Project Description

The 249-foot-long State Route 43 (SR43) Tied Arch Bridge is designed to carry high-speed trains over SR43 in Fresno County. The bridge's superstructure utilizes a combination of vertical and lateral force-resisting components. Vertical force resistance is achieved through a deck structure comprising precast concrete floor beams, two tie girders, steel hangers, and two arch ribs. Steel hangers, positioned between adjacent precast girders, transmit tension forces to the arch ribs. The thrust force in the arch rib is countered by tension in the tie girder, with vertical loads transferred to the bearings through rigid end connections known as arch knuckles, located at each tie girder's ends.

In March 2024, all 28 precast concrete girders were placed over SR43. The bridge spans 249 feet in length and 52 feet in width, facilitating the passage of future high-speed trains over SR43 near Fresno.