Supporting Ductwork

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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.

Horizontal Ductwork

Vertical Ductwork

• 1 ft² = 0.0929 m² = 144 in²
• 1 ft (foot) = 0.3048 m = 12 in

Note! The support systems for ducting may provide restraint in three directions against displacement and rotation and consideration must be given when restraining ducts to avoid the development of excessive internal duct stresses such as possible expansion or contraction due to temperature variations.

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Related Topics

• Ventilation - Systems for ventilation and air handling - air change rates, ducts and pressure drops, charts and diagrams and more

Related Documents

• Ductwork Sheet Metal Gauges - Sheet metal gauges used in ductwork
• Hanger Support Spacing and Rod Size for Horizontal Pipes - Recommended maximum support span between hangers - and rod sizes for straight horizontal pipes
• Sizing Ducts - The ductwork of ventilation systems are often sized with either the Velocity, the Constant Pressure Loss (or Equal Friction Loss) - or the Static Pressure Recovery Methods