The impact strength, set, and elastic response of particleboard decking glued-nailed to simulated floor panels was determined under a sandbag drop test. The results of these tests on several commercial structural particleboards were not found to be closely correlated to static bending properties or to impact tests on smaller panels held in a steel frame. A linear prediction equation was developed for relating the results of a toughness test to the impact strength as determined by a 60-pound sandbag. This equation is applicable only to small-particle layer-type board. Boards with different furnish types exhibit different toughness-sandbag strength relationships. The toughness values were determined from a 3-inch-wide specimen by use of a modified FPL toughness tester. Toughness was closely related to board type. The average toughness values (in. lb.) ranged from 103 to 53 for the commercial boards tested, while the MOR for these boards ranged from 3,340 to 2,930 psi. The elastic deflection of boards under impact was compared to plywood. Plywood deflection under impact was 65 percent to 90 percent of that for the various types of particleboard evaluated.
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