Plywood Load Capacity Calculator UK Pounds

Plywood Load Capacity Formula:

\[ Load_{kg} = \frac{(Strength \times Thickness_{mm}^2)}{Span_m} \]

Load Capacity:

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1. What is Plywood Load Capacity?

The plywood load capacity calculation determines how much weight a plywood sheet can support over a given span. This is crucial for construction and engineering applications where plywood is used for flooring, roofing, or structural support.

2. How Does the Calculator Work?

The calculator uses the plywood load capacity formula:

\[ Load_{kg} = \frac{(Strength \times Thickness_{mm}^2)}{Span_m} \]

Where:

\( Strength \) — Material strength in N/mm²
\( Thickness \) — Plywood thickness in millimeters
\( Span \) — Distance between supports in meters

Explanation: The equation shows that load capacity increases with material strength and thickness squared, but decreases with longer spans.

3. Importance of Load Calculation

Details: Accurate load capacity calculation is essential for structural safety, preventing material failure, and ensuring compliance with building regulations.

4. Using the Calculator

Tips: Enter material strength in N/mm², thickness in millimeters, and span in meters. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What are typical strength values for plywood?
A: Standard plywood typically ranges from 15-25 N/mm², while marine-grade can reach 30+ N/mm².

Q2: How does thickness affect load capacity?
A: Load capacity increases with the square of thickness - doubling thickness quadruples capacity.

Q3: What safety factors should be applied?
A: For structural applications, a safety factor of 3-5 is typically recommended.

Q4: Does the calculation account for deflection?
A: No, this calculates ultimate load capacity. Separate deflection calculations are needed.

Q5: How does moisture affect the calculation?
A: Wet conditions can reduce strength by 20-50% - use appropriate derating factors.