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# RE: Coupled Timber Shear Walls

• To: <seaint(--nospam--at)seaint.org>
• Subject: RE: Coupled Timber Shear Walls
• From: "Thor Tandy" <vicpeng(--nospam--at)telus.net>
• Date: Fri, 20 Aug 2010 14:09:57 -0700

```Hi Joe.

Sort of.  I looked at that but since the wall is a demising wall as well as
a shear wall, I can make it work with a series of chords and straps to carry

I was looking for an equation that would give me the expected deflection for
such a wall.  I found an article that suggest that a perforated shear wall
will have deflection behaviours similar to a segmented wall.  Since my
"lintel/coupling beam" is as large as the legs I'm not convinced that is
true.  I can do an analysis assuming no nail slip or anchor displacement but
it's the nail slip that determines the rigidity ... and I'm not sure that
the standard deflection equation is correct for this case ...

Thor

-----Original Message-----
From: Joe Venuti [mailto:jovenengr(--nospam--at)verizon.net]
Sent: Friday, August 20, 2010 10:08 AM
To: seaint(--nospam--at)seaint.org
Subject: RE: Coupled Timber Shear Walls

Thor
Is what you are describing similar to a Simpson single portal frame at a
garage door with the beam over the wall and bears on post at other end ?

Joe Venuti,  P.E.
Joven Engineering
La Quinta,  CA
jovenengr(--nospam--at)verizon.net

-----Original Message-----
From: Thor Tandy [mailto:vicpeng(--nospam--at)telus.net]
Sent: Friday, August 20, 2010 8:44 AM
To: SEAInt
Subject: Coupled Timber Shear Walls

I'm looking at trying to use a timber framed portal as a coupled shear wall.
The leg and "coupling beam" are of similar dimensions.

The standard deflection formulae are for single cantilevered shear walls.

Does anyone have (or can direct me to) a deflection equation for coupled
timber shear walls?

TIA

Thor A. Tandy P.Eng, C.Eng, Struct.Eng, MIStructE
Victoria, BC

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