Which type of weld is typically used for connections in structural welding?

The fillet weld is typically used for connections in structural welding due to its versatility and ease of application in joining two materials at an angle, such as the corners or edges of structural steel components. Fillet welds can be applied in various positions and are particularly effective in situations where the joined pieces do not fit together perfectly, making them ideal for the fabrication of frames and supports in structural applications.

Their geometric shape creates a triangular cross-section that allows the weld to distribute stresses effectively across the joint. This is critical in structural applications where strength and durability are paramount. Fillet welds can accommodate differences in thickness between the members being joined, which is common in structural construction.

In contrast, butt welds are often used when joining two pieces of metal end-to-end, providing a strong joint but requiring more precise alignment. Overlay welds are typically used to enhance surface properties, and spot welds are usually employed in thin materials or assembling components in manufacturing but don’t provide the same strength or versatility required in structural applications. Thus, the fillet weld stands out as the most appropriate choice for structural connections.