The Tay Bridge carries the railway across the Firth of Tay in Scotland between Dundee and the suburb of Wormit in Fife. Its span is 2.75 miles. It is the second bridge to occupy the site.
A truss is an assembly of members such as beams, connected by nodes, that creates a rigid structure.
A truss bridge is a bridge whose load-bearing superstructure is composed of a truss, a structure of connected elements, usually forming triangular units. The connected elements may be stressed from tension, compression, or sometimes both in response to dynamic loads. The basic types of truss bridges shown in this article have simple designs which could be easily analyzed by 19th and early 20th-century engineers. A truss bridge is economical to construct because it uses materials efficiently.
A lattice bridge is a form of truss bridge that uses many small, closely spaced diagonal elements forming a lattice. The lattice Truss Bridge was patented in 1820 by architect Ithiel Town.
The Three Sisters are three similar self-anchored suspension bridges spanning the Allegheny River in downtown Pittsburgh, Pennsylvania at 6th, 7th, and 9th streets, generally running north/south. The bridges have been given formal names to honor important Pittsburgh residents:
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. Girders are commonly used to build bridges.
A lattice girder is a truss girder where the load is carried by a web of latticed metal.
A Howe truss is a truss bridge consisting of chords, verticals, and diagonals whose vertical members are in tension and whose diagonal members are in compression. The Howe truss was invented by William Howe in 1840, and was widely used as a bridge in the mid to late 1800s.
The Hares Hill Road Bridge is a single-span, wrought iron, bowstring-shaped lattice girder bridge. It was built in 1869 by Moseley Iron Bridge and Roof Company and is the only known surviving example of this kind. The bridge spans French Creek, a Pennsylvania Scenic River.
In structural engineering, a Warren truss or equilateral truss is a type of truss employing a weight-saving design based upon equilateral triangles. It is named after the British engineer James Warren, who patented it in 1846.
The Clinton Falls Bridge, also known as the Old Mill Bridge and formally as Bridge L-5573, is a historic steel Pratt through truss bridge that spans the Straight River in Clinton Falls Township, Minnesota. It was listed on the National Register of Historic Places in 1997 as Bridge No. L-5573 for having local significance in the theme of engineering. It was nominated for being an example of early steel truss bridge design in Minnesota.
Gaunless Bridge was a railway bridge on the Stockton and Darlington Railway. It was completed in 1823 and is one of the first railway bridges to be constructed of iron and the first to use an iron truss. It is also of an unusual lenticular truss design.
A balloon flange girder or (colloquially) balloon topper is a form of vertical I-beam wrought iron plate girder, where the top flange, instead of being a simple flat plate, is extended into a hollow tube. When a girder is subjected to a positive bending moment the top flange acts in compression making a flat plate flange more susceptible to local buckling than the balloon flange is.
Meldon Viaduct carried the London & South Western Railway (LSWR) across the West Okement River at Meldon on Dartmoor in Devon, South West England. The truss bridge, which was constructed from wrought iron and cast iron not stone or brick arches, was built under the direction of the LSWR's chief engineer, WR Galbraith. After taking three years to build, the dual-tracked bridge opened to rail traffic in 1874. Usage was limited to certain classes of locomotive because the viaduct had an axle load limit. Although regular services were withdrawn in 1968, the bridge was used for shunting by a local quarry. In the 1990s the remaining single line was removed after the viaduct was deemed to be too weak to carry rail traffic.
The Longford Railway Bridge is a railway bridge spanning the South Esk River, in Longford, Tasmania. The Western Railway Line travels over the bridge, enabling freight movement to/from the major Container ports of Burnie and Devonport and the rest of the state. In 1978, it was listed in the now-defunct Register of the National Estate.
The Macdonald River railway bridge is a heritage-listed railway bridge that carries the Main Northern line across the Macdonald River located in Woolbrook, in the Walcha Shire, New South Wales, Australia. The railway bridge was designed by John Whitton as the Engineer-in-Chief for the New South Wales Government Railways and built during 1882 by J. S. Bennett, with iron work by J. & C. Brettell, Worcester, England. The railway bridge is also known as the Woolbrook rail bridge over the Macdonald River and the Woolbrook Lattice Railway Bridge. The bridge and adjacent infrastructure is owned by RailCorp, an agency of the Government of New South Wales. The bridge was added to the New South Wales State Heritage Register on 2 April 1999 and was added to the Register of the National Estate on 18 April 1989.
Old Cobram-Barooga Bridge is a heritage-listed former road bridge and now footbridge over the Murray River at Barooga-Cobram Road, Barooga, New South Wales, Australia. The bridge links Barooga with Cobram, its sister town in Victoria. It was designed by Ernest de Burgh (engineer) and the New South Wales Department of Public Works and built from 1900 to 1902. It is also known as RMS Bridge No 3247. It is owned by Transport for NSW. It was added to the New South Wales State Heritage Register on 1 April 2016.
The Dubbo rail bridge over Macquarie River - Wambuul is a heritage-listed railway bridge on the Main Western line across the Macquarie River, located west of the Dubbo central business district in New South Wales, Australia. It was designed by John Whitton as the Engineer-in-Chief for the New South Wales Government Railways. The bridge was built during 1884 by Benjamin Barnes, with ironwork by Cochrane & Co, Middlesborough, England. The railway bridge is also known as the Dubbo Lattice Railway Bridge. The property is owned by RailCorp, an agency of the Government of New South Wales. The bridge was added to the New South Wales State Heritage Register on 2 April 1999 and was listed on the Register of the National Estate on 18 April 1989.
The Long Cove Creek railway viaducts are heritage-listed railway viaducts which carry the Main Suburban railway line over Long Cove Creek between the suburbs of Lewisham and Summer Hill in Sydney, New South Wales, Australia. The viaducts were designed and built by the New South Wales Government Railways. The property is owned by RailCorp, an agency of the Government of New South Wales. It was added to the New South Wales State Heritage Register on 2 April 1999.
The Grandfey-Viaduct is on the railway line from Bern to Fribourg and is one of the largest bridges in Switzerland.
