1、ASME B30.7 INTERPRETATIONSASME B30.7 INTERPRETATIONSReplies to Technical InquiriesJanuary 2007 Through January 2011FOREWORDThis publication includes all of the written replies issued between the indicated dates by theSecretary, speaking for the ASME B30 Standards Committee, Safety Standard for Cable
2、ways,Cranes, Derricks, Hoists, Hooks, Jacks, and Slings, to inquiries concerning interpretations oftechnical aspects of ASME B30.7, Winches (formerly titled Base-Mounted Drum Hoists).These replies are taken verbatim from the original letters except for a few minor typographicaland editorial correcti
3、ons made for the purpose of improved clarity. In some few instances, areview of the interpretation revealed a need for corrections of a technical nature; in these cases,a corrected interpretation follows immediately after the original reply.These interpretations were prepared in accordance with the
4、accredited ASME procedures.ASME procedures provide for reconsideration of these interpretations when or if additionalinformation is available that the inquirer believes might affect the interpretation. Further, personsaggrieved by this interpretation may appeal to the cognizant ASME Committee or Sub
5、committee.ASME does not “approve,” “certify,” “rate,” or “endorse” any item, construction, proprietarydevice, or activity.I-1ASME B30.7 INTERPRETATIONSInterpretation: 7-1Subject: ASME B30.7-2006, Base-Mounted Drum Hoists, Para. 7-1.2.2(d)(1), Drum Diameter RatioDate Issued: June 29, 2009Question (1)
6、: Does this paragraph addressing hoist drum diameter also apply to sheaves usedto provide multiple parts? For example, the D/d ratio for the hoist drum used for lifting is 18:1.Reply (1): No. Sheaves are outside the scope of this Volume.Question (2): Is there a minimum diameter ratio for top-mounted sheaves when a base-mounteddrum hoist is used as part of a hoisting system?Reply (2): No. Sheaves are outside the scope of this Volume.I-2
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