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  2. Pin and hanger assembly - Wikipedia

    en.wikipedia.org/wiki/Pin_and_hanger_assembly

    The other (the suspended span) begins underneath the anchor span, and has its far end resting on the next pier. The beams have holes directly above each other. The two holes are connected using hangers, a pair of connecting plates sandwiching the bridge girders. A pair of large steel pins through the plates and girder webbing provide the hinges ...

  3. Girder bridge - Wikipedia

    en.wikipedia.org/wiki/Girder_bridge

    The stubs at the eastern end of the Dunn Memorial Bridge give a good cross section of girder bridge construction. A rolled steel girder is a girder that has been fabricated by rolling a blank cylinder of steel through a series of dies to create the desired shape. These create standardized I-beam and wide flange beam [7] shapes up to 100 feet in ...

  4. Incremental launch - Wikipedia

    en.wikipedia.org/wiki/Incremental_launch

    The bridges are mostly of the box girder design and work with straight or constant curve shapes, with a constant radius. 15-to-30-metre (49 to 98 ft) box girder sections of the bridge deck are fabricated at one end of the bridge in factory conditions. Each section is manufactured in around one week.

  5. Launching gantry - Wikipedia

    en.wikipedia.org/wiki/Launching_gantry

    Underslung (lower-beam) launching gantry used for Skyline guideway construction (2015). A launching gantry (also called bridge building crane, and bridge-building machine) is a special-purpose mobile gantry crane used in bridge construction, specifically segmental bridges that use precast box girder bridge segments or precast girders in highway and high-speed rail bridge construction projects.

  6. Plate girder bridge - Wikipedia

    en.wikipedia.org/wiki/Plate_girder_bridge

    [2] Plate girder bridges are suitable for short to medium spans and may support railroads, highways, or other traffic. Plate girders are usually prefabricated and the length limit is frequently set by the mode of transportation used to move the girder from the bridge shop to the bridge site. [3] Anatomy of a plate girder.

  7. Extradosed bridge - Wikipedia

    en.wikipedia.org/wiki/Extradosed_bridge

    An extradosed bridge employs a structure that combines the main elements of both a prestressed box girder bridge and a cable-stayed bridge. [1] [2]: 85 [3] The name comes from the word extrados, the exterior or upper curve of an arch, and refers to how the "stay cables" on an extradosed bridge are not considered as such in the design, but are instead treated as external prestressing tendons ...

  8. Pier (bridge structure) - Wikipedia

    en.wikipedia.org/wiki/Pier_(bridge_structure)

    The total height of the structure is generally between 1.5 a and 2.5 a. [7] The arches are semicircular, and their thickness T depends both on the span a of the arches and on the height H of the structure: [7] If H = 2.5 a, T = 0.1 a + 0.04H If H < 2.5 a, T = 0.125 a + 0.04H

  9. Beam bridge - Wikipedia

    en.wikipedia.org/wiki/Beam_bridge

    Beam bridges are the simplest structural forms for bridge spans supported by an abutment or pier at each end. [1] No moments are transferred throughout the support, hence their structural type is known as simply supported. The simplest beam bridge could be a log (see log bridge), a wood plank, or a stone slab (see clapper bridge) laid