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

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-

['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.']

Stop if

• 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.

Check

• 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 door

Steps

• Stop and verify the approved detail, manufacturer instructions, foreman direction, and project specs before touching it.
• 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...

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