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Re: Plywood diaphragms

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>From what I remember, Gerard is right.

Bear in mind that the values for shear walls are based on an 8'x8' panel,
and aspect ratio does influence these results.  I just saw some test results
from some 4'x8' panels at the University of Utah.  From what I remember, the
UBC published values are plenty conservative for 1:1 aspect ratio, and get
less conservative somewhat quickly with higher height:width ratios.

Conrad Guymon, P.E.

----- Original Message -----
From: "Gerard Madden" <gmadden(--nospam--at)duquette-eng.com>
To: <seaint(--nospam--at)seaint.org>
Sent: Wednesday, December 26, 2001 2:35 PM
Subject: RE: Plywood diaphragms


> Off the top of my head, I believe the FOS from the APA tests ranges from
4.0
> to 6.0 (i.e. Ultimate Failure/Code Allowable Value)
>
> for exact numbers, reference the APA Reports.
>
> -gerard
> SJ, CA
>
> -----Original Message-----
> From: Mark Pemberton [mailto:Markp(--nospam--at)lbdg.com]
> Sent: Wednesday, December 26, 2001 1:21 PM
> To: 'seaint(--nospam--at)seaint.org'
> Subject: Plywood diaphragms
>
>
> Does anyone know off-hand what safety factor is used in determining
> the allowable wood diaphragm shear as tabulated in the UBC?
>
> Mark Pemberton, P.E.
> Project Engineer
> Lionakis Beaumont Design Group
> 1919 19th Street
> Sacramento, CA 95814
> Phone: (906) 558-1900, ext. 300
> Fax: (916) 558-1925
> www.lbdg.com
>
>
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