The Evolution of Bridges in the United States
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The Evolution of Bridges in the United States 67.1 67.2 67.3 Introduction Early U.S. Bridges The Canal Era Turnpikes • Timber Bridges • Covered Timber Bridges • Iron Bridges 67 67.4 The Railroad Era Trusses • Railroad Trestles • Steel Arch Bridges • Kit Bridges 67.5 The Motor Car Era Steel Truss Bridges • Reinforced Concrete • Concrete Arches • Concrete Girders • Canticrete • Suspension Bridges • Movable Bridges • Floating Bridge 67.6 The Interstate Era Concrete Box Girders • Prestressed Concrete • Composite Steel • A Resurgence of Steel • Steel Girders • Steel Box Girders and Orthotropic Steel Decks ...
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