huangyhg

cmaa impact factors
a while back i wrote an excel program designed to pick standard crane girders (w-shape & channel) based on different cranes. in the program i inputted a small table that references different impact factors (from 5% to 25%) for vertical, lateral, and longitudinal loads based on the cmaa classification. a "a" use group looked similar to the aisc factors, but "d" & "e" get pretty ugly.
however now, i'm unable to figure out what piece of literature i referenced that table from. i know i just didn't make it up, but i've been through my library of texts.
i fear that i may have stumbled upon a cmaa table that is used to design crane-bridge girders....and have been applying it to the design of structural (rail-supporting) girders.
can anybody deny,confirm, or point me in the right direction?
many thanx

i have this table. let me have your fax number and or your e-mail and i would be happy to send it to you.
my source is aisc engineering journal, fourth quarter, 1982. david t. ricker wrote the paper. it is on page 193.
i hope this helps.
regards,
lutfi
if you have the whiting crane handbook, it is there as well. that is the source of the data that ricker cited.i do not recall these impact values published in cmaa, at least not right away.
the fax is on its way.
regards,
lutfi

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