Rectangular Duct Reinforcement

For this [size] duct at [pressure class], what reinforcement does SMACNA require? Is it shown on a detail?

I'm checking rectangular duct reinforcement at [location]. I found rectangular duct with visible cross-breaks, angles, or tie rods. For this [size] duct at [pressure class], what reinforcement does SMACNA require? Is it shown on a detail?

Rectangular Duct & Fittings 2nd Year RED

Stop if

Hold point on rectangular duct reinforcement: I have the location, photo, drawing/detail, and what was checked. Who should verify before this gets cut, covered, lifted, sealed, energized, or signed off?

Watch out

Don't install large duct without checking reinforcement requirements. Don't skip reinforcement because it's not on the BOM.

Check

room/grid/area
photo of condition
drawing/detail
manufacturer/model if visible
what I already checked

Say this to your foreman

14305 rectangular duct reinforcement duct assembly, seams & joints red for this [size] duct at [pressure class], what reinforcement does smacna require? is it shown on a detail? duct reinforcement, cross break duct, stiffener spacing, tie rod duct duct reinforcement, cross-breaking, stiffener, reinforcement angle, tie rod duct brace, metal rib, reinforcement bar, stiffener