Which joint is formed when the surfaces of two pieces are in contact and edges flush?

Which joint is formed when the surfaces of two pieces are in contact and edges flush?

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

Answer: (B)

Edge joints occur when two pieces are joined along their edges, with those edges placed in contact and flush in the same plane. The weld runs along that meeting edge, creating a straight seam along the length. This setup is described by edges being flush together, which is why it’s classified as an edge joint. In contrast, a butt joint welds the pieces together along their faces in a end-to-end fashion, not along the edge.

Edge joints occur when two pieces are joined along their edges, with those edges placed in contact and flush in the same plane. The weld runs along that meeting edge, creating a straight seam along the length. This setup is described by edges being flush together, which is why it’s classified as an edge joint. In contrast, a butt joint welds the pieces together along their faces in a end-to-end fashion, not along the edge.