Which number and letter combination does the AWS assign to the overhead welding position?

The overhead welding position is designated by the American Welding Society (AWS) as the combination of the number 4 and the letter G, which corresponds to the 4G position. In welding, the designation system helps to standardize the various welding positions for procedures and qualifications. The overhead position indicates that the welder must work below the joint to be welded, which can be particularly challenging due to the effects of gravity on the molten weld pool. This position requires a high level of skill because it involves greater difficulty in controlling the weld bead and preventing issues such as slag inclusion or porosity that can occur when welding overhead. Understanding these designations is essential for both welders and those involved in the inspection and certification processes.