Which documents verify reinforcement properties on a project?

• A. Mill test reports, bar markings, and supplier certifications; field inspection records
• B. Contractor invoices and delivery tickets
• C. Architectural drawings and client emails
• D. Soil borings and compaction tests

Answer: (A)

The documents that verify reinforcement properties on a project are the ones that capture what the steel actually is, its quality, and that it meets the required specs. Mill test reports show the chemical makeup and mechanical properties for each batch of reinforcing bar, including grade and strength tests. Bar markings stamped on the steel indicate its size and grade, letting inspectors confirm the correct reinforcement is being used. Supplier certifications confirm the material meets specified standards and supplier quality controls. Field inspection records document on-site verification, including materials received, storage, and any testing or certification checks performed during installation.

Invoices and delivery tickets only show purchase and receipt details, not the material properties. Architectural drawings and client emails relate to design and communications, not the actual reinforcement specifications. Soil borings and compaction tests pertain to geotechnical conditions, not reinforcement material properties.