Which statement best describes the labeling requirement for reinforcement?

• A. ASTM A615 reinforcement is marked with S designation
• B. Reinforcement requires no designation
• C. Designation is optional
• D. Only when heat-treated bars are designated

Answer: (A)

Labeling reinforcing steel communicates that the material meets a specific standard and grade, allowing quick verification on the job site or in fabrication. For ASTM A615 reinforcement, the bars are marked with an S designation, which signals that the product conforms to that specification. This marker is essential for inspectors and installers to confirm the correct type and strength of rebar is used, preventing substitutions that could compromise performance. The other statements aren’t accurate because reinforcement does carry a designation, the designation isn’t optional, and the marking isn’t limited to heat-treated bars—ASTM A615 reinforcement should carry the S designation.