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
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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