Which welding symbol on drawings indicates a fillet weld?

• A. Fillet weld symbol (fillet size on leg)
• B. Groove weld symbol (groove type and depth)
• C. Tack weld symbol (temporary attachments)
• D. Spot weld symbol

Answer: (A)

Welding drawings communicate how the weld should be made by using specific symbols. The symbol that indicates a fillet weld is a small right-angle shape placed on the reference line at the joint. The size of the fillet weld is given by the length of the legs of that triangular symbol, which tells the welder how big the fillet bead should be along both members. Fillet welds are used where two pieces meet at a non-groove joint and don’t require edge preparation. Other symbols point to different weld types: a groove weld symbol shows groove details and depth, a tack weld symbol marks temporary attachments, and a spot weld symbol indicates a weld at a discrete spot.