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Mistake & recovery · #104

Fabricating a duct section that exceeds the maximum unsupported length per SMACNA

3rd YearFabrication

Check SMACNA Table 4-1 for maximum duct dimensions and reinforcement requirements before fabricating any large section. Oversized unsupported panels defle…

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Check SMACNA Table 4-1 for maximum duct dimensions and reinforcement requirements before fabricating any large section. Oversized unsupported panels deflect, vibrate, and fail.

Ask Foreman

Can you verify this before I keep going? I’m looking at: Fabricating a duct section that exceeds the maximum unsupported length per SMACNA. 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.

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