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Duct Construction Specs: galvanized gauge
26 to 30
ASHRAE duct construction specifications: sheet metal gauge thickness and weight for galvanized, uncoated, and stainless steel ductwork; duct leakage percentages by leakage class and flow ratio; and maximum allowable fan system leakage by HVAC system type
| data type | gage | minimum thickness in (in) | nominal thickness in (in) | nominal weight lb per ft2 (lb/ft2) |
|---|---|---|---|---|
| galvanized gauge | 26 | 0.0187 | 0.0217 | 0.906 |
| galvanized gauge | 28 | 0.0157 | 0.0187 | 0.781 |
| galvanized gauge | 30 | 0.0127 | 0.0157 | 0.656 |
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