Concrete Arch Bridges may consist of either a single arch or multiple arches supported by abutments and intermediate piers.

  • Most efficient shape for supporting gravity loads.
  • Economical way to traverse small distances.

Box Beam

A box beam bridge is supported by abutments and piers in the same way as a simple- or continuous beam bridge.

  • Common bridge type, especially for low-volume roads.
  • Well-suited for spans from 50 feet to 120 feet.
  • Common widths of 36 or 48 in.


A more recent type of bridge currently gaining popularity as a "signature" structure is the cable-stayed bridge with a cast-in-place, reinforced, or segmental deck.

  • Economical and aesthetically pleasing.
  • Economical way to traverse small distances.


A simple beam bridge is commonly used for moderate spans. Variations of the precast I-girder include the PCI bulb-tee or bulb-tee sections developed by various states.

  • Most popular bridge type.
  • Well-suited for spans up to 160 feet.
  • Common depths: 20 in., 36 in., 45 in., 54 in., and 72 in.


Segmental bridges are popular when the construction site is restricted. They can be cast-in-place or precast, and can employ span-by-span or balanced cantilever construction.

  • Perfectly suited for gradual and sharply curved alignments.
  • Maximum span is greater than 300'.
  • Repetition of short spans: 70 feet to 150 feet.


Slab bridges may be composed of single or multiple spans. Features:

  • Simple, easy to construct.
  • Well-suited for spans up to 50 feet.
  • For longer spans, continuity with abutments and piers can mobilize frame action.