For civil and structural engineers specializing in transportation infrastructure, few documents carry as much weight as the AASHTO LRFD Bridge Design Specifications . Since its first release in 1994, the Load and Resistance Factor Design (LRFD) framework has revolutionized how bridges are conceived, analyzed, and built across the United States and worldwide. Among the various editions released over the past three decades, the , holds a unique and critical position.
The 2010 edition formalizes the fundamental LRFD equation: