ball of the hammer, or a fuller may be used. They are drawn out in the same manner as described for T welding, excepting that each piece has two scarfs opposite to one another, instead of
Fig. 84- Lapping Corner Scarfs
one as shown in the cross bar for T welding. The heat is taken and the pieces are lapped with one scarf under the other. When hammered, these thin scarfs lap onto the thick part of the bar and make a smooth weld.