What should the work angle be when welding T-joints and lap joints in the flat position?

• A. Split the angle of the joint being welded
• B. Perpendicular to the joint
• C. Align with the joint center
• D. Opposite to the joint direction

Answer: (A)

The work angle should be aimed at the bisector between the two faces of the joint. For T-joints and lap joints in the flat position, split the angle of the joint so the electrode points halfway between the two surfaces. This centers the arc and the molten pool in the throat of the joint, giving balanced heat and filler metal deposition on both sides, which leads to better fusion, a more uniform bead, and fewer defects like burning through or undercut.

Angling perpendicular to the joint or aligning to a single face tends to load one side more than the other and can produce poor penetration or an uneven bead. Aligning with the joint center or moving opposite to the joint direction doesn’t provide the same balanced control over the weld pool.