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Bridge design is a core competency at PND, with a number of award-winning structures designed by our staff, including awards from the American Institute of Steel Construction, the Steel Bridge Alliance and others. We have produced nearly 300 bridge designs of many sizes and types, including cable stayed, arch, plate girder, box girder, orthotropic, pre-stressed and post-tension concrete, trusses, and specialty bridges. We have designed highway, pedestrian, and railroad bridges using a variety of materials, including timber, concrete, steel, fiber-reinforced plastic, and steel strand, all used in combination or individually as dictated by the best design practices for each site.

PND’s bridge expertise encompasses site and type selection; hydrology and hydraulics; geotechnical; seismic; structural design; cost estimation, construction inspection; and existing bridge evaluations. Our experience includes soils investigations for foundation designs and the design of piles for bridge foundations and piers.

  • Highway Bridges
  • Bridge Widening
  • Pedestrian Bridges
  • Recreational Bridges
  • Railroad Bridges
  • Steel I Girder Bridges
  • Timber Glulam Bridges
  • Timber Truss Bridges
  • Covered Timber Bridges
  • Floating Bridges
  • Pre-stressed Concrete Bridges
  • Concrete Slab Bridges
  • Steel Truss Bridges
  • Steel Box Girder Bridges

PND follows standard design practices on the majority of designs; however, innovation leading to improved function, safety, and cost reduction often requires a judicious application of fundamental engineering to assure the best solution is obtained.

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