Civil Engineering Association

A Comparison of AASHTO Bridge Load Rating Methods

This report documents an analysis of 1,500 bridges that represent various material types and configurations using AASHTOWare™ Virtis® to compare the load factor rating to load and resistance factor rating for both moment and shear induced by design vehicles, AASHTO legal loads, and eight additional permit/legal vehicles. The report includes proposed revisions to the "AASHTO Manual for Bridge Evaluation" based on a review of the analysis results. The material in this report will be of immediate interest to bridge engineers.

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