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RE: Design of knee braced steel frame for support of a crane on a trolley

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..you are building a moment frame. Should the treatment of the problem not
be the same? Ordinary moment frame, perhaps since special moment frame
details may not be possible in a knee brace system?

-----Original Message-----
From: Simon Solorio [mailto:simon(--nospam--at)solorio.com]
Sent: Friday, December 03, 1999 12:34 PM
To: seaint(--nospam--at)seaint.org
Subject: Design of knee braced steel frame for support of a crane on a
trolley


I'm design knee braced frames for support of a crane on a trolley.
The size in plan view is 48' x 24' with for columns at each corner with
steel beams connecting the columns at the top.
I need some feed back on what the "R" value is for a knee braced steel
frame. (UBC 1997, seismic zone 4)

I'm considering the structure a nonbuilding structure (UBC section 1634), so
would the "R" value be 2.9 per table 16-P?

thanks in advance for any comments.

Simon Solorio, PE