CMAA Impact Factors
CMAA Impact Factors
(OP)
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
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






RE: CMAA Impact Factors
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
www.cdeco.com
RE: CMAA Impact Factors
The fax is on its way.
Regards,
Lutfi
www.cdeco.com