>
> Chuck,
>
> There was no strapping on the outside of the building, but it is
> possible that there could have been strapping on the inside. So your
> are saying that if the openings are treated like an opening in the
> diaphragm, then the height to width ratios no longer apply? Which all
> of the extra stuff to do calculate with perforated shear walls, and
> the reduction in shear capacity, is it ever really worth it to use them?
>
>
>
>
>
Take a look at Fig. 2305.3.5. You still need to consider ht./width
ratios. You need an analysis in either case--"rational" or the
"perforated shearwall" stuff in the Code. You still need hardware. Out
here in earthquake country I'm not comfortable with unreinforced
openings in the middle of my shearwalls--YMMV.
Chuck Utzman, PE
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