ISO INTERNATIONAL STANDARD 12122-4 First edition 2017-01 Timber structures Determination of characteristic values - Part 4: Engineered wood products Structures en bois Détermination des valeurs caracteristiques - Partie 4: Produits bois reconstitués Reference number ISO 12122-4:2017(E) International Organization for Standardization @ IS0 2017 ZHEJIANG INST OF STANDARDIZATION C15956617 ted without license from IHS IS0 12122-4:2017(E) COPYRIGHTPROTECTEDDOCUMENT IS0 2017, 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 copyrightoffice Ch. de Blandonnet 8 . CP 401 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749 01 11 Fax +41 22 749 09 47 copyright@iso.org www.iso.org Internatinair PrganizationforStandardization nsee-ZHEJIANG INSTOFSTANDARDIZAoSQa7 - All rights reserved etworking permitted without license from IHS IS0 12122-4:2017(E) Contents Page Foreword ..iv Introduction. ..V 1 Scope. ..1 2 Normative references 3 Terms and definitions ..1 4 Symbols. ..2 5 Reference population .2 6 Sampling. .2 6.1 Sampling method .2 6.2 Samplesize .2 7 Sample conditioning ..2 8 Test data .3 8.1 Test method .3 8.2 Test data compatible with product description .3 8.3 Failure modes. .3 9 Evaluation of characteristic values for structural properties .3 9.1 Structural properties. .3 9.2 Characteristic values of material properties 3 9.2.1 Characteristic modulus of elasticity and shear modulus .3 9.2.2 Characteristic bearing strength. 4 9.2.3 Other characteristic values for strength based on the 5th percentile test value.... 4 9.3 Characteristic values of component properties 9.3.1 Characteristicstiffness .4 9.3.2 Characteristic bearing strength 4 9.3.3 Other characteristic capacities for strength based on the 5th percentile testvalue .4 10 Report ..4 Annex A (informative) Commentary .5 Annex B (informative) Analytical models for determining characteristic properties of engineered wood products 10 Bibliography 11 iii ZHEJIANG INSTOFSTANDARDIZATION C15956617