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Re: drywall type shearwalls- l

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We DO NOT use drywall as shear walls.  Our understanding is that
it can help for wind loads, but is virtually useless for seismic.  I believe
APA did some testing awhile back, and this was their finding.

Dan Goodrich, P.E.


----- Original Message -----
From: "dcarroll" <dcarroll(--nospam--at)bfmengr.com>
To: <seaint(--nospam--at)seaint.org>
Sent: Wednesday, March 07, 2001 8:42 AM
Subject: drywall type shearwalls- l


> In the past, we have always used plywood or metal strap brcg for
> shearwalls--
>
> But now we have a project where we HAVE to use drywall on metal studs as
The
> Shear Resisting system .
>
> So my questions  run like this:
>
> 1.  How many Structurals out there feel comfortable using drywall for
> lateral (shear) resistance ?   {esp for seismic forces?___}
>
> 2.  ICBO lists tables where 100 plf seems to be a typical value :    a) Is
> this conservative or "liberal"?__________
> b)  Doesn't aspect ratio influence this number?_________?           c)
What
> is the best design aid/reference for this system?
>
> 3.  Is metal stud stronger or no different from wood stud?
>
> 4.  Table seems to be based around wood studs using "cooler" nails--
what's
> this ??
>      I have metal studs-- I assume  ordinary drywall screws are OK?
>
> 5.  Are there some (major) unwritten Do's and Don'ts with this system?
>      (I will put this into a spec--   Does anybody have spec or design
expl
> they can fax me ?/
>           my fax is 859_278-6060 attn David )
>
>
> Thanks in advance for ANY input--
>  P.S.  I need it ASAP
>
>
>
>
>