ISO INTERNATIONAL STANDARD 8686-5 Second edition 2017-05 Cranes Design principles for loads and load combinations Part 5: Overhead travelling and portal bridge cranes Appareils de levage a charge suspendue - Principes de calcul des charges et des combinaisons de charges . Partie 5: Ponts roulants et ponts portiques Reference number IS0 8686-5:2017(E) [so International Organization for Standardization @ IS0 2017 HEJIANG INST OF STANDARDIZATION C1 5956617 ed without license from IHS IS0 8686-5:2017(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. ISOcopyrightoffice 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 icensee-ZHEJIANG INST OF STANDARDIZRoISQ s1.7 - All rights reserved Not for Resale, 2017/8/21 02:05:43 etworking permitted without license from IHS IS0 8686-5:2017(E) Contents Page Foreword ..iv 1 Scope 2 Normative references 3 Terms and definitions ..1 4 Symbols ..1 5 Loads and applicable factors 5.1 Regular loads .3 5.1.1 General. .3 5.1.2 Hoisting and gravity effects acting on the mass of the crane .3 5.1.3 Hoisting an unrestrained grounded load. .3 5.1.4 Loads caused by travelling on an uneven surfaces. 5 5.1.5 Loadscausedbyaccelerationofdrives 5 5.1.6 Positioning of loads .6 5.1.7 Loads induced by displacements .7 5.2 Occasional loads. .8 5.2.1 General .8 5.2.2 Loads caused by skewing 8 5.3 Exceptional loads .12 5.3.1 General. 12 5.3.2 Test loads. 13 5.3.3 Loads due to buffer forces 13 5.3.4 Loads caused by emergency cut-out 13 5.3.5 Loads caused by apprehended failure of mechanism or components 13 5.3.6 Loads due to dynamic cut-off of hoisting movement by lifting force limiters 14 5.4 Miscellaneous loads 16 6 Applicable loads, load combinations and factors ..16 7 Combination of acceleration effects .19 Annex A (informative) Skewing loads: Assumptions for simplified calculating methods .21 Bibliography .28 iii =ZHEJIANG INSTOF STANDARDIZATION C15956617 vided by IHS under ithout license from IHS Not for Resale, 2017/8/21 02:05:43