0-21_Edtn_2005.pdf

AN AMERICAN NATIO NAL STANDAR DManually Lever Operated HoistsASME B30.21-2005(Revision of ASME B30.21-1999)Safety Standard for Cableways,Cranes,Derricks,Hoists,Hooks,Jacks,and SlingsCopyrighted material licensed to Stanford University by Thomson Scientific(),downloaded on Oct-05-2010 by Stanford University User.No further reproduction or distribution is permitted.Uncontrolled when printed.ASME B30.21-2005(Revision of ASME B30.21-1999)Manually LeverOperated HoistsSafety Standard for Cableways,Cranes,Derricks,Hoists,Hooks,Jacks,and SlingsAN AMERICAN NATIONAL STANDARDThree Park Avenue New York,NY 10016Copyrighted material licensed to Stanford University by Thomson Scientific(),downloaded on Oct-05-2010 by Stanford University User.No further reproduction or distribution is permitted.Uncontrolled when printed.Date of Issuance:July 29,2005The next edition of this Standard is scheduled for publication in 2008.There will be no addendaissued to this edition.ASME issues written replies to inquiries concerning interpretations of technical aspects of thisStandard.Interpretations are published on the ASME Web site under the Committee Pages athttp:/www.asme.org/codes/as they are issued,and will also be published within the next editionof the Standard.ASME is the registered trademark of The American Society of Mechanical Engineers.This code or standard was developed under procedures accredited as meeting the criteria for American NationalStandards.The Standards Committee that approved the code or standard was balanced to assure that individuals fromcompetent and concerned interests have had an opportunity to participate.The proposed code or standard was madeavailable forpublic review andcomment thatprovides an opportunityfor additional publicinput from industry,academia,regulatory agencies,and the public-at-large.ASME does not“approve,”“rate,”or“endorse”any item,construction,proprietary device,or activity.ASME does not take any position with respect to the validity of any patent rights asserted in connection with anyitems mentioned in this document,and does not undertake to insure anyone utilizing a standard against liability forinfringement of any applicable letters patent,nor assume any such liability.Users of a code or standard are expresslyadvised that determination of the validity of any such patent rights,and the risk of infringement of such rights,isentirely their own responsibility.Participation by federal agency representative(s)or person(s)affiliated with industry is not to be interpreted asgovernment or industry endorsement of this code or standard.ASME accepts responsibility for only those interpretations of this document issued in accordance with the establishedASME procedures and policies,which precludes the issuance of interpretations by individuals.No part of this document may be reproduced in any form,in an electronic retrieval system or otherwise,without the prior written permission of the publisher.The American Society of Mechanical EngineersThree Park Avenue,New York,NY 10016-5990Copyright 2005 byTHE AMERICAN SOCIETY OF MECHANICAL ENGINEERSAll rights reservedPrinted in U.S.A.Copyrighted material licensed to Stanford University by Thomson Scientific(),downloaded on Oct-05-2010 by Stanford University User.No further reproduction or distribution is permitted.Uncontrolled when printed.CONTENTSForeword.vCommittee Roster.viB30 Series Introduction.viiiSummary of Changes.xiChapter 21-0Scope,Definitions,and References.1Section 21-0.1 Scope of B30.21.1Section 21-0.2 Definitions.1Section 21-0.3 References.7Chapter 21-1Chain Type.8Section 21-1.1 Marking.8Section 21-1.2 Construction.8Section 21-1.3 Inspection.9Section 21-1.4 Testing.10Section 21-1.5 Maintenance.12Section 21-1.6 Welded Link Chain Inspection,Replacement,and Maintenance.13Section 21-1.7 Roller Chain Inspection,Replacement,and Maintenance.13Section 21-1.8 Operation.14Chapter 21-2Wire Rope Type.16Section 21-2.1 Marking.16Section 21-2.2 Construction.16Section 21-2.3 Inspection.17Section 21-2.4 Testing.19Section 21-2.5 Maintenance.20Section 21-2.6 Wire Rope Inspection,Replacement,and Maintenance.20Section 21-2.7 Operation.21Chapter 21-3Web Strap Type.23Section 21-3.1 Marking.23Section 21-3.2 Construction.23Section 21-3.3 Inspection.24Section 21-3.4 Testing.26Section 21-3.5 Maintenance.27Section 21-3.6 Web Strap Inspection,Replacement,and Maintenance.27Section 21-3.7 Operation.28iiiCopyrighted material licensed to Stanford University by Thomson Scientific(),downloaded on Oct-05-2010 by Stanford University User.No further reproduction or distribution is permitted.Uncontrolled when printed.Figures1Manually Lever Operated Hoist Chain Type.22Manually Lever Operated Hoist Wire Rope.33Manually Lever Operated Hoist Web Strap.34Manually Lever Operated Hoist Chain Type.45Load Chain.56Guide and Load Sprocket-Strap.57Load Controlling Mechanism.68Overtravel Restraint.79Load Sprockets.710Swivel Type Hook.9Tables1Minimum Inspection for Lever Operated Hoists Chain.112Min