Static field route #730

What do I do when not checking blade swing before fastening duct?

Fire/Smoke Dampers, Access Doors & Rated AssembliesHigh-risk starter answer — manufacturer/project/code/AHJ verification required

Protect damper access and rated assembly requirements: not checking blade swing before fastening duct.

Open in Field Rescue Open category

Field checklist

Confirm the damper type and exact location.
Find the access side, label, actuator, fusible link, sleeve, blade area, or inspection point.
Check that permanent access remains reachable after walls, ceiling, insulation, hangers, and other trades are installed.
Check for screws, liner, insulation, duct edges, or debris in the blade/swing path before cover.

Ask foreman

In Fire/Smoke Dampers, Access Doors & Rated Assemblies, I’m looking at: What do I do when not checking blade swing before fastening duct? What should I verify before I cut, drill, seal, cover, move, or install?

Do not

Do not treat damper or rated-assembly work like normal duct. Do not drive screws or fasteners where they can interfere with the blade, sleeve, actuator, or listed installation detail.

Why it matters

SMACNA Fire/Smoke/Radiation Damper Installation Guide; damper manufacturer instructions; approved project submittal; local code/AHJ

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