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RE: Plywood Roof Diaphragm Connections

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I typically block every other truss space so that we can also meet the 
venting requirements. Bridging is a good idea, but I see no load rating 
listed. The drawback is that there really is no perimeter collector member 
to take the shear out of the diaphragm except the fasteners at each truss.

Jim K.

-----Original Message-----
From:	Zachary Goswick [SMTP:ZachG(--nospam--at)angusyoung.com]
Sent:	Wednesday, October 17, 2001 2:47 PM
To:	'seaint(--nospam--at)seaint.org'
Subject:	Plywood Roof Diaphragm Connections

I have a question regarding plywood roof diaphragms.  I have a wood truss
roof that has a 4'-0" overhang around the sides of the building.  At the
location of the wall, the truss depth is about 2'-0".  What methods are 
used
to transfer the load from a roof diaphragm down to the shearwall when wood
truss roofs with deep heel depths are used?  I have fully blocked from
bearing plate up to the top of the trusses and put 3" holes in the blocking
in the past, but I am looking for other options.  Has anybody used tension
bridging such as the Simpson strong tie LTB or TB to transfer this load?

Zachary Goswick
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