1. What is the Oregon Bridge Formula?

The Oregon Bridge Formula is used to determine the maximum allowable weight that can be carried on a group of axles based on the distance between the axles. It helps ensure truck weights are distributed properly to prevent damage to road infrastructure.

2. How Does the Calculator Work?

The calculator uses the Oregon Bridge Formula:

Where:

• \( L \) — Length between axles in feet
• 600 — Constant multiplier (lbs per foot)
• 40 — Constant adjustment factor (feet)

Explanation: The formula calculates the maximum gross weight that can be carried on any group of two or more consecutive axles.

3. Importance of Weight Calculation

Details: Proper weight distribution is crucial for road safety, bridge protection, and compliance with transportation regulations. Overweight vehicles can cause significant damage to infrastructure.

4. Using the Calculator

Tips: Enter the distance between axles in feet. The distance must be greater than 0. The calculator will determine the maximum allowable weight for that axle configuration.

5. Frequently Asked Questions (FAQ)

Q1: Does this formula apply to single axles?
A: No, this formula is specifically for groups of two or more consecutive axles. Single axles have different weight limits.

Q2: How does this differ from the federal bridge formula?
A: The Oregon Bridge Formula is simpler than the federal formula, which has different calculations based on the number of axles and spacing.

Q3: What's the minimum axle spacing this applies to?
A: The formula is valid for axle spacings of 4 feet or more. Closer spacings have special considerations.

Q4: Are there exceptions to these weight limits?
A: Some vehicles may qualify for special permits allowing higher weights under specific conditions.

Q5: How often should weight calculations be checked?
A: Calculations should be verified whenever vehicle configurations change or when carrying different loads.