What Pressure Class Means

What pressure class is this section and where does it step down?

I'm checking what pressure class means at [location]. I found Building light-class duct on a high-class run; seal/support fails. What pressure class is this section and where does it step down?

Rectangular Duct & Fittings 2nd Year YELLOW

Stop if

Hold point on what pressure class means: I have the location, photo, drawing/detail/spec section, and what I checked. Who should verify before this gets cut, drilled, covered, supported, labeled, connected, or signed off?

Watch out

Assume all supply is the same class

Check

room/grid/area
photo of condition
drawing/detail/spec/submittal
what I already checked
what is blocking progress

Say this to your foreman

14533 what pressure class means rectangular duct yellow 2 what pressure class is this section and where does it step down? i'm checking what pressure class means at [location]. i found building light-class duct on a high-class run; seal/support fails. what pressure class is this section and where does it step down? pressure class pressure class, static pressure, in. wg, positive/negative