What type of weld is commonly used for a T-joint?

• A. Fillet weld
• B. Butt weld
• C. Corner weld
• D. Groove weld

Answer: (A)

A fillet weld is specifically designed for T-joints, where two pieces of metal meet at a right angle to form a "T" shape. This type of weld is applied to the corner of the two joining pieces, proficiently filling the joint and offering strength and structural integrity. Fillet welding is advantageous for T-joints because it can be executed easily with accessible weld access, allows for greater penetration, and accommodates discrepancies in joint fit-up.

Other weld types like butt welds require the pieces to be aligned edge-to-edge, which is unsuitable for T-joints. Corner welds are effective for forming corners but are not as widely utilized for T-joints as fillet welds. Groove welds are primarily used when the weld needs to penetrate deep into the joint, which is not typical for T-joint configurations. Thus, the fillet weld is the preferred choice for ensuring proper connection and strength in T-joint applications.