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Re: California Building Code--Em

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Em is simply the Eh "Strength level earthquake force, horizontal component" multipled by Omega sub zero "Seismic Force Amplification Factor" in Table 16-N. It?s a design requirement in many sections of California Building Code and is not limited to discontinuous LFRS.

Regards
Casey (Khashayar) Hemmatyar, P.E.
California



From: David Topete <davetopete(--nospam--at)yahoo.com>
Reply-To: <seaint(--nospam--at)seaint.org>
To: seaint(--nospam--at)seaint.org
Subject: Re: California Building Code--Em
Date: Tue, 10 Aug 2004 14:11:42 -0700 (PDT)

Mike,
From what I've finally been able to figure out, E_m is only required where you have a discontinuous LFRS (e.g. shearwall over a beam, or connections of collectors to LFRS). Other than that, I don't believe it is specifically called out.
HTH.
David Topete, PE
SF, CA

"Michael L. Hemstad" <hemstad.ml(--nospam--at)tkda.com> wrote:
All,
Aside from Section 1630.8.2.1, can anyone tell me where else the
Estimated Maximum Earthquake Force Em is invoked?

Thanks,

Mike Hemstad
TKDA
St. Paul, Minnesota

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