Capacity of oriented strandboard joints with overdriven nails.

摘要

This article presents the results of a testing program to evaluate the capacity of oriented strandboard joints with overdriven nails. Several single nail wood joints were tested using a cyclic loading procedure. Joints were assembled with 11 mm sheathing panels, 38x89 mm wood members, and gun-driven 2.9 mm diameter by 60.3 mm long nails. Nails were flush-driven and overdriven 1.6, 3.2, and 4.8 mm. Results indicate that any level of nail overdriven depth will reduce the capacity of a joint. Compared to flush-driven joints, joints with nails overdriven 1.6, 3.2, and 4.8 mm experienced 9, 13, and 22% loss in load capacity, respectively. Approximate reductions in ultimate displacements were 22, 41, and 45% and 20, 40, and 44% in cumulative energy dissipation for joints with nails overdriven 1.6, 3.2, and 4.8 mm, respectively. Initial stiffness decreased 20% for joints with 1.6 mm overdriven nails but increased 8 and 19% for joints with 3.2 and 4.8 mm overdriven nails, respectively.