Dar Al-Handasah Duct Weight Calculator

Duct Weight Formula:

\[ \text{Duct Weight} = 7.85 \times t \times \text{area} \]

Duct Weight:

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1. What is the Dar Al-Handasah Duct Weight Calculation?

The Dar Al-Handasah duct weight calculation method estimates the weight of GI sheet ducts using a specific formula that considers material thickness and surface area. This calculation is essential for HVAC system design and material estimation.

2. How Does the Calculator Work?

The calculator uses the Dar Al-Handasah formula:

\[ \text{Duct Weight} = 7.85 \times t \times \text{area} \]

Where:

\( t \) — Thickness of GI sheet (mm)
\( \text{area} \) — Surface area of the duct (m²)
7.85 — Density factor for GI sheet (kg/m³ per mm thickness)

Explanation: The formula multiplies the material density factor by thickness and surface area to calculate the total weight of the duct.

3. Importance of Duct Weight Calculation

Details: Accurate duct weight calculation is crucial for structural support design, transportation planning, material cost estimation, and installation planning in HVAC projects.

4. Using the Calculator

Tips: Enter thickness in millimeters and surface area in square meters. Both values must be positive numbers for accurate calculation.

5. Frequently Asked Questions (FAQ)

Q1: What material does this calculation apply to?
A: This calculation is specifically designed for Galvanized Iron (GI) sheet ducts using the Dar Al-Handasah method.

Q2: Why is the density factor 7.85?
A: The factor 7.85 represents the density of steel (7850 kg/m³) converted to kg per mm thickness per square meter.

Q3: Does this include fittings and accessories?
A: No, this calculation provides the weight of straight duct sections only. Additional weight for elbows, reducers, and other fittings should be calculated separately.

Q4: How accurate is this calculation method?
A: The Dar Al-Handasah method provides reliable estimates for preliminary design and material planning, though actual weights may vary slightly based on manufacturing tolerances.

Q5: Can this be used for other sheet metal types?
A: While primarily for GI sheets, the method can be adapted for other materials by adjusting the density factor according to the specific material density.