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A covered bridge is a timber-truss bridge with a roof, decking, and siding, which in most covered bridges create an almost complete enclosure. [1] The purpose of the covering is to protect the wooden structural members from the weather.
A lattice truss bridge is a form of truss bridge that uses many small, closely spaced diagonal elements forming a lattice. The design was patented in 1820 by architect Ithiel Town .
This 86.5-foot-long (26.4 m), 18.66-foot-wide (5.69 m), Howe truss bridge was built in 1855. It was renovated by the Works Progress Administration in 1939, and by the city of Philadelphia in 2000. [2] It is the only remaining covered bridge in Philadelphia and is the only covered bridge in a major US city.
Examples of truss construction on covered bridges include Howe, Town Lattice, Queen-post, King-post, Haupt, Burr, Brown and Pratt. Of the existing historic covered bridges in Alabama, the Gilliland-Reese Covered Bridge and the Old Union Crossing Covered Bridge are classified as non-authentic based on their current construction.
Covered bridges are timber-truss bridges with a roof and siding which, in most covered bridges, create an almost complete enclosure. [1]The purpose of the covering is to keep snow from accumulating—winter snow accumulation could easily collapse a bridge, and the steep roof would tend to shed snow to either side.
The World Guide to Covered Bridges is published by the National Society for the Preservation of Covered Bridges (NSPCB). [1] It uses a covered bridge numbering system developed by John Diehl, the chairman of the Ohio Covered Bridge Committee. The committee first used the numbering system in 1953 to publish a list of covered bridges in Ohio. [2]
The bridge is believed to be the only standing covered bridge in the United States with a slate roof, a once-common local variant feature of area covered bridges. It has vertical weatherboard siding, with a small opening at the eaves. The bridge has a roadway width of 13 feet 6 inches (4.11 m).
Loux Covered Bridge is a historic wooden covered bridge located on Wismer Road crossing Cabin Run (creek) upstream from the Cabin Run Covered Bridge in Bedminster Township and Plumstead Township, Bucks County, Pennsylvania. It was built in 1874 by David Sutton out of hemlock in the Town Truss style.