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3-Sided Bridges and Culverts

 

Three‑sided, flat‑decked rectilinear precast units placed segmentally onto a concrete foundation can be used to form a bridge. The units are tied together by grouted keyways preformed into the foundation and between units, or mechanically by lateral ties of post-tensioning strands or rods.

Most three‑sided bridge systems offer clear span units from 6 to 42 feet coupled with vertical clearances from 2 to 14 feet. This flexibility, coupled with the ability to cast skew angles up to 45 degrees, transitional and radial shapes, allows for a wide range of opening configurations. All of this ‑ and more ‑ allows for a completely precast project that is quick and efficient!

 

Typical Applications Include

  • Conventional bridge construction and replacement
  • Multiple cell installations for longer spans
  • Underground storm water detention structures
  • Tunnels
  • Most three sided bridge systems meet or exceed the following: AASHTO Specifications ACI Codes Variable Earth Dead Loads HS20, HS25, Alternate Military Live Loads
     

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Precast Concrete Association of Virginia
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