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Ductwork support and recommended spacing between hangers
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Support spacing for the ductwork is typical based upon deflection, stress and cylinder buckling analysis. For sheet metal ductwork the spacing between hangers should not exceed the maximum distances listed in the table below.
| Ducts Size
(Sq.Ft) |
Maximum Spacing
(Feet) |
| less than 4 | 8 |
| 4 to 10 | 6 |
| more than 10 | 4 |
| Ducts Type | Maximum Spacing
(Feet) |
| round | 12 |
| rectangular | 10 |
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