64 Modern Welding welds are to be made away from the shop, a fi eld weld symbol is used, as in Figure 3-35, view D. On the print, the fi eld weld symbol is a small fl ag located at the arrow end of the reference line. The fi eld weld symbol may be drawn above or below the reference line. Refer to Figure 3-22. If a weld is to be made in the shop, the fi eld weld symbol is not used. 3.5.10 Multiple Reference Lines When a sequence of operations is to be performed, two or more reference lines may be used. The reference line nearest the arrow indicates the fi rst operation. The last operation to be performed is on the reference line furthest from the arrow. See Figure 3-36. Figure 3-35. Weld-all-around and fi eld weld symbols. Note the 0.3″ fi llet in D and E is welded in the fi eld. It is welded all around the angle iron both front and back. 1/4 0.3 Weld-all-around symbol 1/4″ fillet welded all-around 0.3″ fillet welded in the field (on site) and all around (front and back) Field weld symbol Weld-all-around symbol Perspective view A B C D E Figure 3-36. Use of multiple reference lines. A—Three reference lines are used. The fi rst weld is a backing weld. The second operation is to perform the bevel-groove weld. The fi nal operation is a contour fi llet weld. Note that no sizes were used in this example. B—The completed joint. Third weld First weld Second weld A B
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