Bill,
I don't know anything about UBC, but the new AISC code has formulas for calculating bracing forces. You can find the requirements in Appendix 6 of AISC 360-05 which is a free download on AISC's website if you don't have a copy of the newest steel manual yet.
Wesley C. Werner
From: Bill Allen [mailto:T.W.Allen@cox.net]
Sent: Thursday, 4 October 2007 10:01
To:
Subject: UBC 1630.8.2.2.1.7 Bracing Load
In bracing the top and bottom flange of a steel beam, what force do I use to design the brace connection?
TIA,
T. William (Bill) Allen, S.E.
Consulting Structural Engineers
V (949) 248-8588 • F(949) 209-2509