Which basic weld joint type is formed when two pieces meet at a right angle and are welded along the outer edge?

Which basic weld joint type is formed when two pieces meet at a right angle and are welded along the outer edge?

• A. Lap
• B. Butt
• C. Corner
• D. Fillet

Answer: (C)

When two pieces meet at a right angle and are welded along the outer edge, you’re looking at a corner joint. This arrangement forms an external corner shape (an L), and the weld is placed along that outer seam to join the pieces together. It’s a common way to connect two members that form a corner, and fillet welds are typically used to fill the corner because they effectively bridge the two surfaces at a 90-degree angle. This differs from a butt joint, where edges come together in the same plane; a lap joint, where one piece overlaps the other; and the term fillet describes the shape of the weld used, not the joint itself, though fillet welds are often used on corner joints.

When two pieces meet at a right angle and are welded along the outer edge, you’re looking at a corner joint. This arrangement forms an external corner shape (an L), and the weld is placed along that outer seam to join the pieces together. It’s a common way to connect two members that form a corner, and fillet welds are typically used to fill the corner because they effectively bridge the two surfaces at a 90-degree angle.

This differs from a butt joint, where edges come together in the same plane; a lap joint, where one piece overlaps the other; and the term fillet describes the shape of the weld used, not the joint itself, though fillet welds are often used on corner joints.