ISO INTERNATIONAL STANDARD 12468-1 Second edition 2013-11-01 External exposure of roofs to fire - Part 1: Test method Exposition des toitures a un feu exterieur - Partie 1: Meéthode d'essais Reference number IS0 12468-1:2013(E) ISO @IS02013 No reproduction or networking permitted without license from IHS Not for Resale IS0 12468-1:2013(E) COPYRIGHT PROTECTED DOCUMENT @IS02013 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form 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 copyright office Case postale 56 : CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax+4122 749 09 47 E-mail copyright@iso.org Web.www.iso.org Published in Switzerland @ IS0 2013 - All rights reserved Not for Resale IS0 12468-1:2013(E) Contents Page Foreword ..iv Introduction. ..V 1 Scope. ...1 2 Normative references 3 Terms and definitions 4 Symbols. 5 Selection of test specimen pitch ..3 6 Test specimens... 6.1 General requirements .3 6.2 Selection of standard supporting elements ..5 6.3 Positioning of joints. .6 6.4 Edge detailing .7 7 Test equipment. .7 7.1 Exposure levels .7 7.2 Brands. 7.3 Wind. .10 7.4 Radiation 11 7.5 Timing device .11 7.6 Calibration element .11 7.7 Specimen holder. ..11 7.8 Gas burner. .15 7.9 Stand. ..17 8 Test conditions. ..17 8.1 Test environment ..17 8.2 Calibration procedure ..18 9 Conditioning and test preparation ..18 9.1 Conditioning .18 9.2 Protection of the edges .19 10 Test procedure ..19 10.1 General. .19 10.2 Commencement of the test 19 10.3 Ignition and positioning of the brands. 20 10.4 End of the test.. 21 10.5 Post-test examination .21 11 Observations and measurements .21 11.1 General. 21 11.2 External fire spread 21 11.3 Fire penetration. 21 11.4 Opening. .21 11.5 Damage. .22 12 Expression of test results. ..22 13 Test report .22 Annex A (normative) Direct field of application ..24 ytnematonalnadizarightsreerved ii ded by IHS under lic cense with ISt Not for Resale