Name the four basic weld joint types.

Name the four basic weld joint types.

• A. Lap, corner, butt, and seam joints.
• B. Butt, fillet, lap, and corner joints.
• C. Corner, butt, fillet, and tee joints.
• D. Fillet, groove, scarf, and seam joints.

Answer: (B)

The four basic weld joint configurations describe how two pieces are joined for welding: butt, corner, lap, and tee. A butt joint brings the pieces directly in line with ends touching. A corner joint forms where edges meet at a corner. A lap joint overlaps one piece over the other. A tee joint creates a T shape with one piece welded to the side of another. Fillet is a weld type (the rounded bead used on various joints), not a separate basic joint configuration. The terms seam, groove, and scarf refer to weld methods or preparations rather than the fundamental joint types. So the correct set is butt, corner, lap, and tee.

The four basic weld joint configurations describe how two pieces are joined for welding: butt, corner, lap, and tee. A butt joint brings the pieces directly in line with ends touching. A corner joint forms where edges meet at a corner. A lap joint overlaps one piece over the other. A tee joint creates a T shape with one piece welded to the side of another. Fillet is a weld type (the rounded bead used on various joints), not a separate basic joint configuration. The terms seam, groove, and scarf refer to weld methods or preparations rather than the fundamental joint types. So the correct set is butt, corner, lap, and tee.