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Re: Lag Screws -- Shear Capacity in plywd

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> "Nels Roselund, SE" wrote:
> I want to make a Shear/Tension connection of a steel fixture to an
> existing plywood sheathed wood floor.  The points and threads of the
> lag screws will be embedded in wood blocking under the plywood
> sheathing -- tension will be developed into the blocking, which will
> be connected to the floor joists by framing clips.  Shear will be
> developed into the sheathing by the lag screw shank where it passes
> through the plywood.  Are there any published values or tests for this
> kind of installation?  Or as least for the shear -portion of this kind
> of installation?

APA has some literature on screws for metal to plywood connections in
publication E830C, dated December 1995.
 Not sure if this will help.  Also, the 2001 NDS has dowel bearing
values for plywood in Table 11.3.2B.

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