How is a fillet weld symbol interpreted on a drawing in terms of size and location?

• A. Size indicates depth
• B. Location is by color
• C. The fillet symbol size indicates leg length; location is determined by the symbol's position relative to the joint on the drawing
• D. Leg length is position

Answer: (C)

Reading a fillet weld symbol is about two things: how big the weld is and where it goes. The size of the fillet symbol corresponds to the leg length of the weld, meaning how long each leg of the weld sits along the two pieces being joined. The location is shown by where the symbol sits relative to the joint line on the drawing—its position tells you on which side of the joint the weld will be applied. So the symbol’s size gives leg length, and its placement relative to the joint indicates the weld’s location. Color or depth aren’t used for indicating this, and leg length isn’t a matter of position.