ISO INTERNATIONAL STANDARD 8686-1 Secondedition 2012-12-15 Cranes Design principles for loads and load combinations Part 1: General Appareils de levage a charge suspendue - Principes de calcul des charges et des combinaisons de charge - Partie 1: Généralités Reference number IS0 8686-1:2012(E) ISO CopyrhematioaOrganizationforStandadizatio @IS02012 HS under I Not for Resale IS0 8686-1:2012(E) COPYRIGHT PROTECTED DOCUMENT ISO2012 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either IsO at the addressbeloworIso'smemberbodyinthecountryoftherequester. ISO copyright office Case postale 56 : CH-1211 Geneva 20 Tel.+41227490111 Fax + 41 22 749 09 47 E-mail [email protected] Web www.iso.org Published in Switzerland @ IS0 2012 - All rights reserved Not for Resale IS0 8686-1:2012(E) Contents Page Foreword ..iv 1 Scope .1 2 Normative references ..1 3 Terms and definitions .1 4 Symbols .2 5 General. ..2 5.1 General principles :2 5.2 Methods of proof of competence calculations .3 5.3 Assessment of loads .3 5.4 Categories of loads. .4 6 Loads and applicable factors ..4 6.1 Regular loads .4 6.2 Occasional loads. ..9 6.3 Exceptional loads 10 6.4 Miscellaneous loads. .13 7 Principles of choice of load combinations .13 7.1 Basicconsiderations .13 7.2 Load combinations during erection, dismantling and transport ..17 7.3 ApplicationofTable3 17 7.4 Partial safety factors for the proof of rigid body stability. 20 Annex A (normative) Application of allowable stress method and limit state method of design ...21 Annex B (informative) General guidance on application of dynamic factors Φ .26 Annex C (informative) Example of model for estimating value of dynamic factor Φ4 for cranes travelling on rails.. .27 Annex D (informative) Example of determination of loads caused by acceleration .31 Annex E (informative) Example of method for analysing loads due to skewing. ..40 Annex F (informative) Illustration of types of hoist drives ..46 Bibliography ..49 ii thout license from IHS Not for Resale