Lap joint

With respect to wood joinery, this joint, where two long-grain wood faces are joined with glue, is among the strongest in ability to resist shear forces, exceeding even mortise and tenon and other commonly-known "strong" joints.

[1] With respect to metal welding, this joint, made by overlapping the edges of the plate, is not recommended for most work.

Use for: The main difference between this and the basic half lap is that the joint occurs in the middle of one or both members, rather than at the end.

Use for: This is a lap in which the housing has been cut at an angle which, resists withdrawal of the stem from the cross-piece.

Use for: The mitred half lap is the weakest version of the joint because of the reduced gluing surface.