AISC


3.1. Member Cross-sectional Tolerances

3.1.1. Can out-of-tolerance mill material be adjusted by the fabricator so that it conforms to the appropriate tolerances?

Sometimes, yes. Infrequently, material is discovered after delivery to be beyond mill tolerances. When material received from the rolling mill does not conform to the requirements of ASTM A6/A6M (or more restrictive tolerances that are specified in the contract documents and purchasing documents), the fabricator can use controlled heating, mechanical straightening or a combination of both methods, consistent with manufacturer recommendations, to adjust cross-section, flatness, straightness, camber and/or sweep.