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Apprentice answer

How do I prepare the ductwork for a city inspector's rough-in inspection

4th YearDampers, Fire/Smoke & Life SafetyStop / Verify

Ensure all main trunk lines and branch runs are completely hung, permanently supported with code-compliant hangers, and fully sealed with mastic. * Leave all fire damper installations completely exposed with their retaining angles fully visible and access doors left unblocked. * Keep the approved, stamped city blueprint sets and all manufacturer UL engineering listing sheets on site ready for the inspector to review. Do not cover or insulate any joints until the inspector signs off on the rough-

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Plain-English answer

Ensure all main trunk lines and branch runs are completely hung, permanently supported with code-compliant hangers, and fully sealed with mastic. * Leave all fire damper installations completely exposed with their retaining angles fully visible and access doors left unblocked. * Keep the approved, stamped city blueprint sets and all manufacturer UL engineering listing sheets on site ready for the inspector to review. Do not cover or insulate any joints until the inspector signs off on the rough-in permit ticket.

Field checklist

Ask Foreman

Hey boss, I’m on code & compliance and need verification before I touch this: How do I prepare the ductwork for a city inspector's rough-in inspection? Do you want me to stop here and check the approved detail, submittal, or inspector/manufacturer requirement first?

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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