For anyone who has already made a Tage Frid three-legged stool, I’m curious about one of Frid’s decisions. In his book, he said the tenons for the stretchers don’t have shoulders. I’ve never made anything with a tenon that has no shoulders. It seems like it wouldn’t have any (or very much) mechanical purpose. One advantage of not having shoulders is the difficulty of cutting the shoulders at a compound angle and have it be perfect with no gaps. Another advantage is the streamline look—the stretchers are allowed to be more slender at the ends. I guess i’m gun shy and fear that the stool with come apart if someone hits the leg the wrong way.
Is having no shoulder a chairmaking technique? I have definitely seen it in post-and-rung construction.
-- Mitch, http://furnitude.blogspot.com