Background Sonestown Covered Bridge



the south side , east portal of bridge , site of former mill in december 2008


covered bridges transition between stone , metal bridges, latter made of cast-iron or steel. in 19th-century pennsylvania, lumber abundant resource bridge construction, wood did not last long when exposed elements. roof , enclosed sides of covered bridges protected structural elements, allowing of these bridges survive on century. burr arch truss consists of load-bearing arch sandwiching multiple king posts, resulting in stronger , more rigid structure 1 made of either element alone. although there 30 covered bridges in sullivan county in 1890, 5 left 1954, , of 2015 only 3 remain: forksville, hillsgrove, , sonestown.








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