Mistake & recovery · #067

Cutting a round collar too large so it spins freely instead of gripping

2nd YearSheet Metal Work

Collar diameter should match the duct ID with just enough clearance to insert. Use a wrap-around template to scribe the collar cutout and cut to the insid…

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Collar diameter should match the duct ID with just enough clearance to insert. Use a wrap-around template to scribe the collar cutout and cut to the inside of the line. Test fit before welding or fastening.

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Can you verify this before I keep going? I’m looking at: Cutting a round collar too large so it spins freely instead of gripping. What’s the approved correction for this job?

Do not

Do not hide, force, cover, or “make it work” if this affects safety, access, airflow, rated assemblies, supports, equipment, or inspection. Stop and verify the approved correction.

Cutting a round collar too large so it spins freely instead of gripping

Safer field move

Ask Foreman

Do not

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