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Re: Seismic Design of Expansion Anchors

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In every Southern Calif. agency that I know of, we can't/don't use
expansion anchors for seismic forces. If anchors are not cast in the
concrete, we most often use epoxy anchors with special inspection.

Stan Scholl, P.E.
Laguna Beach, CA

On Fri, 22 Jun 2001 12:11:04 -0500 richard lewis <rlewistx(--nospam--at)juno.com>
writes:
> If I have calculated the load on an expansion anchor using 97 UBC it 
> is a
> strength design value.  What values do I use to design expansion 
> anchors?
>  The catalog gives allowable and ultimate level loads.  The factor 
> of
> safety is about 4 for shear and tension.  If I convert the strength 
> load
> to service level loads by UBC 1612.3.1 the conversion factor is 1.4.
> 
> What values are typically used for expansion anchors in seismic 
> design?
> 
> Rich
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