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      I am refering to residential wood frame construction, with plywood
shear panels.
      Typically, on the plans, i see a top plate shear transfer detail that
shows a plywood panel edge nailed to the upper plate ( wood 2 x 4 ) of the
double top plate then a simpson a35 to a block above.
     While performing structural observation today i see a problem that must
be common:    The plywood panel is 8'tall-1/8". The wood wall is 8'-1" (
92-1/4" studs ). With a minimum  !/2" ( even 3/8 " ) the top edge nails are
either in the crack between the two top plates or in the bottom top plate
that may ( probably ) not have appropriate shear transfer to the upper top
plate and the a-35 above.  
     If the nails are angled, they must be over/under penetrating the plies
by the nailhead.

     Since this is such a common condition , i would appreciate any thoughts
on this detail.
     This may be hard to understand in this text but next time you observe
the top plate edge nailing of an 8' shear panel you may see what i mean.

     Tom Harris, SE
     Thousand Oaks, CA
     


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