Hanger Spacing for Rectangular Duct

What hanger spacing does SMACNA require for this [size] duct? Is there a project hanger schedule to verify?

I'm checking hanger spacing for rectangular duct at [location]. I found rectangular duct run with hangers at regular intervals. What hanger spacing does SMACNA require for this [size] duct? Is there a project hanger schedule to verify?

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Stop if

Hold point on hanger spacing for rectangular duct: 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 guess hanger spacing. Don't exceed SMACNA maximums. Don't assume one spacing fits all duct sizes.

Check

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

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