Plywood-to-plywood wood screw lateral capacity

[bagigio]

I have a 20"x20"x1" thick plywood panel that is connected to a 3/4" plywood skirt. (6)-6 GA screws are connecting the two pieces of assembly (screw tip is 1/2 into the 3/4" thick skirt. What is the screw design value for single shear connection, and what is the plywood-to-plywood shear capacity (is there a table in the NDS showing the plywood crushing capacity?). See attachment for description of the connection.

thank you in advance for the responses.

 

[woodman88]

NDS (2001) Table 11.3.2B gives the dowel bearing strengths and specific gravity for Structural Panels. Table 11L gives some wood screws shear values. But, I would not accept this connection as it has only 1/2" embedment into the main (3/4" ply) member.

Garth Dreger PE
AZ Phoenix area

 

[lsmfse]

try this.