Methods for combining both prestressing, high-performance steel and composite concrete
decks to improve bridge performance, construe-tibility, aesthetics, and economy are
reviewed. The designs are part of a study sponsored by the American Iron and Steel
Institute. Five bridge concepts have been developed to the preliminary design phase,
including plan details and cost comparisons. Single-and two-span bridges with span lengths
of between 24.4 and 54.9 m (80 and 180 ft) have been studied. The alternates developed …