noun
lap joint
Technical term in architecture and woodworking for a joint where two pieces overlap and are fastened together.
この木造建築では、梁の接合に重ね継手が使われている。
In this wooden building, lap joints are used for connecting the beams.
Compound of 重ね (kasane, 'overlapping') + 継手 (tsugite, 'joint'). The spelling 継手 is a standard term for a joint in woodworking or metalworking.