Vertical Position (3F Or 3G)
In vertical position welding, the axis of the weld is approximately vertical.
When welding is done on a vertical surface, the molten metal has a tendency to run downward and pile up.
The flow of metal can be controlled by pointing the flame upward at a 45 degree angle to the plate, and holding the rod between the flame and the molten puddle (see above).
The manipulation of the torch and the filler rod keeps the metal from sagging or falling and ensures good penetration and fusion at the joint.
Both the torch and the welding rod should be oscillated to deposit a uniform bead. The welding rod should be held slightly above the centerline of the joint, and the welding flame should sweep the molten metal across the joint to distribute it evenly.