What is the minimum allowable overlap for a single-lap sheet splice using a double row of 1/8-inch rivets on aluminum skin?

In the context of sheet metal work, especially concerning the use of rivets for splicing metal sheets, the minimum allowable overlap is critical for ensuring the structural integrity of the assembly. A single-lap sheet splice typically requires that the overlap is sufficient to distribute loads effectively and to provide adequate strength against shear forces.

For aluminum skins, using a double row of 1/8-inch rivets, the minimum overlap of 13/16 inch is established based on industry standards and practices. This overlap size ensures that there is enough surface area for the rivets to grip, which is crucial when considering the load-bearing capacity of the joint. A larger overlap can distribute stresses more effectively, minimize the risk of failure, and ensure that the rivets are properly engaged with both sheets involved in the splice.

The choice of 13/16 inch as the correct answer reflects the need for a balance between sufficient overlap to maintain structural integrity while avoiding excessive material usage that may add unnecessary weight or complexity to the design. This overlap measurement aligns with typical guidelines outlined in technical manuals and industry standards related to aircraft assembly and sheet metal work.