A groove (butt) weld with complete penetration is preferred over a fillet weld when:
Choose the correct answer
The joint is non-critical
Full tensile or compressive capacity of the connected members is required without eccentricity
Cost is the primary concern
Members are thin plates
Correct Answer
B. Full tensile or compressive capacity of the connected members is required without eccentricity
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Complete penetration groove welds develop the full strength of the base metal in tension, compression, or shear. They are preferred for moment connections, tension splices, and high-stress critical joints. Fillet welds are economical for lap joints and T-joints.
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