Joinery / Overlapping timber joint
Lap joint
/læp dʒɔɪnt/noun
From lap, to fold or overlap.
Definition
A joint in which two members overlap. In a half-lap, material is removed from each so the joined faces sit flush.
Fig. 35 — Lap joint: schematic studyNOT TO SCALE
Illustrative study — Lap joint · AI-generatedSAMPLE IMAGE
Photo study — Lap joint · AI-generated00:06
Structural & construction notes
Lap joints are simple and provide good glue or fastener area, but removing half the section reduces strength at the joint. Common in frames and framing connections.
An educational reference. Project-specific design requires professional guidance.