angled half-dovetail half lap joint with notched heel

The angled half-dovetail half lap joint with notched heel is an asymmetric L-connection combining a dovetail-shaped expansion with an additional shoulder. The connection belongs to the dovetail, offset, and lap joint families.
This joint shows relationship to the dovetailed lap joint with shoulder and bevelled step joints. Comparable principles appear in Japanese ari-kake connections and European bevelled shoulder joints.
The characteristic feature combines dovetail-shaped expansion on one side with additional offset for improved load bearing. The dovetail prevents withdrawal in the longitudinal direction, while the offset provides bearing support. The one-sided design reduces cross-sectional weakening.
The connection offers high tensile strength through dovetail locking and improved shear strength through the offset. The asymmetric design protects the main member and requires no additional fasteners. However, the offset leads to more complex manufacturing and can create weak points with inaccurate fits.
The mechanical function relies on positive dovetail locking and force-fit bearing support through the offset. The dovetail transfers tensile forces while the offset absorbs shear and compression forces.
Application includes diagonal braces in roof and wall structures, post connections and corner bracing. In historical timber frames, it serves brace-to-rail connections. Modern use encompasses bracing in timber frame construction and furniture structures.
Manufacturing requires precise marking of the dovetail geometry and offset. The dovetail angles must consider grain direction to prevent splitting. The offset is executed as a shoulder or beveled surface.