A study was conducted which utilized data obtained from 1056 tests of nailed joints in 18 commonly used species of southern hardwoods. The data was developed in 1950 by Scholten. This data included information regarding joint geometry, material specific gravity, discrete load-slip curves, and the ultimate load for each joint. The test specimens were laterally loaded and contained one 8d common wire nail in each joint. Joints were tested in compression at a rate of 0.07 in./min (1.78 mm/min) to ultimate load.
With a British model to predict wood embedding strength from specific gravity and nail diameter, and an estimate of nail yield strength,the European Yield Model was employed to predict the failure mode and yield load of the joints. Failure modes which create one or two theoretical plastic hinges in the nail were predicted for all joints. The data suggested that behavior modes of the joints were consistent with model predictions. Further, theoretical nail yield load showed a high correlation (r2 = 0.90) with the experimentally obtained load at 0.015 in. (0.381 mm) slip, 5% offset load, and ultimate load (joint capacity).
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