The Tongue And Groove
: AN ANALYSIS OF TENONING, MORTISING, RABBETING AND BEADING
This form of uniting members has only a limited application. It is serviceable for floors, table tops, paneling, etc. In Fig. 213, a door panel is shown, and the door mullions (B) are also so secured to the rail (C). The tongue-and-groove method is never used by itself. It must always have some support or reinforcing means.