What is a weld symbol and where is it read from?

• A. A weld symbol is a color annotation on the surface
• B. A weld symbol is the weld bead shape drawn on the weld
• C. A weld symbol is a standardized graphic on engineering drawings that communicates weld type, size, and location; read from the drawing line and symbol
• D. A weld symbol is a textual note describing weld processing

Answer: (C)

A weld symbol is a standardized graphic on engineering drawings that communicates weld type, size, and location. It’s read along the drawing’s reference line: the symbol is placed on the side of the line that corresponds to where the weld goes, and the arrow points to the joint being welded. By interpreting the shape of the symbol, any size numbers, and supplementary marks along that line, you determine exactly what weld to make and where to place it. This is more precise and concise than color notes, bead sketches, or plain written descriptions, which is why this description fits best.