1. What is the Bridge Law Weight Formula?

The Bridge Law Weight Formula calculates the maximum legal weight for vehicles based on their length and number of axles. This formula helps ensure vehicles don't exceed weight limits that could damage bridges and roadways.

2. How Does the Calculator Work?

The calculator uses the Bridge Law formula:

Where:

• \( W \) — Maximum legal weight (lbs)
• \( L \) — Length between extreme axles (feet)
• \( N \) — Number of axles

Explanation: The formula accounts for weight distribution across axles and the vehicle's length to determine safe maximum weights.

3. Importance of Weight Calculation

Details: Proper weight calculation is crucial for road safety, preventing bridge damage, and ensuring compliance with transportation regulations.

4. Using the Calculator

Tips: Enter the length between extreme axles in feet and the number of axles (minimum 2). All values must be valid (length > 0, axles ≥ 2).

5. Frequently Asked Questions (FAQ)

Q1: Why is the Bridge Law important?
A: It prevents excessive stress on bridges and roadways by limiting vehicle weights based on their configuration.

Q2: What's the minimum number of axles allowed?
A: The formula requires at least 2 axles for weight distribution calculations.

Q3: How is length measured for this calculation?
A: Length is measured between the centers of the first and last axles of the vehicle.

Q4: Are there exceptions to Bridge Law limits?
A: Some states may have special permits for oversize/overweight loads with specific restrictions.

Q5: How does adding axles affect maximum weight?
A: Generally, adding axles allows for higher total weight by distributing the load across more points.