ISO INTERNATIONAL STANDARD 14122-3 Second edition 2016-06-01 Safety of machinery - Permanent means of access to machinery - Part 3: Stairs, stepladders and guard-rails Sécurité des machines - Moyens d'acces permanents aux machines- Partie 3: Escaliers, échelles a marches et garde-corps Reference number IS0 14122-3:2016(E) ISO International Organization for Standardization @ IS0 2016 ZHEJIANG INST OF STANDARDIZATION C1 5956617 mitted without license from IHS IS0 14122-3:2016(E) COPYRIGHT PROTECTED DOCUMENT IS0 2016, 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 Licensee-ZHEJIANG INST OF STANDARDIzoISQ 6 - All rights reserved networking permited without license from IHS IS0 14122-3:2016(E) Contents Page Foreword ..iv Introduction. ..V 1 Scope. ..1 2 Normative references ..1 3 Terms and definitions ..1 4 General requirements ..6 4.1 Construction and materials .6 4.2 Design and construction for the structure and the steps ..6 5 Specific requirements applicable to stairs .6 6 Specific requirements applicable to step ladders. ..7 7 Specific requirements applicable to guard-rails ..9 7.1 Guard-rails for platforms, walkways and stair landings ..9 7.2 Guard-rails and handrails for stairs and handrails for step ladders. ..11 7.3 Additional fall-protection when steps, stairs or ladders are near guard-rails of working platforms .. .13 7.4 Gates. .13 8 Verification of safety requirements ..14 8.1 General. .14 8.2 Testing of guard-rails .14 8.2.2 Testing procedure 16 8.3 Testing of steps of a stair. 17 8.4 Testing of stepladders. .19 Annex A (informative) Significant technical changes between this part of Is0 14122 and the previous edition. .20 Bibliography .22 ii e=ZHEJIANG INST OF STANDARDIZATION C1 5956617 thout license from IHS