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Fw: UBC97 STORY DRIFT LIMITATION

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The UBC97 drift limitation you are talking about is for MAXIMUM deflection
(elastic+inelastic) expected during an actual EQ.  The UBC94 drift
limitation you are referencing is for deflection under (reduced) design
level forces, which is likely to be just elastic deflection.  Therefore, the
UBC94 requirement is a lot smaller than the UBC97 requirement.

Hope this helps.

T. Eric Gillham PE



-----Original Message-----
From: Mvpsc(--nospam--at)aol.com <Mvpsc(--nospam--at)aol.com>
To: seaint(--nospam--at)seaint.org <seaint(--nospam--at)seaint.org>
Date: Wednesday, December 09, 1998 8:50 AM
Subject: UBC97 STORY DRIFT LIMITATION


>Hi everyone!
>I am designing a three story office building based on 1997 ubc.
>per section 1630.10.2 story drift shall not exceed .025 times the story
>height.
>this is five time the allowable per 1994 ubc(.005 x ht).
>Am I missing anything?
>any comment or suggestion?
>
>
>