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Apprentice Q&A · #116

How do I handle and install exposed double-wall spiral duct without scratching it?

3rd YearSpecialty DuctRED · Stop / Verify

Wear clean, oil-free cloth utility gloves. Keep the factory protective plastic wrap skin intact on the exterior of the pipe sections for as long as possible during hanging.

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Plain-English answer

Wear clean, oil-free cloth utility gloves. Keep the factory protective plastic wrap skin intact on the exterior of the pipe sections for as long as possible during hanging.

Use wide nylon lifting slings instead of wire chains on your chain hoists, and cushion the metal inside your cradle hangers using custom-cut rubber neoprene lining strips.

Field checklist

Ask Foreman

Hey boss, I’m on specialty duct and need verification before I touch this: How do I handle and install exposed double-wall spiral duct without scratching it? Do you want me to stop here and check the approved detail, submittal, or inspector/manufacturer requirement first?

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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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