ISO INTERNATIONAL STANDARD 20987 Firstedition 2019-10 Simplified design for mechanical connections between precast concrete structural elements in buildings Conception simplifieepourlesassemblages mecaniques entre elements structurels en betonprefabrique dans les batiments Referencenumber IS0 20987:2019(E) ISO @ IS0 2019 IS0 20987:2019(E) COPYRIGHTPROTECTEDDOCUMENT IS02019 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 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:+4122749 0111 Fax: +41 22 749 09 47 Email: copyright@iso.org Website: www.iso.org Published in Switzerland ii @ IS0 2019 - All rights reserved IS020987:2019(E) Contents Page Foreword ..vi Introduction. ..vii 1 Scope. 2 Normative references 3 Terms and definitions 4 Properties 5 Classification ..4 5.1 General 4 5.2 Strength 5.3 Ductility 4 5.3.1 Ductile connections .4 5.4 Dissipation. .5 5.5 Deformation ..5 5 6 Floor-to-floor connections 6.1 Cast-in-situ topping. .5 6.1.1 General .5 6.1.2 Strength 6 6.1.3 Other properties. .6 6.2 Cast-in-situ joints .6 6.2.1 General. .6 6.2.2 Strength 6 6.2.3 Other properties. .7 6.3 Welded steel connectors. 6.3.1 General. .7 6.3.2 Strength 6.3.3 Otherproperties. .10 6.4 Bolted steel connectors .10 6.4.1 General. .10 6.4.2 Strength .10 6.4.3 Other properties. .13 7 Floor-to-beam connections .14 7.1 Cast-in-situ joints .14 7.1.1 General. .14 7.1.2 Otherproperties. .14 7.2 Supports with steel angles .14 7.2.1 General. .14 7.2.2 Strength 16 7.2.3 Ductility 22 7.2.4 Dissipation 22 7.2.5 Deformation 23 7.2.6 Cyclic decay 23 7.2.7 Damage. 23 7.3 Supports with steel shoes. .23 7.3.1 General. 23 7.3.2 Strength 23 7.3.3 Ductility 30 7.3.4 Dissipation 30 7.3.5 Deformation 30 7.3.6 Cyclic decay. 30 7.3.7 Damage. 30 7.4 Welded supports. .30 7.4.1 General. .30 @ IS0 2019 - All rights reserved ili