60 Modern Welding When a bevel-groove or J-groove weld is used, only one piece of metal is cut or ground. The arrow at the end of the welding symbol is bent along its length to the left or right to point to the piece that is to be cut or ground. See Figure 3-26, view D, and Figure 3-27, view A. 3.5.5 Contour and Finish Symbols The shape or contour of the completed weld bead is shown on the welding symbol as a straight or curved line between the weld symbol and the fi nish symbol. The straight contour line indicates that the weld bead is to be made as fl at as possible. The curved contour line indicates a normal convex or concave weld bead. See Figure 3-27. If the weld is not to remain in an “as welded” condition, a fi nish symbol is used on the welding symbol. See Figure 3-27. The fi nish symbol indicates the method of fi nishing. A surface texture or degree of fi nishing may also be added if required. If all welds are to be fi nished in the same manner, a note on the drawing may indicate the fi nish used. Users of the fi nish symbol may create their own fi nish symbols. The American Welding Society lists the following fi nish symbols: C: Chipping G: Grinding M: Machining R: Rolling H: Hammering 3.5.6 Depth of Bevel, Size or Strength, and Groove Weld Size The “S” position on the welding symbol indicates the depth of bevel or the depth of preparation for a groove-type joint. Information in the “S” position may also indicate the size or strength of certain welds. The size of a fi llet weld is the length of the legs (sides) of the triangle that can be drawn inside the cross section of the fi nished weld, as shown in Figure 3-28. The lengths of the legs on a typical fi llet weld are equal, so only one dimension is given in the “S” area of the welding symbol. If the fi llet weld has unequal legs, the size of each leg is shown in the weld symbol. The weld shape of this fi llet weld may be shown on the part drawing to indicate which is the short leg. See Figure 3-29. Weld size or strength information is also required for resistance spot or seam welds, electron beam Figure 3-26. Root opening and groove angle. A and D show the weld symbol for a groove weld. B and E show the pieces cut and set up for welding. C and F show the completed weld. Note that the bend in the arrow at D points to the left piece, which is the part to be cut or machined. Root opening Groove angle A B C D F E 30° 60 45 60° 45° 1/8 1/8″ 1/16 1/16″ Figure 3-27. Weld contour and fi nish symbols. In A, C, and E, contour and fi nish symbols are shown on the welding symbol. B, D, and F illustrate the shape and fi nish of the completed weld face. Weld Contour and Finish Symbols C C 45 Contour symbol Finish symbol 1/16 Contour symbol Finish symbol G 45 Normal contour, surface chipped A B C D Weld to flat contour and then grind F E Contour symbol Finish symbol Concave contour, then chipped C