![]() The layer, or layers of material of designed thickness placed on a subbase or a subgrade to support a surface course. Soil or rock placed behind and within the abutment and wingwalls to fill the unoccupied portion of a foundation excavation. Plates are assembled into various shapes, including, round, single-radius arch, multiple-radius arch, box culvert, and special shapes.9 Backfill Two types of corrugation profiles are available, Type I deep corrugated structural plate has a 15 x 5 ½ inch corrugation and Type II deep corrugated structural plate has a 16 x 6 inch corrugation. These bridge structures are ideal for grade separations or hydraulic applications. The plates are assembled into various shapes that include round, pipe arch, singles-radius arch, horizontal ellipse, low profile arch, high profile arch, pear, underpass and vertical ellipse and special shapes.9ĭeep corrugated buried bridge: The latest innovation in Soil Steel Bridges, Deep Corrugated Structural Plate is available in spans up to 80 ft and thicknesses from 0.140 to 0.314 inches. The corrugated sections are commonly referred to as plates and have a standard corrugation profile of 6 x 2 inches that are formed perpendicular to the length of the culvert bridge. Structural plate culvert steel: structural plate consists of corrugated steel sections that are bolted together to form the required shape. Can be cast-in-place or precast steel reinforced concrete. Can be single span or multiple span if it has piers.Ĭoncrete box culvert: A square or rectangular, “box” shaped culvert under a roadway. B- Bridge:Ī bridge forms part of the roadway and is usually more than 20 feet long. 10 Animal UnderpassĪnimals passage under vehicle traffic via a Bridge or Culvert. Also called ecoduct, green bridge, land bridge, biobridge, wildlife bridge or Animal overpass, landscape connectors, wildlife overpass, Wildlife Crossing Structure or wildlife overcrossing. 7 Animal OverpassĪ grade separation structure designed to allow wildlife to cross over an intersecting highway or railroad. ![]() 5 Also, the part of a structure (such as an arch or a bridge) that directly receives thrust or pressure. AbutmentĪ substructure supporting the end of a single span or the extreme end of a multiple span superstructure retaining or supporting an approach embankment. American Association of State Highway and Transportation Officials.
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