Question: A 1 4 ' ' 1 2 ' ' lag screw that has a 3 ' ' thread is used to attoch an L -

A 14''12'' lag screw that has a 3'' thread is used to attoch an L-bracket to an asphalt-shingle roof. If the combined
thickness of the L-bracket, shingles, and roof membrane is 14 inch, and if the screw penetrates directly into a roof truss
made of Southern Yellow Pine, into a properly sized pilot hole, then the withdrawal resistance will be closest to
a.632 pounds
b.773 pounds
c.843 pounds
d.984 pounds
A 1 4 ' ' 1 2 ' ' lag screw that has a 3 ' '

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