What is the minimum thickness of steel that the AWS D1.1 Structural Welding Code covers?

What is the minimum thickness of steel that the AWS D1.1 Structural Welding Code covers?

• A. 1/16 inch
• B. 1/8 inch
• C. 3/16 inch
• D. 1/4 inch

Answer: (B)

AWS D1.1 applies to welded joints in structural steel and defines the thickness range it covers. The standard’s scope begins at one-eighth of an inch, so it governs welds on steel members that are 1/8 inch thick or thicker. Thin sheet steel falls outside D1.1’s scope and is covered by other codes (for example, AWS D1.3 for sheet steel). Therefore, the minimum thickness the code covers is one-eighth inch.

AWS D1.1 applies to welded joints in structural steel and defines the thickness range it covers. The standard’s scope begins at one-eighth of an inch, so it governs welds on steel members that are 1/8 inch thick or thicker. Thin sheet steel falls outside D1.1’s scope and is covered by other codes (for example, AWS D1.3 for sheet steel). Therefore, the minimum thickness the code covers is one-eighth inch.