206 Welding Print Reading the print, Figure 16-12. When a break in the arrow is used with bevel- and J-groove welds, the arrow points toward the member to be beveled, Figure 16-13. Groove Dimensions Many companies have established their own standards for groove weld dimensions. These stan- dards are observed unless otherwise noted on the print. When company standards for groove welds are not indicated, the following applies: ❍ The root opening is indicated inside the weld symbol, Figure 16-14. ❍ The groove angle or bevel angle is specified, Figure 16-15. ❍ The groove radii (used to form the shape of J- or U-groove welds) and root faces (the parts of the groove face within the joint root) are shown by cross section, detail, or other means with a reference on the welding sym- bol, Figure 16-16. Figure 16-14. The root opening of a groove weld is specified inside the weld symbol when standards are not otherwise indicated. 1 8 1 8 Desired weld Symbol Figure 16-15. Study how groove angles of groove welds are specified. 45° 45° 45° 45° 50° 50° 60° 90° 60° 90° 15° 15° Desired welds Symbols Figure 16-12. If a general note indicating weld size is on the print, no groove weld dimensions are given with the welding symbol. NOTE- ALL V-GROOVE WELDS SHALL HAVE A 60° GROOVE ANGLE UNLESS OTHERWISE NOTED. Weld specified 60° Note and symbol Figure 16-13. A break in an arrow always points toward the member of the single-bevel-groove or J-groove joint to be beveled. Other side bevel-groove weld symbol Desired weld Symbol Figure 16-11. Groove welds differing in size are dimensioned in the manner shown. 60° 90° 3(2) 8 3(8) 4 1 7 3 4 7 8 3 8 1 2 60° 90° Desired weld Symbol