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Re: Redundancy Factor

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A great idea but there imay be no legal way to do what you
suggest. California law prohibits local jurisdictions from
making "less restrictive" ammendments to the UBC and there is
no state agency that can amend the code on a state wide basis
for low rise wood frame.  The only possible action would be to
convince the state Department of Housing and Community
Development to repeal their adoption of 1997 UBC Chapter 16 (or
16 - 23) and readopt the the 1994 code in its place but this
would effect only residential occupancies.

Lynn H wrote:

> For now, this post only refers to small (3 stories
> or less, less than 10,000 sq. ft.) light wood framed
> residential and commercial buildings.
> In light of the convoluted mess the rigid diaphragm
> analysis requires, and the recent disclosures about
> the new Code Rho factor, I am recommending that
> local building officials adopt an amendment to the
> 1997 Code allowing seismic design to conform to the
> requirements of the 1994 UBC until this mess has
> been cleared up.
> I am going to write a letter to the City and County
> of Santa Barbara, and City and County of Ventura
> (where we do most of our work)  asking them to take
> this or some similar action.
> In the mean time, I will be writing a letter to John
> Shipp of SEAOC asking for SEAOC to issue an official
> written position on the 1997 UBC seismic design as
> it applies to light wood framed structures.  I will
> be asking for wording that will allow building
> officials to adopt the SEAOC position letter in lieu
> of certain sections of the Code.
> SEAOC should consult with SEVERAL members who are in
> regular business practice of doing this kind of work
> in putting together this position statement.
> There is MASS CONFUSION right now in the structural
> engineering community on these issues, and I expect
> SEAOC to step up and deal with this matter as soon
> as possible.  This is not the time to hunker down in
> the bunkers.
> For those of us in practice doing the design of
> light wood framed structures, this is a very
> important issue.
> Leaders, please LEAD!
> Lynn