Ductwork Gauge Markings

Can you confirm the gauge marking on this duct matches the spec for our pressure class?

I'm checking ductwork gauge markings at [location]. I found sheet metal with stamped or painted gauge marking. Can you confirm the gauge marking on this duct matches the spec for our pressure class?

Rectangular Duct & Fittings 1st Year YELLOW

Stop if

Hold point on ductwork gauge markings: 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 duct without verifying gauge. Don't assume all metal from shop is correct gauge.

Check

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

Say this to your foreman

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