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Re: City of San Diego and Proprietary Shearwalls

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San Diego is Seismic Zone 4.  The Simpson wall panel was not approved for use in second floor applications.  I am not sure if Simpson has finished the testing to modify their ICBO report to include two story applications, they may be acceptable now.  The Hardy frame is approved for two story applications provided the application fits all the necessary guidelines in their ICBO report.
Paul Feather
----- Original Message -----
Sent: Wednesday, August 08, 2001 10:29 PM
Subject: City of San Diego and Proprietary Shearwalls

I heard an interesting rumor that the city of San Diego was not accepting the use of Proprietary shearwalls for installation at the second floor level or above. Can someone verify if this is the case or if there is a problem with specific proprietary walls and which ones if this is the case? The only thing that I can think of is that there is the age old question related to wood shrinkage and how it might be compensated for by the proprietary panels. If this is the case, what is the difference in this problem with any ordinary plywood shearwall or metal braced frame?
Anyone in the San Diego area care to comment on this one? Also, isn't San Diego City in a lower seismic zone than the other coastal areas up to San Francisco or have the increased their city to Zone 4?
Dennis S. Wish, PE
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