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The Bollman Bridge is a two-span through-truss, resting on granite abutments at each end and a granite pier in the middle of the river. The truss structure is a mixture of wrought and cast iron. The truss configuration is the design patented by Bollman as the "Bollman suspension truss" in 1852.
Bollman used the idea of redundancy of members so that his truss systems did not fail. Although abstract theory was often used to design bridges during this time period, Bollman used math and modeling instead. [1] Bollman's Bridge Patent (1852) Ilchester, Maryland, Bollman truss bridge over Patapsco River. The bridge was destroyed by a flood.
English: Wendel Bollman's bridge patent. On January 6, 1852, Bollman was awarded patent No. 8,624 for his unique design for railroad bridges known as the Bollman truss. This is a diagram of the various features of the bridge patent and its members.
The Bollman Truss Railroad Bridge at Savage, Maryland, United States is the only surviving example of a revolutionary design in the history of American bridge engineering. The type was named after its inventor, Wendel Bollman , a self-educated Baltimore engineer.
Designed by the self-taught civil engineer Wendel Bollman in 1871, this truss bridge is the last remaining span of the Pittsburgh Division line associated with Bollman. Around 1910, it was moved from Wills Creek to a location 1.5 miles (2.4 km) north of Meyersdale, Pennsylvania , after it was no longer able to safely carry heavier modern ...
At the beginning of the trail is a Bollman truss bridge, which was used by the Baltimore and Ohio Railroad during the middle of the 19th century. The Bollman truss bridge was invented in 1850 and was the first system to be made entirely of iron. This bridge was built in 1869 and is the only remaining Bollman truss bridge of its design in the ...
[16] [17] The Thomas Viaduct at Relay, Maryland, was the longest bridge in the United States upon its completion in 1835. It also remains in use. The B&O made extensive use of the Bollman iron truss bridge design in the mid-19th century. Its durability and ease of assembly aided faster railroad construction.
Bollman Truss Bridge: Extant Pratt truss: 2007 Westminster: Carroll: MD-174: Gilpin's Falls Covered Bridge: Extant Burr truss: 1860 2012 MD 272 (North East Road) (former) North East Creek: North East: Cecil