The bending moment resistance of single-dowel corner joints in case construction

This study was carried out to obtain background information concerning the bending moment resistance of single-pin dowel joints in particleboard and also to provide the background information needed to formulate expressions for predicting the bending moment resistance of single-dowel, L-type, corner joints in particleboard. Test results indicated that the bending moment resistance of the single-dowel corner joints increased significantly as dowel diameter increased from 1/4 to 3/8 inch and as the depth of dowel embedment in the face member increased from 1/4 to 5/8 inch. Changes in depth of embedment in the edge member from 3/4 to 1-1/2 inches, however, had no effect on bending moment resistance. Single-dowel corner joints loaded in tension had slightly higher ultimate bending moment resistances than the joints loaded in compression. In the compression tests, the dowel withdrew from the edge member in a few cases when the depth of dowels in the edge member was 3/4 inch. In the tension tests, the edge member split when the depth was 3/4 inch. In order to obtain the maximum bending moment resistance, therefore, a conservative embedment depth of 1 inch is suggested as an optimal value for dowel embedment in the edge member. In general, the bending moment resistance of the joints in compression and in tension could be predicted by means of two equations.

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