what was the reason behind its construction?
To have a stronger and more rigid structure than other bridges.
Hillsgrove Covered Bridge
Covered bridges were a transition between stone and metal bridges, the latter made of cast-iron or steel. In 19th-century Pennsylvania, lumber was an abundant resource for bridge construction, but did not last long when exposed to the elements. The roof and enclosed sides of covered bridges protected the structural elements, allowing some of these bridges to survive for well over a century. A Burr arch truss consists of a load-bearing arch sandwiching multiple king posts, resulting in a stronger and more rigid structure than one made of either element alone. A
what is hillsgrove covered bridge? A Burr arch truss covered bridge in U.S.
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Hillsgrove Covered Bridge [SEP] Background
In 19th-century Pennsylvania, lumber was an abundant resource for bridge construction, but did not last long when exposed to the elements. The roof and enclosed sides of covered bridges protected the structural elements, allowing some of these bridges to survive for well over a century. A Burr arch truss consists of a load-bearing arch sandwiching multiple king posts, resulting in a stronger and more rigid structure than one made of either element alone. Although there were 30 covered bridges in Sullivan County in 1890, only five were left by 1954, and as of 2015 only three remain: Forksville, Hillsgrove, and Sonestown.