How Do You Calculate RHS Weight

RHS Weight Formula:

\[ \text{Weight (kg/m)} = [(\text{height (mm)} \times \text{width (mm)}) - ((\text{height (mm)} - 2 \times \text{thickness (mm)}) \times (\text{width (mm)} - 2 \times \text{thickness (mm)}))] \times 0.00785 \]

Weight (kg/m):

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1. What is RHS Weight Calculation?

RHS (Rectangular Hollow Section) weight calculation determines the mass per meter of steel hollow sections used in construction and engineering. This calculation is essential for structural design, material estimation, and cost calculation.

2. How Does the Calculator Work?

The calculator uses the RHS weight formula:

\[ \text{Weight (kg/m)} = [(\text{height} \times \text{width}) - ((\text{height} - 2 \times \text{thickness}) \times (\text{width} - 2 \times \text{thickness}))] \times 0.00785 \]

Where:

\( \text{height} \) — Outer height of the section (mm)
\( \text{width} \) — Outer width of the section (mm)
\( \text{thickness} \) — Wall thickness of the section (mm)
0.00785 — Density coefficient for steel (kg/mm³)

Explanation: The formula calculates the cross-sectional area by subtracting the inner hollow area from the outer area, then multiplies by steel density to get weight per meter.

3. Importance of RHS Weight Calculation

Details: Accurate weight calculation is crucial for structural engineering, load calculations, transportation planning, and cost estimation in construction projects using steel hollow sections.

4. Using the Calculator

Tips: Enter all dimensions in millimeters. Ensure thickness is less than half of both height and width to get valid results. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What does RHS stand for?
A: RHS stands for Rectangular Hollow Section, which is a type of steel tubing with a rectangular cross-section.

Q2: Why is the density coefficient 0.00785?
A: This value represents the density of steel (7850 kg/m³) converted to appropriate units for mm measurements.

Q3: Can this calculator be used for square hollow sections?
A: Yes, for square hollow sections (SHS), simply enter the same value for both height and width.

Q4: What are typical RHS sizes?
A: Common RHS sizes range from 20×10mm to 400×200mm, with wall thicknesses typically between 1.6mm to 12.5mm.

Q5: How accurate is this calculation?
A: This provides theoretical weight based on nominal dimensions. Actual weight may vary slightly due to manufacturing tolerances and material composition.