True or False: Groove weld size and the throat size for a partial joint penetration groove weld must be included in the welding symbol.

True or False: Groove weld size and the throat size for a partial joint penetration groove weld must be included in the welding symbol.

• A. True
• B. False
• C. Not required
• D. Cannot be determined

Answer: (A)

Groove weld symbols carry exact instructions about how much metal to fill and how deeply the weld must penetrate the joint. For a partial joint penetration groove weld, the throat size defines the actual effective weld depth that carries the load, while the weld size indicates how much filler metal is deposited in the groove. Including both values removes any ambiguity about the required penetration and reinforcement, ensuring the weld meets the design and inspection criteria. If the throat size weren’t specified, a welder might produce a weld with incorrect penetration, compromising strength and code compliance. That’s why the statement is true: both the groove weld size and the throat size for a partial joint penetration groove weld must be shown in the welding symbol.

Groove weld symbols carry exact instructions about how much metal to fill and how deeply the weld must penetrate the joint. For a partial joint penetration groove weld, the throat size defines the actual effective weld depth that carries the load, while the weld size indicates how much filler metal is deposited in the groove. Including both values removes any ambiguity about the required penetration and reinforcement, ensuring the weld meets the design and inspection criteria. If the throat size weren’t specified, a welder might produce a weld with incorrect penetration, compromising strength and code compliance. That’s why the statement is true: both the groove weld size and the throat size for a partial joint penetration groove weld must be shown in the welding symbol.