Where is the size of the root opening of a weld joint shown?

Where is the size of the root opening of a weld joint shown?

• A. In the tail of the welding symbol.
• B. On the top surface of the weld symbol.
• C. Inside the weld symbol.
• D. On the right side of the weld symbol.

Answer: (C)

The size of the root opening is a geometric detail of a groove weld, so it is shown inside the weld symbol itself. Placing this dimension inside the symbol keeps it with the other groove-related details, making the reader interpret the joint’s fit-up and penetration together. The tail is reserved for additional references or standards, the top surface area isn’t where dimensions like root gap are indicated, and the right side of the symbol is typically used for supplementary information or other weld features. So, showing the root opening size inside the weld symbol is the correct way to convey this parameter.

The size of the root opening is a geometric detail of a groove weld, so it is shown inside the weld symbol itself. Placing this dimension inside the symbol keeps it with the other groove-related details, making the reader interpret the joint’s fit-up and penetration together. The tail is reserved for additional references or standards, the top surface area isn’t where dimensions like root gap are indicated, and the right side of the symbol is typically used for supplementary information or other weld features. So, showing the root opening size inside the weld symbol is the correct way to convey this parameter.