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Apprentice Q&A · #255

Can multi-section fire/smoke dampers be joined with regular drywall screws?

3rd YearFire/Smoke DampersRED · Stop / Verify

No — multi-section damper assemblies must be joined exactly per the manufacturer/listed installation. Remove wrong fasteners and use the approved splice/hardware detail.

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Plain-English answer

A multi-section FSD is a listed life-safety assembly. The splice between sections is not a random sheet-metal connection; it is part of the tested installation.

If the wrong screws or missing splice parts were used, stop cover and correct it using the manufacturer’s approved splice plates, fasteners, gaskets, and orientation. Keep the installation sheet/submittal with the corrected assembly for inspection.

Field checklist

Ask Foreman

The multi-section FSD at [location] was spliced with the wrong fasteners. I checked the installation sheet and factory parts. Do you want it pulled apart and reassembled with the approved splice hardware before inspection?

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Verify before acting

Use this as training guidance. The foreman, approved drawings, project specs, manufacturer installation instructions, employer safety policy, and AHJ/code requirements always control the final answer.

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