Finger Joint Feasibility in Furniture Production

A series of exploratory tests were conducted using white pine and yellow-poplar to determine utility of finger joints in the end-to-edge grain typical of the furniture joint. A slope of 3.25:1 and a finger tip width of 0.005 inch were found to be statistically stronger than other combinations tested. Joints made with finger lengths of 0.1875, 0.3125, and 0.375 produced satisfactory joints when tested in static bending, block shear, tension perpendicular to the joint face, and shear perpendicular to the joint face.

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