AWS Weld Detail Legend:

Legend for Figures 2.4 and 2.5

Symbols for joint types

  • B-butt joint
  • C-corner joint
  • T-T-joint
  • BC-butt or corner joint
  • TC-T-or corner joint
  • BTC-butt, T-, or corner joint

Symbols for base metal thickness and penetration

  • L-limited thickness-complete joint penetration
  • U-unlimited thickness-complete joint penetration
  • P-partial joint penetration

Symbols for weld types

  • 1-square-groove
  • 2-single-V-groove
  • 3-double-V-groove
  • 4-single-bevel-groove
  • 5-double-bevel-groove
  • 6-single-U-groove
  • 7-double-U-groove
  • 8-single-J-groove
  • 9-double-J-groove
  • 10-flare-bevel-groove

The lower case letters, e.g., a, b, c, etc., are used to differentiate between joints that would otherwise have the same joint designation.

  • NOTE A: Groove preparations detailed for shielded metal arc welded joints may be used for gas metal arc or flux cored arc welding.
  • NOTE B: Joint is welded from one side only.
  • NOTE C: Gouge root to sound metal before welding second side.
  • NOTE D: Minimum weld size (E) is shown in Table 2.2; S as specified on drawings.
  • NOTE E: Evidence of complete joint penetration is required (see 4.7.5).
  • NOTE F: Groove welds in corner and T-joints shall be reinforced with fillet welds equal to 1/4 T1, but need not exceed 3/8 in.
  • NOTE G: Double-groove welds may have grooves of unequal depth, but the depth of the shallower groove shall be no less than one-fourth of the thickness of the thinner part joined.
  • NOTE H: Double-groove welds may have grooves of unequal depth, provided they conform to the limitations of Note D. Also, the weld size (E), less any reduction, applies individually to each groove.
  • NOTE I: The orientation of the two members in the joints may vary from 135 deg to 180 deg, provided that the basic joint configura­ tion (groove angle, root face, root opening) remains the same and that the design weld size is maintained.
  • NOTE J: For corner and T-joints, the member orientation may be changed provided the groove angle is maintained as specified.
  • NOTE K: The member orientation may be changed provided that the groove dimensions are maintained as specified.
  • NOTE L: The orientation of the two members in the joints may vary from 45 deg to 135 deg for corner joints and from 45 deg to 90 deg for T-joints, provided that the basic joint configuration (groove angle, root face, root opening) remains the same and that the design weld size is maintained.