3.17.6 Joints with Backing
Joints with backing are joints welded from one side. Such welds must be considered where there is no
access for welding from the other side or where, if such access is feasible, the more skill-demanding
and less-productive welding in overhead position, or welder discomfort, will dictate their use.
The welding symbol designating a groove with backing shows the groove and the supplementary
backing symbols (Figure 3.49).