Mistake & recovery · #148

Producing flat oval duct that doesn't hold dimension after forming due to incorrect gauge selection

4th YearFabrication

Flat oval duct requires stiffer gauge than round duct of equivalent area due to the flat sides. If the duct is springing open or closing after forming, th…

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Flat oval duct requires stiffer gauge than round duct of equivalent area due to the flat sides. If the duct is springing open or closing after forming, the gauge is too light. Check the SMACNA flat oval tables for the correct minimum gauge.

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Can you verify this before I keep going? I’m looking at: Producing flat oval duct that doesn't hold dimension after forming due to incorrect gauge selection. What’s the approved correction for this job?

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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.

Producing flat oval duct that doesn't hold dimension after forming due to incorrect gauge selection

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