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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.
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The Burkeville Covered Bridge is a historic covered bridge, carrying Main Poland Road over the South River in Conway, Massachusetts.Probably built in 1870, it is a regionally rare example of a multiple kingrod bridge with iron tensioning verticals (a modified Howe truss system), and one of a few 19th century covered bridges to survive in Massachusetts.
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The Howe truss, patented in 1840 by Massachusetts millwright William Howe, includes vertical members and diagonals that slope up towards the center, the opposite of the Pratt truss. [15] In contrast to the Pratt truss, the diagonal web members are in compression and the vertical web members are in tension.
The Braga Bridge is a continuous truss bridge. It was the fourth longest span of this type when it was completed in 1966. This list of continuous bridge spans ranks the world's continuous truss bridges in two listings: The first is ranked by the length of main span (the longest length of unsupported roadway) and the second by the total length of continuous truss spans.
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That same year, the two men formed a bridge-building firm, Boody, Stone & Co., [10] which erected a large number of Howe truss bridges throughout New England. [8] Howe made additional improvements, and patented a second Howe truss design in 1846. [2] William Howe suffered a severe carriage accident and died on September 19, 1852.