1. What is the Plywood Capacity Equation?

The plywood capacity equation estimates the weight capacity of a plywood sheet based on its dimensions and material properties. It's essential for construction and engineering applications to ensure structural integrity.

2. How Does the Calculator Work?

The calculator uses the plywood capacity equation:

Where:

• \( Thickness \) — Thickness of plywood (inches)
• \( Width \) — Width of plywood (inches)
• \( Strength \) — Material strength (psi)
• \( Span \) — Distance between supports (inches)

Explanation: The equation accounts for the cubic relationship between thickness and capacity, and the inverse square relationship with span length.

3. Importance of Capacity Calculation

Details: Accurate capacity estimation is crucial for structural safety, preventing overloading, and ensuring proper material selection in construction projects.

4. Using the Calculator

Tips: Enter all dimensions in inches, strength in psi. All values must be positive numbers. Typical plywood strength ranges from 3,000 to 5,000 psi.

5. Frequently Asked Questions (FAQ)

Q1: What affects plywood capacity the most?
A: Thickness has the greatest impact as it's cubed in the equation, followed by span length (squared in denominator).

Q2: What are typical strength values for plywood?
A: Standard plywood ranges from 3,000-5,000 psi. Marine-grade or specialty plywood may be higher.

Q3: Does this account for dynamic loads?
A: No, this calculates static capacity. For dynamic loads, apply appropriate safety factors.

Q4: How does moisture affect capacity?
A: Wet conditions can reduce strength by up to 50%. Use appropriate derating factors for outdoor applications.

Q5: Is this suitable for all plywood types?
A: The equation works for standard plywood. Engineered wood products may require different calculations.