WELDING THEORY - OD1650 - LESSON 1/TASK 1
FIGURE 13. BACK OR BACKING WELD SYMBOLS.
Back or Backing Welds.
(a) The back or backing weld symbol on page 9 will be used to indicate bead type
back or backing welds of single groove welds.
(b) Back or backing welds of single groove welds will be shown by placing a back or
backing weld symbol on the side of the reference line opposite the groove weld symbol (figure
13, view A).
(c) Dimensions of back or hacking welds will not be shown on the welding symbol.
If it is desired to specify these dimensions, they will be shown on the drawing.