Which joint is formed by two pieces of base metal at approximately 90 degrees to each other?

Which joint is formed by two pieces of base metal at approximately 90 degrees to each other?

• A. Edge joint
• B. T-Joint
• C. Lap joint
• D. Flange

Answer: (B)

When two base metal pieces meet at a right angle, the configuration described is a tee joint. This occurs when one piece is welded perpendicular to the other at roughly mid-height, creating a “T” shape. The weld is typically along the intersection—often a fillet weld—to join the perpendicular member to the flat piece. This differs from an edge joint, where edges butt together in a line; a lap joint, where one piece overlaps the other; or a flange arrangement, which involves a flange component. A common way to visualize it is a vertical post welded to the middle of a horizontal plate, forming a T.

When two base metal pieces meet at a right angle, the configuration described is a tee joint. This occurs when one piece is welded perpendicular to the other at roughly mid-height, creating a “T” shape. The weld is typically along the intersection—often a fillet weld—to join the perpendicular member to the flat piece. This differs from an edge joint, where edges butt together in a line; a lap joint, where one piece overlaps the other; or a flange arrangement, which involves a flange component. A common way to visualize it is a vertical post welded to the middle of a horizontal plate, forming a T.