Which document type is typically used to verify the exact rebar sizes and grade specified for a project?

• A. Structural coordination drawings only
• B. Mill test reports, bar markings, and supplier certifications
• C. Field inspection records only
• D. Soil test reports

Answer: (B)

The exact rebar sizes and grades for a project are verified through documents that provide the actual material properties and traceability from the mill and supplier. Mill test reports show the chemical composition and mechanical properties of each rebar lot, including the nominal size and the grade (yield/tensile strength) that the material meets. Bar markings on the steel itself indicate production details such as the mill, size, and grade, allowing quick on-site verification of what you have. Supplier certifications corroborate that the supplied lots comply with the project specs and standards, often tying to a batch or heat number for traceability.

These documents together confirm that the material being used matches the specified size and grade, not just how it’s supposed to be arranged in drawings or what was installed. Structural coordination drawings guide layout but don’t prove material properties. Field inspection records check installation quality, not the material’s inherent properties. Soil test reports relate to geotechnical conditions, not reinforcing steel specifications.