0 2019 - All rights reserved IS0 24679-1:2019(E) Contents Page Foreword iv Introduction 1 Scope. .1 2 Normative references. .1 3 Terms and definitions 1 4 Design strategy for fire safety of structures 2 4.1 General design process for fire safety of structures 2 4.2 Practical design process guidance for fire safety of structures 4 5 Quantification of the performance of structures in fire 9 5.1 Scope of the project for fire safety of structures. 9 5.1.1 Built-environment characteristics 9 5.1.2 Fuel loads. 9 5.1.3 Mechanical actions 9 5.2 Identifying objectives, functional requirements and performance criteria for fire safety of structures. 9 5.2.1 Objectives and functional requirements for fire safety of structures 9 5.2.2 Performance criteria for fire safety of structures.. 13 5.3 Trial design plan for fire safety of structures. .14 5.4 Design fire scenarios and design fires (thermal actions) 15 5.4.1 General. 15 5.4.2 Design fire scenarios 15 5.4.3 Design fires (thermal actions) 15 5.5 Thermal response of the structure. 17 5.6 Mechanical response of the structure. 18 5.7 Assessment against the fire safety objectives 19 5.8 Documentation of the design for fire safety of structures 19 5.9 Factors and influences to be considered in the quantification process. 20 5.9.1 Material properties 20 5.9.2 Effect of continuity and restraint (interaction between elements and materials) 21 5.9.3 Use of test results .22 5.9.4 Fire spread routes.. 22 6 Guidance on use of engineering methods .25 6.1 General 25 6.2 Using calculation methods. 25 6.3 Using experimental methods 26 6.4 Using engineering judgment 27 Bibliography 28 @ IS0 2019 - All rights reserved iii