Pull-through Tests on OSB and Gypsum Board
Van Doren, M.
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The objective of this report is to provide pull-through stiffness and capacity for common fasteners used in cold-formed steel attached to oriented strand board or gypsum. A total of 35 tests were conducted at dry, humid, and normal conditions for the sheathing. The tests, which were conducted in uniaxial tension, attach the actuator to the tip of a screw and pull the fastener head through a 4 in. x 4 in. board of sheathing supported by a stiff HSS tube with a circular opening 2 in. in diameter. Mean pull-through strength in OSB is 286 lbf with an initial stiffness of 5790 lbf/in. under normal conditions but decreases for dry or humid board. Mean pull through strength in gypsum is 96 lbf with an initial stiffness of 1911 lbf/in. under normal conditions but decreases substantially for dry or humid conditions. The tested values are intended for use in the prediction of the pull-through failure mode which is commonly observed in cold-formed steel framed walls and floors with sheathing.