The Willow Hill Covered Bridge is a covered bridge located off U.S. Route 30 that spans Miller’s Run (which flows into Mill Creek , a tributary of the Conestoga River ) in Lancaster County , Pennsylvania , United States . It was built in 1962 by Roy Zimmerman as a reconstruction using parts of the Miller's Farm Covered Bridge , built in 1871 by Elias McMellen , and Good's Fording Covered Bridge , built in 1855. It crosses Miller's Run and is 93 feet (28 m) long and 15 feet (4.6 m) wide.
4-413: The bridge has a single span, wooden, double Burr arch trusses design with the addition of steel hanger rods. It is painted red, the traditional color of Lancaster County covered bridges, on the outside. The inside is unpainted. Both approaches to the bridge are painted in the traditional white color. The bridge's WGCB Number is 38-36-43. Because it was constructed from two historic covered bridges, it
8-470: A combination of an arch and a multiple kingpost truss design. It was invented in 1804 by Theodore Burr , patented on April 3, 1817, and used in bridges , usually covered bridges . 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
12-411: A load, this was done because it is impossible to evenly balance a dynamic load crossing the bridge between the two parts. The opposite view is also held, based on computer models, that the truss performs the majority of the load bearing and the arch provides the stability. Either way, the combination of the arch and the truss provides a more stable bridge capable of supporting greater weight than either
16-580: Is not listed on the National Register of Historic Places like most of the other covered bridges in the county. It is located at 40°1′30″N 76°12′11.9″W / 40.02500°N 76.203306°W / 40.02500; -76.203306 . This article about a bridge in Pennsylvania is a stub . You can help Misplaced Pages by expanding it . Burr arch truss The Burr Arch Truss —or, simply, Burr Truss or Burr Arch —is
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