Which welding position is used for butt joints?

• A. 2F position
• B. 1G position
• C. 2G position
• D. 1F position

Answer: (B)

For butt joints, the weld method used is a groove weld, since the joint is made by fusing the ends of two pieces joined along a seam. In the flat groove setup, the plate lies horizontal and the weld is deposited from above in a position that gives you the most straightforward access to the groove and root. This makes it the standard starting point for butt joints because you can control penetration, alignment, and root fusion more easily. Other options refer to fillet welds or to different groove-weld orientations that are used in other situations, but for a basic butt joint the flat groove position is the most common and practical choice.