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Re: Unusual precast wall panels

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Steve,

Is the void between the shells grouted?  Do you know when it was built?  Is
there hardware that interconnects the wythes?  How thick are the walls?

There is a commercial building in Pasadena, a church in Pasadena, and a
residence in South Pasadena built in the 19-teens or 1920's using what was
called the Lockstone system [developed by a Mr. Lockwood]: walls are about
8" thick built with precast panels about 1-1/4" thick, that are smaller than
yours, interconnected by heavy-wire hardware, no ribs on the panels, and the
void between wythes filled solid with concrete -- the panels are like
permanent concrete forms.  It looks like URM, but was judged by the City of
Pasadena as cast-in-place concrete and not subject to their URM Ordinance.

Nels Roselund
Structural Engineer
South San Gabriel, CA
njineer(--nospam--at)att.net



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