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Rating System Complements Bridge Design Specification
The nationwide implementation of the Load and Resistance Factor Design (LRFD) Specification for bridges has resulted in greater reliability of bridges, more efficient designs, and a more uniform factor of safety. Now the Load and Resistance Factor Rating (LRFR) system is building on these advances to improve the safety of bridges through the use of state-of-the-art rating methodology for bridge loads.
The Federal Highway Administration (FHWA) has adopted a policy that, starting October 1, 2010, bridges designed with LRFD be load rated with LRFR. FHWA considers LRFR to be the preferred load rating methodology for existing bridges as well. “LRFR allows you to better assess the safe carrying capacity of bridges, providing a uniform reliability for all bridges. With LRFR, you know what you’re getting,” says Firas Ibrahim of FHWA’s Office of Bridge Technology.
For more information: Firas Ibrahim, FHWA, tel: 202/366-4598; e-mail:...