WELDED CONSTRUCTION
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Table 8-36 (cont.). Prequalified Welded Joints Complete-Joint-Penetration Groove Welds Single-V-groove weld (2) Butt joint (B)
Welding Process
Joint Designation
SMAW
Base Metal Thickness (U = unlimited)
Groove Preparation Tolerances
Root Opening Root Face Groove Angle
As Detailed
As Fit Up
Gas Permitted Shielding Welding for Positions Notes FCAW
T1
T2
B-U2
U
—
R = 0 to 1⁄8 f = 0 to 1 ⁄8 α = 60°°
+1 ⁄16 , − 0 +1 ⁄16 , − 0 +10°°, − 0°°
+1 ⁄16 , − 1 ⁄8 Not limited +10°°, − 5°°
All
—
C, N
GMAW FCAW
B-U2-GF
U
—
R = 0 to 1⁄8 f = 0 to 1 ⁄8 α = 60°°
+1 ⁄16 , − 0 +1 ⁄16 , − 0 +10°, − 0°°
+1 ⁄16 , −1 ⁄8 Not limited +10°, − 5°°
All
Not required
A, C, N
SAW
B-L2c-S
Over 1 ⁄2 to 1
—
R = 0, α = 60°° f = 1 ⁄4 max
R = ±0 f = +0, − f α = +10°°, − 0°°
+1 ⁄16 , − 0
F
—
C, N
Over 1 to 11 ⁄2
—
R = 0, α = 60°° f = 1 ⁄2 max
Over 11 ⁄2 to 2
—
R = 0, α = 60°° f = 5 ⁄8 max
± 1 ⁄16 +10°°, − 5°°
Single-V-groove weld (2) Corner joint (C)
Welding Process
Joint Designation
SMAW
Base Metal Thickness (U = unlimited)
Groove Preparation Tolerances
Root Opening Root Face Groove Angle
As Detailed
As Fit Up
Gas Permitted Shielding Welding for Positions FCAW Notes
T1
T2
C-U2
U
U
R = 0 to 1 ⁄8 f = 0 to 1 ⁄8 α = 60°°
+1 ⁄16 , − 0 +1 ⁄16 , − 0 +10°°, − 0°°
+1 ⁄16 , − 1 ⁄8 Not limited +10°°, − 5°°
All
—
C, J, R
GMAW FCAW
C-U2-GF
U
U
R = 0 to 1 ⁄8 f = 0 to 1 ⁄8 α = 60°°
+1 ⁄16 , − 0 +1 ⁄16 , − 0 +10°, − 0°°
+1 ⁄16 , −1⁄8 Not limited +10°°, − 5°°
All
Not required
A, C, J, R
SAW
C-L2b-S
U
U
R=0 f = 1 ⁄4 max α = 60°°
±0 +0, − 1 ⁄4 +10° − 0°
+1 ⁄16 , − 0
F
—
C, J, R
± 1 ⁄16 +10°°, − 5°°
AMERICAN INSTITUTE OF STEEL CONSTRUCTION