covered bridge

Encyclopedia Britannica
Encyclopedia

covered bridge

timber-trusstimber-truss structure carrying a roadway over a river or other obstacle, popular in folklore and art but also of major significance in engineering history. The function of the roof and siding, which in most covered bridges create an almost complete enclosure, is to protect the wooden structural members from the weather. A truss is a basic form in which the members are arranged in a triangle or series of triangles.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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