A beam or "girder" bridge is the simplest and most ... creating what's known in the bridge world as a "continuous span." Lake Ponchartrain Causeway, Louisiana In fact, the world's longest bridge ...

A beam or "girder" bridge is the simplest and most ... creating what's known in the bridge world as a "continuous span." In fact, the world's longest bridge is a continuous span beam bridge.

For simple or continuous spans exceeding about 85 ft, plate girders may be the most economical type of construction. Used as stringers instead of rolled beams, they may be economical even for long ...