A value engineering alternate using precast, prestressed concrete led to the redesign of the 17-span bridge structure that provides two-level access to the terminal building at the new Austin-Bergstrom International airport in Austin, Texas. The $4.6 million structure is 1400 ft (427 m) long with typical span lengths of 80 ft (24.4 m). An innovative design using standard precast, prestressed trapezoidal Ubeams, together with stay-in-place deck panels, was employed. This design proved to be not only aesthetically attractive and structurally efficient, but also substantially reduced construction costs and construction time. This article presents the benefits and unique design features of the precast system, and describes the construction highlights of the project.
