Three Tests on Nailhead Performance in Wood-Base Panels

The effectiveness of three test methods in determining nail-head performance values in four commercial wood-base products, using two types of nails, was determined. There was no significant difference between two average test and the new nail-head push-through test, with any of the four types of materials or two types of six-penny box-head nails used. There was no statistical significant difference among all average nail-head performance values obtained from the three test methods when six penny box head common nails were used in the first two tests. In comparing the three tests, the new nail-head push-through technique appears to be a simpler test method, than the standard nail-head pull-through method. The new test is fast and reliable. It can also be used to test wood-base products which have a wide range of thickness, density, and strength properties, without the problems of drill chuck or tension grip wear and nail-grip slip problems encountered in the standard pull-through test. The 1/4-inch rod punch-through test was by far the simplest and fastest among the three tests. It provides a relatively quick and reliable indication of the nail-head performance of six penny common nail for the wood-base material, and could be adopted for use as a routine quality control technique to determine nail-head property in the manufacture or use of wood-base siding and sheathing panel products.

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