Where is the leg size (or weld size) placed in relation to the weld symbol?

• A. Above the symbol
• B. On the right side of
• C. On the left side of
• D. Below the symbol

Answer: (C)

Weld size is shown to the left of the weld symbol on the reference line. This placement makes the required size—the leg length for fillet welds or groove size for groove welds—the first numeric detail you read, conveying how big the weld must be. The symbol itself on the right describes the weld type, while other details like length or supplementary requirements appear further to the right or above/below the line as appropriate. So the leg size being on the left is the standard way to communicate the weld’s size quickly and clearly.