Static field route #19096

What do I do when raw duct is run through a rated drywall wall with only fire caulk?

Fire/Smoke Dampers, Access Doors & Rated Assemblies🛑 STOP / GET DIRECTIONV191 answer-gap expansion

📖 Verified core answer

Do not treat raw duct plus caulk as an automatic rated penetration. Rated wall crossings need the approved sleeve/firestop/retaining detail for that assembly.

Open in Field Rescue Open category

Field verification checklist

Identify wall rating and whether a fire/smoke damper or sleeve is required.
Check approved drawings, firestop submittal, damper instructions, and UL/system detail.
Inspect whether duct is rubbing drywall/framing or missing sleeve/retaining detail.
Photograph before cover and get foreman/GC/firestop direction.
Do not cover until the rated assembly is accepted.

Ask foreman

The duct at [location] penetrates a rated drywall wall without the proper sleeve/detail, just fire caulk. I checked the wall rating. Do you want us to pull back and install the approved penetration assembly?

Text to foreman

Route options

AMake the field correction only if it is within your assignment and the approved method.

BHold and document the condition if the fix affects airflow, access, life safety, pressure class, rated assemblies, equipment, or another trade.

CBring the foreman/detailer the location, what you checked, and what decision you need before cover, startup, or rework.

Do not do this

Do not rely on random fire caulk to legalize an unapproved rated wall penetration.

Why this matters

Incorrect rated penetrations are life-safety failures and can trigger inspection rejection, demo, and rework.

Final verification

Use this as field training guidance. Final direction still comes from the foreman, approved drawings, project specs, manufacturer installation instructions, employer safety policy, and AHJ/code requirements.

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