Shoulder butt joint

A considerable improvement over the plain butt joint is the shoulder butt joint (Fig. 610). It is formed in the same manner as a plain butt except that the overlapping panel is notched to

Fig. 608. Another useful machine for curved work is the power jig saw. (Courtesy Delta Power Tool Div., Rockwell Manufacturing Co.)

receive the end of the other panel. As you can see, panel 1 now bears against two surfaces, forming an L in the end of panel 2, instead of a single flat surface. This considerably increases the strength of the joint and also improves the appearance since much less of the end grain of panel 2 is left showing. This joint is not really much more complicated to make than a plain butt. The notches can be made on a table or a swing saw. They can even be made with a portable rotary saw since it is adjustable for depth of cut, but the problem remains of accurate guidance of the saw. Your solution will again be to clamp on a guide strip.

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