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RE: storage racks with partially restrained moment connections - wind frame analysis in high seismic zones

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As a member of the BSSC TS 13, storage racks fall in my chapter of the
NEHRP.  This area has been a cause of concern and study.  But even more
fundamental to structural theory is how racks are used and approved.  Anyone
can take a rack originally designed and built for Dallas and assemble it in
the San Francisco area.  The inspection is a crap shoot.  If anything, the
fire marshal might inspect it to see if the racks are loaded within the
posted rating.  But whether or not the rack is in the appropriate Seismic
Design Category is neither generally posted nor generally checked.

This is an area that requires further study and work by the RMI and TS 13.

Harold O. Sprague