A cantilever bridge is a bridge built using cantilevers, structures that project horizontally into space, supported on only one end. For small footbridges, the cantilevers may be simple beams; however, large cantilever bridges designed to handle road or rail traffic use trusses built from structural steel, or box girders built from prestressed concrete. The steel truss cantilever bridge was a major engineering breakthrough when first put into practice, as it can span distances of over 1,500 feet (460 m), and can be more easily constructed at difficult crossings by virtue of using little or no falsework.
Beam bridges, also known as stringer bridges, are the simplest structural forms for bridge spans supported by an abutment or pier at each end. No moments are transferred throughout the support, hence their structural type is known as simply supported.
A plate girder bridge is a bridge supported by two or more plate girders.
A box girder bridge is a bridge in which the main beams comprise girders in the shape of a hollow box. The box girder normally comprises either prestressed concrete, structural steel, or a composite of steel and reinforced concrete. The box is typically rectangular or trapezoidal in cross-section. Box girder bridges are commonly used for highway flyovers and for modern elevated structures of light rail transport. Although normally the box girder bridge is a form of beam bridge, box girders may also be used on cable-stayed bridges and other forms.
A girder is a support beam used in construction. It is the main horizontal support of a structure which supports smaller beams. Girders often have an I-beam cross section composed of two load-bearing flanges separated by a stabilizing web, but may also have a box shape, Z shape, or other forms. A girder is commonly used to build bridges.
The Medium Girder Bridge (MGB) is a lightweight, man portable bridge and can be assembled without help from heavy equipment. In addition, it is also a deck type, two-girder bridging system capable of carrying loads up to and including Main battle tanks (MBT).
The Dee Bridge disaster was a rail accident that occurred on 24 May 1847 in Chester, resulting in five fatalities. It revealed the weakness of cast iron beam bridges reinforced by wrought iron tie bars, and brought criticism of its designer, Robert Stephenson, the son of George Stephenson.
A tied-arch bridge is an arch bridge in which the outward-directed horizontal forces of the arch(es) are borne as tension by a chord tying the arch ends, rather than by the ground or the bridge foundations. This strengthened chord may be the deck structure itself or consist of separate, deck-independent tie-rods.
A girder bridge is a bridge that uses girders as the means of supporting its deck. The two most common types of modern steel girder bridge are plate and box.
A box or tubular girder is a girder that forms an enclosed tube with multiple walls, rather than an I or H-beam. Originally constructed of riveted wrought iron, they are now found in rolled or welded steel, aluminium extrusions or prestressed concrete.
A lattice girder is a truss girder where the load is carried by a web of latticed metal.
Girder and Panel Building Sets were a series of plastic toy construction kits created by Kenner Toys in the mid-1950s.
A pin and hanger assembly is used to connect two plate girders of a bridge. These assemblies are used to provide an expansion joint in the bridge. One beam is set on a pier with a short section cantilevered out toward the next pier. The other 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, holding up the suspended span while allowing it to move longitudinally. Large washers are bolted to each end of the pin to retain the hangers. Exceptionally long spans may have two sets of girders cantilevered from opposite bridge piers with a third set of girders suspended by pin and hanger assemblies from both cantilevers.
Redcliffe Bridge is a traffic bridge which carries Tonkin Highway across the Swan River in the Perth, Western Australia suburb of Redcliffe.
The Interstate 635 Bridge is an automobile crossing of the Kansas River in Kansas City, Kansas.
The bridge was built in 1976, and work to rebuild it started 2003, and finished by 2005. During the rebuild process, the bridge underwent repairs, was resurfaced, and the girder beams were replaced in some places.
The U.S. 40 and 59 Bridges are twin multi-beam girder bridges over the Kansas River at Lawrence, Kansas.
The west bridge carries two lanes of southbound traffic, connecting to Vermont Street, while the east bridge carries two lanes of northbound traffic from Massachusetts Street. Both bridges converge on the north end to become North 2nd Street. The east bridge is also the third bridge to be built at this location.
The Kansas Turnpike Bridges are a pair of multi-beam girder bridge that carry the Kansas Turnpike and Interstate 70 over the Kansas River at Lawrence, Kansas.
A deck is the surface of a bridge. A structural element of its superstructure, it may be constructed of concrete, steel, open grating, or wood. Sometimes the deck is covered a railroad bed and track, asphalt concrete, or other form of pavement for ease of vehicle crossing. A concrete deck may be an integral part of the bridge structure or it may be supported with I-beams or steel girders.
Bridge No. 90646, also known as the Wooddale Avenue Bridge, is a multi-plate steel arch bridge that carries a local street over Minnehaha Creek in Edina, Minnesota, United States. The bridge was listed on the National Register of Historic Places in February 2016.
The Passaic Street Bridge is a vehicular bridge crossing the Passaic River in Passaic and Garfield, New Jersey. The girder bridge was built in 1898 and is the third to span the river at that point.
It is considered eligible for listing on the New Jersey Register of Historic Places National Register of Historic Places.
