ISO INTERNATIONAL STANDARD 16598 First edition 2015-09-01 Timber structures Structural classification for sawn timber Structures en bois-Classification structurelle pourbois sciés Reference number IS0 16598:2015(E) ISO @IS02015 IS0 16598:2015(E) COPYRIGHTPROTECTEDDOCUMENT @ IS0 2015, Published in Switzerland 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 copyright office Ch. de Blandonnet 8 . CP 401 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749 01 11 Fax+4122 749 09 47 copyright@iso.org www.iso.org @ IS0 2015 - All rights reserved Copvriaht Inte IS0 16598:2015(E) Contents Page Foreword .iv Introduction. ..V 1 Scope. ..1 2 Normative references ..1 3 Terms and definitions .1 4 Timber population and structural property data .2 5 Primary properties .2 5.1 Framework .2 5.2 Bending or tension property evaluation. .3 5.2.1 General .3 5.2.2 Exception. .3 5.3 Density evaluation .3 5.4 Class boundaries. .3 6 Derived properties .3 6.1 Framework .3 6.2 Evaluation. 3 6.2.1 General .3 6.2.2 Exception .3 7 Allocation to a class .4 7.1 Framework. 4 7.1.1 General 4 7.1.2 Normalization of characteristic values ..4 7.2 Grading systems 4 7.2.1 General .4 7.2.2 Exception .4 7.3 Design values. .5 8 Reporting .5 Annex A (normative) Timber population and structural property data ..6 Annex B (informative) Structural class example table ..9 Annex C (informative) Commentary .13 Bibliography .19 son ta? Standardizann rights reserved iii