1. What is Wood Load Capacity?

Wood load capacity refers to the maximum weight a wooden beam can safely support without failing. It depends on the beam's dimensions, material properties, and span length between supports.

2. How Does the Calculator Work?

The calculator uses the beam load capacity formula:

Where:

• \( Load \) — Maximum safe load (lbs)
• \( d \) — Beam diameter (inches)
• \( Strength \) — Material strength (psi)
• \( Span \) — Distance between supports (inches)

Explanation: The equation calculates the bending capacity of a circular wood beam based on its geometric properties and material strength.

3. Importance of Load Calculation

Details: Accurate load capacity calculation is crucial for structural safety, preventing beam failure, and ensuring building code compliance.

4. Using the Calculator

Tips: Enter beam diameter in inches, material strength in psi, and span length in inches. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What's a typical strength value for wood?
A: Strength varies by species: Pine ~1,000-1,500 psi, Oak ~1,500-2,000 psi, Douglas Fir ~1,200-1,800 psi.

Q2: Does this account for safety factors?
A: No, this is theoretical capacity. For real applications, apply appropriate safety factors (typically 3-5x).

Q3: What about rectangular beams?
A: This calculator is for circular beams. Rectangular beams use different formulas involving width and height.

Q4: How does moisture affect capacity?
A: Wet wood has reduced strength. Use appropriate strength values for the wood's moisture content.

Q5: What if my beam has knots?
A: Knots significantly reduce strength. Use conservative strength values or inspect graded lumber.