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Re: Using Wood-Framed Conventional Construction as a Lateral Shear Resisting ...

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In a message dated 3/6/2008 9:58:26 A.M. Pacific Standard Time, terry(--nospam--at) writes:
Hi everyone;
    I have an question which seems to keep coming up year after year.
    We often have clients who's residential project has been plan
checked by a local building department and one wall line does not comply
with the lateral provisions of 2007 CBC (2006 IBC) Section 2308 for wall
bracing.  Consequently, we do a lateral analysis for this one wall line.  I
assume this is standard operating procedure so, with this as an
introduction, let me get to my question.
    The CBC/IBC Section 2308.2.3.3 says an engineered analysis is
required when the Snow Load exceeds 50 psf.  Most jurisdictions allow a 75%
reduction in Snow Load for Seismic design (yes-it varies by jurisdiction).
So, if I run lateral calculations to show that Wind Load governs over
Seismic Loads for these heavy snow load areas, can I use the Conventional
Construction provisions as my lateral shear resisting design/detailing
element OR do I need to run full-blown lateral calculations for the building
as a whole?
    I am finding more and more that engineering offices are running full
blown lateral calculations without further discussion.  What does your
office do?

Terry Weatherby
How are you Terry
Hope the wife and kids are doing well..are the kids away at school these days.
Our office will only evaluate a complete building. Our insurance will not allow partial involvement. The gray area would be attached patio's.
Joe Venuti
Johnson and Nielsen
Palm Springs,  CA
Joe Venuti
Johnson & Nielsen Associates
Palm Springs, CA