ISO INTERNATIONAL STANDARD 16696-1 First edition 2019-02 Timber structures Cross laminated timber - Part 1: Component performance, production requirements and certification scheme Structures en bois - Plaques reconstituees a base de lamelles croisees Partie 1: Performances des composants et exigences de production et systemedecertification Reference number ISO 16696-1:2019(E) so @ IS0 2019 IS0 16696-1:2019(E) COPYRIGHTPROTECTEDDOCUMENT @ ISO 2019 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 below or Iso's member body in the country of the requester. ISO copyright office CP 401 : 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 ii @ IS0 2019 - All rights reserved IS0 16696-1:2019(E) Contents Page Foreword ..V Introduction. ...vi 1 Scope. 2 Normative references 3 Terms and definitions 4 Symbols and subscripts. 4.1 Symbols .6 4.2 Subscripts. ..6 CLT panel dimensional tolerances .1 5 5.1 Dimensional tolerances at time of manufacture .1 5.1.1 General. 5.1.2 Panel thickness. .7 5.1.3 Layer thickness. 5.1.4 Panel width 7 5.1.5 Panel length 5.1.6 Grooves and edge bonds .1 5.2 Squareness 1 5.3 Straightness .8 Component requirements. .8 6.1 Solid sawn timber. .8 6.1.1 Solid sawn timber species .8 6.1.2 Solid sawn timber sizes. ..8 6.1.3 Moisture content. 6.1.4 Solid sawn timber face-bonding surface ..8 6.1.5 Face-bonding dimensional tolerances ..9 6.2 Wood based panels. 9 6.2.1 General .9 6.2.2 Moisture content .9 6.2.3 Wood based panels face-bonding surface .9 6.2.4 Face-bonding dimensional tolerances .9 6.3 Adhesive requirements. 9 6.3.1 General. .9 6.3.2 Testing for minor changes of adhesive systems. .9 6.3.3 Finger joints in laminations when used. 6.3.4 Edge joints in laminations when used. .10 6.3.5 Glue line integrity forglue lines between layers (face joints) .10 6.3.6 Shear strength of edge bonds in solid sawn timber layers. ..10 6.4 Large finger joints of panels. ..10 6.4.1 General ..10 6.4.2 Bending strength .10 7 Cross laminated timber performance criteria .10 7.1 Layup requirements. .10 7.2 Mechanical resistance of cross laminated timber products. .11 7.3 Durability against biological attack. ..11 7.3.1 General. ..11 7.3.2 Solid sawn timber layers without preservative treatment ..11 7.3.3 Solid sawn timber layers with preservative treatment ..11 7.3.4 CLT treated with preservative treatment ..11 7.4 Formaldehyde emission. ..12 7.5 Dimensional stability. ..12 7.5.1 General 7.5.2 Maximum deviations. .12 @ IS0 2019 - All rights reserved iii