ISO/TR TECHNICAL REPORT 24679-3 First edition 2015-08-01 Fire safety engineering Performance of structure in fire - Part 3: Example of an open car park Ingenierie de la sécurite incendie - Performance des structures en situation dincendie- Partie 3: Exemple d'un parking aérien largement ventilé Reference number IS0/TR24679-3:2015(E) SO International Organization for Standardization @ IS0 2015 dardization 5956617 IS0/TR24679-3:2015(E) COPYRIGHTPROTECTEDDOCUMENT IS02015,PublishedinSwitzerland All rights reserved. Unless otherwise specified, 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 below or ISO's member body in the country of the requester. ISO copyrightoffice Ch. de Blandonnet 8 . CP 401 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749 01 11 Fax +41 22 749 09 47 [email protected] www.iso.org Intenationaibr PrganizationforStandardization etworking permitted without license from IHS IS0/TR 24679-3:2015(E) Contents Page Foreword ..iv Introduction. ..V 1 Scope. .1 2 Normative references ..1 3 Terms and definitions ..2 4 Design strategy for fire safety of structures. ..2 5 Quantification of the performance of structures in fire .2 5.1 Fire performance of structures - Design process. .2 5.2 Step 1: Scope of the project for fire safety of structures .2 5.2.1 Built environment characteristics .2 5.2.2 Fuel loads .4 5.2.3 Mechanical actions. ..5 5.3 Step 2: Identify objectives, functional requirements, and performance criteria for fire safety of structures .5 5.4 Step 3:Trialdesignplan forfire safetyof structures. .6 5.5 Step 4: Design fire scenarios and design fires. .8 5.5.1 Design fire scenarios .8 5.5.2 Design fires (thermal actions) .10 5.6 Step 5: Thermal response of the structure .13 5.7 Step 6: Mechanical response of the structure .17 5.8 Step 7: Assessment against the fire safety objectives .22 5.9 Documentation of the design for fire safety of structures 22 5.10 Factors and influences to be considered in the quantification process ..22 6 Guidance on use of engineering methods ..22 Annex A (informative) Analysis of structural behaviour of open car parks ..23 Annex B (informative) Views and plans of the open car park .38 Bibliography .41 iii dardization5956617