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Truss

Old Wisla Bridge
Society: ASCEMain Category: CivilSub Category: BridgesEra: 1850-1859DateCreated: 1850-1857Vistula RiverTczewCountry: PolandWebsite: http://www.asce.org/Project/Old-Wisla-Bridge/Creator: Lentze, Carl

Conceived as one of the major structures on the Prussian Eastern Railway, the Old Wisla Bridge at Tczew originally consisted of six wrought iron spans. Due to Germany's invasion of Poland at the beginning World War II in 1939, only three original spans remain today. These remaining spans represent a unique technical monument of civil engineering achievements in the mid-nineteenth century.

YearAdded:
2004
Image Credit: Courtesy Wikicommons/Topory (CC BY-SA 3.0)Image Caption: Old Wisla BridgeEra_date_from: 1850
Whipple Truss Bridge
Society: ASCEMain Category: CivilSub Category: BridgesEra: 1850-1859DateCreated: 1855SchenectadyState: NYCountry: USAWebsite: http://www.asce.org/Project/Whipple-Truss-Bridge/Creator: Whipple, Squire

The Whipple Bowstring Truss Bridge was built from a design patented in 1841 by Squire Whipple. Whipple was the first person to understand the stresses in truss members and he developed the first theoretical formula to calculate stresses in the articulated truss. His bowstring truss was the first to use cast iron for compression and wrought iron for tension membranes.

YearAdded:
1981
Image Credit: Courtesy Wikicommons/RehrenbergImage Caption: A Whipple Bowstring Arch/Truss style bridge, built by S. DeGraff in Albany, NYEra_date_from: 1855
Walnut Street Bridge
Society: ASCEMain Category: CivilSub Category: BridgesEra: 1890-1899DateCreated: 1890Susquehanna RiverHarrisburdState: PAZip: 17101Country: USAWebsite: http://www.asce.org/Project/Walnut-Street-Bridge/Creator: Bollman, Wendel , Reeves, Samuel

The structure has two segments: an East Channel bridge consisting of four 175-foot spans and three 240-foot spans crossing from Harrisburg to City Island; and a West Channel bridge, consisting of seven 175-foot spans crossing from City Island to Wormleysburg.

With 15 truss spans totaling 2,820 feet, the Walnut Street Bridge is the finest and largest surviving example of the standardized Phoenix wrought-iron truss bridges produced from 1884 to 1923.

YearAdded:
1997
Image Credit: Courtesy Flickr/rjonesProject856 (cc-by-2.0)Image Caption: Walnut Street BridgeEra_date_from: 1890
Triborough Bridge Project
Society: ASCEMain Category: CivilSub Category: BridgesEra: 1930-1939DateCreated: 1936Robert F. Kennedy BridgeNew YorkState: NYZip: 10035Country: USAWebsite: http://www.asce.org/Project/Triborough-Bridge-Project/Creator: Moses, Robert , Ammann, Othmar

The Triborough Bridge Project is a three-branched waterway crossing that connects Manhattan, the Bronx, and Queens at a junction of the East River and the Harlem River in New York City. The complex structure includes a suspension bridge from Wards Island to Queens, a vertical lift span from Randall's Island to Manhattan, a fixed span (designed to be convertible to a lift span) across the Bronx Kills, viaducts, and an innovative three-legged roadway interchange.

YearAdded:
1986
Image Credit: Public Domain (National Park Service)Image Caption: Triborough Bridge ProjectEra_date_from: 1936
Poughkeepsie-Highland Bridge
Society: ASCEMain Category: CivilSub Category: BridgesEra: 1880-1889DateCreated: 1888Hudson RiverPoughkeepsieState: NYZip: 12528Country: USAWebsite: http://www.asce.org/People-and-Projects/Projects/Landmarks/Poughkeepsie-Highland-Bridge/, http://www.asce.org/Project/Poughkeepsie-Highland-Bridge/Creator: Clarke, Thomas , Macdonald, Charles

A bridge across the Hudson at or near Poughkeepsie was planned starting in the early 1870s to primarily carry coal from the coalfields of northeastern Pennsylvania to New England. At the time there were no bridges between Albany and New York Harbor. Horatio Allen, soon to be President of the ASCE, was its first Chief Engineer. He designed a multiple span suspension bridge. Later the American Bridge Company started construction on a five span bridge but went bankrupt before it completed the first pier foundations.

YearAdded:
2009
Image Credit: Courtesy Flickr/bobistraveling (CC BY 2.0)Image Caption: Poughkeepsie-Highland BridgeEra_date_from: 1888
The Tabernacle in December 2008
Society: ASCEMain Category: CivilSub Category: BuildingsEra: 1860-1869DateCreated: 1867Mormon TabernacleSalt Lake CityState: UTZip: 84150Country: USAWebsite: http://www.asce.org/Project/Mormon-Tabernacle/Creator: Grow, Henry

Just 20 years after settling the uninhabited Salt Lake valley, Brigham Young and his Mormon followers completed one of the nation's most impressive public structures. The 9,000-seat Mormon Tabernacle boasts a clear span roof measuring 150 feet by 250 feet, its timber trusses joined with wooden pegs and lashed with green rawhide, which shrank and tightened as it dried.

YearAdded:
1971
Image Credit: Courtesy Wikicommons/Leon7 (CC BY-SA 3.0)Image Caption: The Tabernacle in December 2008.Era_date_from: 1867
Bunker Hill Covered Bridge
Society: ASCEMain Category: CivilSub Category: BridgesEra: 1890-1899DateCreated: 1894Lyle CreekCatawba CountyState: NCCountry: USAWebsite: http://www.asce.org/Project/Bunker-Hill-Covered-Bridge/Creator: Ramsour, Andy, Haupt, Herman

In 1894, Catawba County, North Carolina commissioners asked local landowners to build and maintain an 85-foot-long bridge across Lyles Creek. The community hired Andy L. Ramsour, who served as keeper of the Horseford covered bridge over the Catawba River in Hickory, North Carolina.

YearAdded:
2001
Image Credit: Public Domain (National Park Service)Image Caption: Bunker Hill Covered BridgeEra_date_from: 1894
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