Bridge Load Rating Calculator
Calculate bridge load rating factor using LRFR methodology. Determines if a bridge passes HL-93 design loading and whether posting is required.
Inputs
kip
kip
kip
Results
Rating Factor (RF)
1.34
Rating (Tons)
48.35 tons
Passes HL-93
1
Posting Required0
Operating Rating Factor1.74
Available Capacity312.5 kip
How to Use This Calculator
- Enter member capacity (C), dead load effect (D), live load effect (L), and dynamic load allowance.
- Set dead load factor and live load factor per AASHTO LRFD.
- Review the load rating factor — values ≥ 1.0 indicate the bridge passes for the design load.
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