Mistake & recovery · #076

Installing a straight run of duct without expansion joints in a long plenum

2nd YearDuct Systems

Duct expands and contracts with temperature changes. Any straight run over 30 feet in a system with wide temperature swings needs an expansion joint per S…

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Duct expands and contracts with temperature changes. Any straight run over 30 feet in a system with wide temperature swings needs an expansion joint per SMACNA to prevent buckling or connection failure.

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Can you verify this before I keep going? I’m looking at: Installing a straight run of duct without expansion joints in a long plenum. 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.

Installing a straight run of duct without expansion joints in a long plenum

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