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RE: 2x4 stud walls in High Wind areas
- To: "'seaint(--nospam--at)seaint.org'" <seaint(--nospam--at)seaint.org>
- Subject: RE: 2x4 stud walls in High Wind areas
- From: Michael Bryson <MBryson(--nospam--at)mhpse.com>
- Date: Mon, 9 Dec 2002 10:15:23 -0800
What wind deflection criteria are you using? I would be
tempted not to use the full wind load when checking for serviceability
i.e. use a 30 or 10 year wind load instead of a 50 year wind and check it
against L/360 or L/240 deflection.
Also, are you sure you are required to use Exposure C?
I'm in 85mph exp C country
and have a contractor wanting to build a home with 2x4 at 16" oc walls, with
10' plate height. I have about 550 plf down (DL plus snow). I can get close
on the stress, but deflection is killing it, especially with a stucco
finish. I'm getting the usual, " The last engineer I used had no problem
with it". Contractors look table 23-IV-B in the '97 UBC and see that a 2x4
wall should go 10' supporting one floor and the roof. I realize that
this table does not apply in high wind areas, which I am in, and that it's
the 85 mph wind that is killing the 2x4.
I'm looking for some input
- have others found a way to get a 10' (plate to plate) 2x4 wall to