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Re: Seismic Provisions

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I called the L.A. Building department and they faxed me their revised/amended
UBC (actually CBC) Chapter 22.  As far as steel seismic design goes they have
officially adopted the June 15, 1997 AISC Seismic Provisions for Structural
Steel Buildings.  Their modifications are minimal; a few changes in definitions,
reference to chapter 16 for load combinations  and redefinition of Omega QE as

As an aside, they are currently reviewing the 1999 ACI 318 but have not (yet)
adopted it.  Same goes for PCA anchor bolt design.

Thomas Hunt, S.E.

Evan Jorgensen <EJorgensen(--nospam--at)> on 03/31/2000 09:15:19 AM

Please respond to seaint(--nospam--at)

To:   seaint(--nospam--at)

Subject:  Re: Seismic Provisions

I've heard that these provisions were recently adopted by the Los Angeles City
and Los Angeles County Building Departments in lieu of Chapter 22 of the UBC.
Can anyone confirm this?

Evan Jorgensen

____________________Reply Separator____________________
Subject:    Re: AISC Seismic provisions
Author: <seaint(--nospam--at)>
Date:       3/30/00 10:29 AM

It's nice to know that the 2000 IBC references the latest AISC Seismic
Provisions.  However, that's a future code, not adopted by any jurisdictions
yet.  The original question was concerned with the legally adopted 1997 UBC
which we are legally required to use in California until probably the middle of

Rick Drake, SE
Fluor Daniel, Aliso Viejo, CA