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drywall type shearwalls- l

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I do not recommend that drywall be used for lateral resistance.

The values in the code are liberal.  Note that the resistance deteriorates
very rapidly.

There are real concerns regarding the workmanship of the installers.  It is
my experience that drywall installers are not big fans of using drywall as
a shear resisting element.

Mark Gilligan


>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








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From: "dcarroll" <dcarroll(--nospam--at)bfmengr.com>
To: <seaint(--nospam--at)seaint.org>
Subject: drywall  type shearwalls-  l
Date: Wed, 7 Mar 2001 10:42:45 -0500
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