Overlap Joint, Tapered Edges (Bevelled Lap Joint)

An overlap joint with tapered edges (bevelled lap joint) is more efficient than a simple lap joint because the bevelled edge, created by tapering the ends of the substrates allow for a more even distribution of load. This reduces the concentration of stress at the joint ends and prevents mechanical lifting due to external forces catching the substrate edge. This joint is also aesthetically more pleasing than a simple lap joint.

Figure 115 Overlap joint with tapered or bevelled edges Double Lap Joint

A double lap joint is a well-balanced joint consisting of two outer substrates, each bonded to a third central body. The central body is bonded on both sides. This joint is extremely effective when the central body is subjected to bending moments; it resists the stresses on the central body. If the external supports are subject to forces perpendicular to the substrate, there may be an increase in the stresses at the ends of the external bodies where the bond line meets the central body.

Figure 116 Double lap joint

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