half lap joint between parallel boards
A woodworking joint where the edges of two parallel boards are notched to overlap, creating a flush surface. Technical carpentry term.
When you join floorboards with a half lap joint, gaps are less likely to appear.
The side panels of this shelf are assembled with half lap joints.
Standard kanji spelling for this carpentry term.
Variant spelling using 合 instead of 相.
Abbreviated spelling; less common.
Abbreviated spelling; less common.
Compound of 相 (ai, 'mutual') and 決り (jakuri, 'notch, groove'), referring to the interlocking nature of the joint. The exact historical derivation is uncertain, but the term is established in traditional Japanese carpentry.