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latest AISC Code of Standard Practice / Seismic Concentric Braced Frames

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The "Latest" Seismic Provisions are 1997, and are available as a supplement
until the Third Edition of LRFD comes out.  There are a couple of changes in
there that reflect the Northridge earthquake loads for Braces.  One of them
is the factor for connection design which could have you bumping up the size
of your gusset plates and connections to take loads in tension of Ry*Fy*Ag
where Ry is not .9 as in the design manual, but 1.5 for A36 and 1.1 for
Grade 50 material.  See Section 6.2 and section 13.3a of 1997 Specs. 

I would like to discuss with anyone who has some experience in this area
concerning the design of the braces and connections.  The 1997 Seismic
provisions seem to be placing some extended conditions on gusset plate size
and loads.  I could use a reference for the Whitmore Section and whether it
can extend into the web of the connecting beam as shown in the Connections

-----Original Message-----
From: Scott E Maxwell [mailto:smaxwell(--nospam--at)]
Sent: Thursday, May 18, 2000 10:49 AM
To: seaint
Subject: Re: easy one - latest AISC Code of Standard Practice?

The latest I have in the my 2nd edition LRFD which was effective as of
June 10, 1992.

I did find it on the AISC web page and the June 10, 1992 seems the be teh
most current...follow the link below to what I found:

Hope this helps,

Scott Maxwell

On Thu, 18 May 2000, KSP wrote:

> What is the current edition of the AISC Code of
> Standard Practice for Steel Buildings and Bridges?  I
> tried looking on the AISC site but had trouble finding
> it.  The one I have says that it was Adopted Effective
> June 10, 1992.
> Thanks,
> Ken Peoples
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