AISC LRFD 1.pdf

Sect. J2.] WELDS 53Welding ProcessTABLE J2.1Effective Throat Thickness ofPartial-Joint-Penetration Groove WeldsWelding PositionIncluded Angle atRoot of GrooveShielded metal arcJ or U jointSubmerged arcGas metal arcAllBevel or V joint 60°Flux-cored arc Bevel or V joint 60°Bevel or V but 45°Effective ThroatThicknessDepth of chamferDepth of chamferMinus 1 8-in. (3 mm)TABLE J2.2Effective Throat Thickness of Flare Groove WeldsType of Weld Radius (R) of Bar or Bend Effective Throat ThicknessFlare bevel groove All5 16RFlare V-groove All1 2R [a][a] Use 3 8R for Gas Metal Arc Welding (except short circuiting transfer process) when R 1 in. (25 mm)Errata9/4/01TABLE J2.3Minimum Effective Throat Thickness ofPartial-Joint-Penetration Groove WeldsMaterial Thickness ofThicker Part Joined, in. (mm)[a] See Table J2.1To 1 4 (6) inclusiveOver 1 4 (6) to 1 2 (13)Over 1 2 (13) to 3 4 (19)Over 3 4 (19) to 1 1 2 (38)Over 1 1 2 (38) to 2 1 4 (57)Over 2 1 4 (57) to 6 (150)Over 6 (150)Minimum EffectiveThroat Thickness [a], in. (mm)1 8 (3)3 16 (5)1 4 (6)5 16 (8)3 8 (10)1 2 (13)5 8 (16)exception, particular care shall be taken to provide sufficient preheat for soundnessof the weld.2. Fillet Welds2a. Effective AreaThe effective area of fillet welds shall be as defined in AWS D1.1 Section 2.4.3 and2.11. The effective throat thickness of a fillet weld shall be the shortest distancefrom the root of the joint to the face of the diagrammatic weld, except that for filletwelds made by the submerged arc process, the effective throat thickness shall beLRFD Specification for Structural Steel Buildings, December 27, 1999AMERICAN INSTITUTE OF STEEL CONSTRUCTION