Notching Duct for Structural Conflicts
Sometimes duct must be notched for beams. Notching weakens duct and may need reinforcement.
What You Might Be Looking At
duct section with notch cut to clear beam or structural element
Apprentice words: cutting duct for beam, notch in duct, duct around structure, field cut
Trade terms: duct notch, field notch, structural clearance, duct modification
Check First
What Not To Do
Do not notch structural members. Do not notch or field-cut duct for a beam conflict without approved direction. Do not treat a conflict as a fabrication problem until drawings/details are checked.
What can go wrong: Duct collapse, pressure test failure, structural compromise, inspector rejection, re-work
Better Foreman Question
Maximum notch allowed without reinforcement? Engineer-approved detail if it exceeds that?
Verify With
Reference type: SMACNA, engineered detail
Source to verify: SMACNA HVAC Duct Construction Standards, project structural details
Safe wording: This is a coordination hold point. Structure and rated assemblies are not field-choice items.