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Re: Alternate Wind Provision

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James,

Thank you for your Information Bulletin.

I am *amazed* that the "stealth" wind load provisions managed to become law without a hint of their impact on the practicing Structural Engineer, but once they became effective it appears to *nobody* really understands them, they require enormously greater effort for minuscule, if any, improvement in the end result.

How did this happen?

Ralph Hueston Kratz, S.E.
Richmond CA USA

In a message dated 2/14/08 11:02:08 PM, sylai(--nospam--at)sbcglobal.net writes:
Information bulletin:
 
For those who are interested on wind design procedure, we have two parallel versions of proposed code changes (items S84 and S85) submitted to ICC, and will be heard by the ICC Structural Committee in the Code Development Hearing at Palm Springs later this month. Both versions have been development by the Tri State Wind committee with delegates appointed by their respective structural engineers association from California, Oregon and Washington. The alternate design procedure conforms to ASCE 7 Chapter 6 Method 2, but greatly simplified by tabulating net pressure coefficients for MWRFas well as for components and claddings. The main difference between the two versions is the format of the net pressure coefficient table very much similar to UBC 1997 in format.
 
The proposal from SEAOC Wind Ad Hoc committee is now incorporated and adopted as an Interpretation of regulation under the California Division of State Architects which has juridiction over K-12 and community colleges. The provision is call IR 16-7. Those interested may view it under:
 
 http://www.documents.dgs.ca.gov/dsa/pubs/IR_Manual_updated_12-19-07.pdf 
 
James Lai, F.SEAOC
Chair, SEAOC Building Code Committee
 



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