Which of the following would be the best description of an edge joint?

• A. Lap joint
• B. Edge joint
• C. Butt joint
• D. Fillet joint

Answer: (B)

An edge joint is described by two pieces meeting along their edges, with the weld placed along that edge to join them. This setup is used when the edge of one piece aligns with the edge of another, creating a seam that runs along the edge line, often on thin sheets.

This matches the concept of an edge joint because the emphasis is on how the pieces come together—edge to edge—with the weld along the edge itself. In contrast, a lap joint involves one piece overlapping another, a butt joint has ends that come together in the same plane, and a fillet joint welds a corner where two surfaces meet at a right angle.