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RE: Wood interior wall studs
- To: <seaint(--nospam--at)seaint.org>
- Subject: RE: Wood interior wall studs
- From: "Mark Deardorff" <mark(--nospam--at)rstavares.com>
- Date: Fri, 13 Jul 2007 10:43:50 -0700
I agree with you. Section 1611.5 of the 97
UBC is pretty clear.
Mark E. Deardorff, SE
R & S Tavares Associates, Inc
9815 Carroll Canyon Road
San Diego, CA 92131
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Sent: Friday, July 13, 2007 10:32
Subject: Wood interior wall studs
I just want to get some feedback
from other engineers about designing interior load-bearing wood wall studs.
When designing the walls, I normally check two load combinations:
1) DL + LL +LLr
2) DL +0.75LL + 0.75LLr + 0.75W
(with W = 5.0 psf interior horizontal partition load; I typically use a Cd=1.0
if I am just supporting floor live and dead load. And a Cd=1.15 when carrying
roof loads in addition to the floor live and dead loads. I think the use of
Cd=1.6 seems less conservative when you are dealing with large axial loads,
particularly in a multi-story buildng.)
A contractor is battling me over
some stud sizes b/c the stud height is about 10’-0” and for
2x4’s once you add the horizontal loading, in the second combination
above, it significantly reduces the axial capacity. His engineer doesn’t
check the second loading listed above.
I just want to get some other
people’s opinion on what they check in your own design.
Andrew Heigley, PE