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The design principle behind the Burr arch truss is that the arch should be capable of bearing the entire load on the bridge while the truss keeps the bridge rigid. Even though the kingpost truss alone is capable of bearing a load, this was done because it is impossible to evenly balance a dynamic load crossing the bridge between the two parts. [5]
Theodore Burr (August 16, 1771 – November 22, 1822) was an inventor from Torrington, Connecticut, who was credited with the Burr Arch Truss bridge design. He designed and built one of the first bridges across the Hudson River and several bridges that crossed the Susquehanna River .
The bridge design used his Burr arch truss. "This ultimate achievement of Burr's on the Susquehanna, having in all eighteen 200-foot trussed arch wooden spans, eight between the west shore and a first island, two between that and a second island, and eight more between that and the east shore, and a total length of 4,170 feet, was to be ...
Mansfield Covered Bridge: Extant Burr truss: 1867 1982 CR 145 (Martin Road) Big Raccoon Creek Mansfield: Parke: IN-45: Medora Bridge: Bypassed Burr truss: 1875 1982 SR 235 (former) East Fork of White River: Medora: Jackson
Morgan Bridge: Extant Queen post truss 1886 2004 Morgan Bridge Road Lamoille River north branch Belvidere: Lamoille: VT-34: Village Bridge: Extant Burr truss: 1833 2004 Bridge Street Mad River: Fayston: Washington
Kennedy Bridge is a historic wooden covered bridge located in East Vincent Township, Chester County, Pennsylvania. It is a 96-foot-long (29 m), Burr truss bridge, constructed in 1856. It was damaged and repaired after a flood in 1884 and reinforced in 1936.
The Arthur A. Smith Covered Bridge is a historic covered bridge, carrying Lyonsville Road across the North River in Colrain, Massachusetts, United States. Built in 1869, it is the only Burr truss bridge in the state, and is one of a few 19th century covered bridges in the state. It was listed on the National Register of Historic Places in 1983. [1]
Landis Mill Covered Bridge was built in 1873 by Elias McMellen at a cost of $969. McMellen, who built many of Lancaster's covered bridges using the Burr arch truss, chose to build this short bridge using a simpler design with multiple kingpost trusses and, instead of Burr arches, pyramidal-shaped trusses to add additional support. [3]