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RE: Screws for Use in Plywood Shearwalls

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I would think that you could use the lateral load capacity of wood
screws per NDS, and pick a screw (and spacing) that is equivalent to the
nailing pattern required (by the charts) for the load.

Charles F. Espenlaub, III, P.E. 
Martin-Espenlaub Engineering 

-----Original Message-----
From: MJL Engineering Ltd. [mailto:mjleng(--nospam--at)]
Sent: Friday, February 11, 2000 2:28 PM
To: seaint(--nospam--at)
Subject: Screws for Use in PLywood Shearwalls

We are presently designing a plywood shearwall system which would
utilize 2 1/2" 10d nails  into a 2" x 4" stud. The owner has requested
that screws be utilized in lieu of nails. 
I do not have any charts giving comparisons of screws for use in
shearwalls. We have charts from NER-72 which compare staples and nails
but there is no values for screws.
Does anyone know where I could look for this information on screws?
Jamie Lawson P.Eng.
MJL Engineering Ltd.
Abbotsford, BC, Canada