In a lap joint, what type of weld is a fillet weld considered?

In a lap joint, a fillet weld is indeed considered a fillet weld because it is specifically designed to join two overlapping pieces of material at a right angle or at an angle, creating a triangular cross-section in the weld. This geometry provides a strong connection that can resist shear forces effectively, making fillet welds a common choice in fabricating structures.

Fillet welds are advantageous in lap joints because they allow for easier access and can be applied from one side of the joint, simplifying the welding process. This type of weld is different from others, such as butt welds, which join pieces end to end, or spot welds and plug welds, which involve smaller areas of contact and are typically used in sheet metal applications. The unique characteristics of fillet welds are what make them suitable for lap joints in structural applications.