NRCA has just completed limited testing of nail pull-out
resistances in plywood and oriented strand board (OSB) roof
sheathing. The purpose of the testing was to determine the
influence specific fasteners and sheathing thicknesses have on the
pull-out values for nails used to attach asphalt shingles.
NRCA obtained sheets of three thicknesses of plywood sheathing
and three thicknesses of OSB sheathing for the testing. All the
sheathing was obtained through typical distribution sources and
labeled as being exterior-grade, performance-rated products
suitable for roof sheathing applications.
NRCA also obtained quantities of two commonly available 1
1/2-inch- (38-mm-) long, hand-driven shingle nail types: a
ring-shank shingle nail complying with ASTM F1667, "Standard
Specification for Driven Fasteners: Nails, Spikes and Staples," and
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