Pressure Class vs Gauge Selection
Duct gauge must match the pressure class. Using wrong gauge creates structural failure or waste.
Stop if
- For this duct at [pressure class], what gauge does SMACNA require? Can you confirm shop is fabricating to correct gauge?
Watch out
- Don't assume all duct is 26 gauge. Don't use light gauge for high pressure. Don't substitute gauge without engineer approval.
Check
- What pressure class on drawings?
- What gauge does SMACNA require for that pressure and duct size?
- Shop fabricating to correct gauge?
Steps
- What pressure class on drawings?
- What gauge does SMACNA require for that pressure and duct size?
- Shop fabricating to correct gauge?
Say this to your foreman
For this duct at [pressure class], what gauge does SMACNA require? Can you confirm shop is fabricating to correct gauge?
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