What does AWS D1.1 cover?

• A. The Structural Welding Code – Steel, which provides requirements for design, welding procedures, qualifications, and inspection of steel welds.
• B. The Structural Welding Code – Aluminum.
• C. Non-destructive testing standard.
• D. Heat treatment of steel.

Answer: (A)

AWS D1.1 defines the requirements for welding steel structures, including how designs are welded, the welding procedures to be used, the qualification of welders and welding procedures, and how welds are inspected and accepted. That scope matches the option describing the Structural Welding Code – Steel, which is exactly what D1.1 covers. There is a separate code for aluminum welding—Structural Welding Code – Aluminum—so the aluminum option points to a different standard. D1.1 also isn’t a stand-alone non-destructive testing standard, though it includes inspection criteria as part of the overall quality requirements, and it isn’t primarily about heat treatment.