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Re: Jib crane impact factor[Subject Prev][Subject Next][Thread Prev][Thread Next]
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- Subject: Re: Jib crane impact factor
- From: <h.d.richardson(--nospam--at)shaw.ca>
- Date: Thu, 4 Jul 2013 10:22:25 -0600
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Drew,Bob MacCrimmon's book is very good. It specifically addresses the building structures that support cranes. He put a lot of work into it plus it was circulated for review and comments at least three times before it went to publication. I know I made three or four pages of comments and suggestions, most of which were either incorporated or at least addressed. I also know that the same was true for other people as well. In the end, I thought it was a very good collaborative publication.
Regards, Daryl----- Original Message ----- From: "Gary L. Hodgson and Assoc." <design(--nospam--at)hodgsoneng.ca>
To: <seaint-seaosc(--nospam--at)mail-list.com> Sent: Thursday, July 04, 2013 7:08 AM Subject: Re: [SEAINT-SEAOSC] Jib crane impact factor
Drew,I can't add much to what has already been said, except that I have been designing cranes and runways since 1967 and I and others whom I know have never used Limit States Design (your LRFD). There is no real savings in it except in building structures. Daryl is right about crane abuse. I would also recommend a Canadian publication-"Crane Supporting Steel Structures Design Guide" authored by R A MacCrimmon. It was published by the Canadian Institute of Steel Construction (2nd edition) and was available free on-line and a hard copy for a fee. Bob MacCrimmon used LSD as that is code in Canada. The design guide recommended by Bill is excellent.Gary On 2013/07/04 12:31 AM, h.d.richardson(--nospam--at)shaw.ca wrote:Drew,There is an association called Crane Manufacturers Association of America (CMAA), whose name I couldn't recall for my earlier posting that specifies impact factors based on lift rates and many other things. I don't have a recent edition of their publication but an earlier edition specifically forbade the use of design methods based on
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