ISO INTERNATIONAL STANDARD 12944-3 Second edition 2017-11 Paints and varnishes Corrosion protection of steel structures by protective paint systems Part 3: Design considerations Peintures et vernis - Anticorrosion des structures en acier par systemes de peinture - Partie 3: Conception et dispositions constructives Reference number ISO 12944-3:2017(E) [so @ IS0 2017 Provided by IHS Markit under license with ANSI IS0 12944-3:2017(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 writtenpermission.PermissioncanberequestedfromeitherIsOattheaddressbeloworIsO'smemberbodyinthecountryof the requester. ISO copyright office Ch. de Blandonnet 8 . CP 401 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749 01 11 Fax +41 22 749 09 47 [email protected] www.iso.org ii @ IS0 2017 - All rights reserved Provided by IHS Markit under iense with ANSI IS0 12944-3:2017(E) Contents Page Foreword iv Introduction 1 Scope 2 Normative references.. 1 3 Terms and definitions 4 General. 5 Basic design criteria for corrosion protection purposes 5.1 General. 5.2 Accessibility 5.3 Treatment of gaps. 5.4 Precautions to prevent retention of deposits and water. 5.5 Surface imperfections 5.6 Bolted connections. 5.6.1 Slip-resistant connections with high-tensile bolts 5.6.2 Preloaded connections. 5.6.3 Bolts, nuts and washers. 5.7 Box members and hollow components 5.8 Notches.. 5.9 Stiffeners 5.10 Prevention of galvanic corrosion 5.11 Handling, transport and erection. Annex A (informative) Accessibility - Typical distances required for tools in corrosion protection work.... Annex B (informative) Recommended minimum dimensions of openings for access to confined areas .. 7 Annex C (informative) Minimum dimensions for narrow spaces between surfaces Annex D (informative) Design features which can be used to avoid deposits accumulating or water being trapped.. 10 Bibliography 14 @ IS0 2017 - All rights reserved iii Provided by IHS Markit under license with ANSI