Last reviewed October 27, 2026

Gauge labels are commonly used in the field, but procurement should identify minimum base-metal thickness in mils or decimal inches, the member profile, yield strength, coating and intended structural classification.

ASTM C645 covers nonstructural framing members, while ASTM C955 addresses structural framing. A member should not be assumed structural based only on a familiar gauge label.

For quotation, include web depth, flange width, minimum thickness, length, punch pattern, coating and the approved framing schedule or submittal basis.

Technical guidance is general. Confirm the selected manufacturer’s current documentation, project drawings, professional design and applicable authority requirements.