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Re: Wood framed walls

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In my opinion:

Gypsum board is not an appropriate material for resisting racking shear.  As
pointed out the current allowable loads are 30 plf, which are ridiculous.
 Once the nail heads or screw heads break the paper cover on the wallboard,
there is really no value at all.  As for plaster, the attachments are
similarly suspect.  In both cases, the materials are very brittle.  The
current LA City requirements also place severe limiations on H/L ratios for
acceptable panels (1:1, I think.)

Conclusions:  If you have "real" loads on your wall, put some plywood on the
studs and do it right.

Bruce Resnick.