Covered bridge
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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. The purpose of the covering is to protect the wooden stru
The Cogan House Covered Bridge, Pennsylvania
Spreuer Bridge in Lucerne
Schuylkill Permanent Bridge in Philadelphia, the first documented covered bridge in America
Covered bridge in Macon, Georgia, 1877
Burr Truss
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The Burr Arch Truss—or, simply, Burr Truss or Burr Arch—is 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
Interior structure of a covered bridge utilizing a kingpost with a Burr Arch structure
Example of a Burr Truss – Baumgardener's Covered Bridge in Lancaster County, Pennsylvania, U.S.
Sim Smith Covered Bridge, Parke County, Indiana. Notice the arch projects below the lower chords of the bridge.
Mansfield Covered Bridge, Parke County, Indiana. The roof was missing after a major storm and the interior design was easier to see.