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Re: UBC 1997 Seismic Provisions for Steel Buildings

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I would recommend you to use chapter UBC 97 chapter 16 for the force
generation and the 1997 AISC Seismic Provisions (with Supplement No. 1, Feb
99) for the Steel design portions.  This is essentially what LA City, LA
County, Freemont etc etc have adopted.

Lanny J. Flynn, P.E., S.E.
Regional Engineer
AISC Marketing, Inc.
email: flynn(--nospam--at)aiscmail.com

-----Original Message-----
From: Eddie Gonzalez <Eagonzal(--nospam--at)ENG.CI.LA.CA.US>
To: seaint(--nospam--at)seaint.org <seaint(--nospam--at)seaint.org>
Date: Tuesday, August 10, 1999 9:36 AM
Subject: UBC 1997 Seismic Provisions for Steel Buildings


>At a recent seminar, the following items were brought up or led to my
personnal
>discovery which may worthy of discussion on this list:
>
>Item 1: Omega Factor (Seismic Force Amplification Factor) is also included
for
>calculations of equations in Division V, Sect. 2213.5.1
>
>Item 2: The term "gravity loads" in Sections 2213.6.2 and 2213.7.2.1 was
>interpreted to mean "factored DL & LL".  I personnally disagree since 1)
this
>already existed in the 1994 UBC where the loads were calculated using
working
>stress. 2) When this section (chp22) want one to use load combinations, it
>usually states it emphatically (ie. 2213.5.1).
>
>Items 3: There are two guidelines for the design of ASD.  One is at the end
of
>Part II of Div. 4 and the other is all of Div. 5. of Chap 22 of the Code.
>Which one are people using?
>
>Regards,
>ed gonzalez
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