Fire Damper Sleeve Requirements

Required sleeve gauge and length per UL listing? Retaining angles on detail?

I'm checking fire damper sleeve requirements at [location]. I found fire damper in gypsum or masonry wall with metal sleeve through wall. Required sleeve gauge and length per UL listing? Retaining angles on detail?

Fire/Smoke Dampers & Rated Assemblies 2nd Year RED

Stop if

Hold point on fire damper sleeve requirements: 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 without verifying UL requirements. Don't skip sleeve. Don't use field-fabricated sleeves not matching listing.

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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