1. What is the Bridge Weight Calculation?

The bridge weight calculation determines the maximum safe weight for a vehicle crossing a bridge by taking the minimum of either the axle weight limits or the gross vehicle weight limit. This ensures compliance with bridge safety standards.

2. How Does the Calculator Work?

The calculator uses the bridge weight formula:

Where:

• \( Axle\ Limits \) — Maximum allowed weight per axle (lbs)
• \( Gross\ Limit \) — Maximum allowed total vehicle weight (lbs)

Explanation: The calculation ensures the vehicle doesn't exceed either the per-axle weight restrictions or the total weight restriction of the bridge.

3. Importance of Bridge Weight Calculation

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

4. Using the Calculator

Tips: Enter the axle weight limits and gross weight limit in pounds. Both values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: Why take the minimum of both values?
A: Using the minimum ensures compliance with both axle-specific and total weight restrictions, which is the most conservative and safe approach.

Q2: What are typical axle weight limits?
A: Limits vary by jurisdiction but common limits are 20,000 lbs per single axle and 34,000 lbs per tandem axle in the US.

Q3: How does this differ from road weight limits?
A: Bridge limits are often more restrictive than general road limits due to structural considerations.

Q4: Are there exceptions to these limits?
A: Some jurisdictions allow permits for overweight loads with special restrictions and routing.

Q5: How often are bridge weight limits updated?
A: Limits may change after bridge inspections or structural modifications, so always check current postings.