In AWS D1.1, which of the following is NOT considered a type of weld?

In the context of AWS D1.1, the classification of weld types includes fillet welds, butt welds, and slot welds, all of which have specific characteristics and applications.

A fillet weld is commonly used to join two surfaces at a right angle, creating a triangular cross-section and effectively providing strength in joints where members intersect. A butt weld is utilized to join two pieces of metal along edges that are aligned, which allows for high strength in linear applications. A slot weld, while less common, involves a weld made in a slot cut into one piece, essentially attaching it to another piece and finding particular uses in specialized applications.

On the other hand, a spot weld is a type of weld used primarily in sheet metal applications, where the weld is localized to a very small area and is made by melting the base metal with a current at two contact points. While spot welding is indeed a recognized welding method in general practices, it is not classified as a type of weld in the same direct manner as the others listed. This distinction helps emphasize the specific structural applications that AWS D1.1 outlines for various weld types, focusing on those that directly fit the criteria for structural welding.