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Re: drift calculation, 1997 UBC using ASD

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Alex:
My code (1998 CBC, first printing) says:": ... the load combiations of  1612.2 shall be used."  1612.2 load combinations are USD and do not contain a 1.4 factor.  ie Eq 12-5 or 12-6.

Bob Bossi

Alexander Sasha Itsekson wrote:

Jeff,

The section 1630.9.1 States :"A static, elastic analysis of the
lateral-resisting system should be prepared...  Where Allowable Stress
Design is used and where drift is being computed the load combination of
section 1612.3 shall be used"  That is where is divide E/1.4.

Hope this helps

INGRAHAM DEJESSE ASSOCIATES INC.

Alexander Sasha Itsekson
(510) 527-7223