What is AWS D1.1 and why is it relevant to a C-60 contractor?

• A. AWS D1.1 is the Structural Welding Code for Steel; it provides weld requirements, design considerations, and acceptance criteria used on structural steel projects.
• B. AWS D1.1 is a code for electrical safety in welding.
• C. AWS D1.1 is a standard for paint application on steel surfaces.
• D. AWS D1.1 is a guideline for shop layout.

Answer: (A)

AWS D1.1 is the Structural Welding Code for Steel. It specifies how welds on load‑bearing steel structures should be designed, welded, and inspected, and it sets the acceptance criteria for weld quality. For a C-60 contractor, this standard is central because most structural steel work on projects references AWS D1.1 or project specs that rely on it. It covers which welding processes are allowed, how welding procedures must be documented and qualified, filler metal choices, joint designs, and the criteria used to approve or reject welds (including when nondestructive testing is required). Following AWS D1.1 helps ensure welds meet safety, strength, and durability expectations and aligns with common building codes and owner requirements. The other options describe areas (electrical safety, paint, or shop layout) that aren’t the focus of this code.