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Rectangular Duct Weight Formula:
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The rectangular duct weight formula calculates the weight of a rectangular duct based on its dimensions and material density. This calculation is essential for HVAC system design, material estimation, and structural support planning.
The calculator uses the rectangular duct weight formula:
Where:
Explanation: The formula calculates the surface area of the duct (accounting for all four sides) and multiplies it by thickness and density to determine the total weight.
Details: Accurate duct weight calculation is crucial for structural engineering, HVAC system design, material procurement, and installation planning. It helps determine proper support requirements and ensures system integrity.
Tips: Enter all dimensions in meters and density in kg/m³. Common duct materials include galvanized steel (7850 kg/m³), aluminum (2700 kg/m³), and stainless steel (8000 kg/m³).
Q1: Why multiply by 2 in the formula?
A: The factor of 2 accounts for both sides of the duct (top/bottom and left/right) in the calculation.
Q2: What are typical density values for duct materials?
A: Galvanized steel: 7850 kg/m³, Aluminum: 2700 kg/m³, Stainless steel: 8000 kg/m³, Copper: 8960 kg/m³.
Q3: Can this calculator be used for circular ducts?
A: No, this formula is specifically for rectangular ducts. Circular ducts require a different calculation method.
Q4: How accurate is this calculation?
A: The calculation provides a theoretical weight that may vary slightly from actual weight due to manufacturing tolerances and additional components like joints and fasteners.
Q5: Should I include insulation in the weight calculation?
A: This calculator calculates only the duct material weight. Insulation weight should be calculated separately and added to the total if needed.