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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 Fink truss was designed by Albert Fink of Germany in 1854. This type of bridge was popular with the Baltimore and Ohio Railroad . The Appomattox High Bridge on the Norfolk and Western Railway included 21 Fink deck truss spans from 1869 until their replacement in 1886.
Interior of a barn with a Fink truss, with the characteristic W shape. Fink design trusses are used today for pedestrian bridges and as roof trusses in building construction in an inverted (upside down) form where the lower chord is present and a central upward projecting vertical member and attached diagonals provide the bases for roofing. [9]
For more truss types, see truss types used in bridges. A large timber Howe truss in a commercial building. There are two basic types of truss: The pitched truss, or common truss, is characterized by its triangular shape. It is most often used for roof construction. Some common trusses are named according to their "web configuration".
Albert Fink (October 27, 1827 – April 3, 1897) was a German-born civil engineer who worked in the United States. He is best known for his railroad bridge designs, which helped revolutionize the use of iron for American railroad bridge construction. He devised the Fink truss and many truss bridges, especially the Fink-Type Truss Bridge.
This may have been a factor in choosing the bridge over ferry option. The design comprised three 19-metre (63 ft) king trusses, a 31-metre (103 ft) howe truss, a 37-metre (123 ft) howe truss, and a 43-metre (140 ft) steel swing span. [7] The bridge opened to traffic in December 1909, but the official opening was March 1910. [5]
The Belfast truss is a cross between Town's lattice truss and the bowstring truss. It was developed in Ireland as a wide-span shallow rise roof truss for industrial structures. McTear & Co of Belfast, Ireland began fabricating these trusses in wood starting around 1866. By 1899, spans of 24 metres (79 ft) had been achieved, and in the 20th ...
Built in 1858, the 115-foot (35 m) bridge is a combination of Howe truss and Queen-post truss construction over a single span. Its WGCB number is 01-61-02. The Waldo Covered Bridge is currently eligible for addition to the National Register of Historic Places. It is the second oldest surviving covered bridge in the state, although it is also ...