Rairden Bridge
S of Big Horn Cty. Rd. CN9-30, Manderson, WYSingle-span, steel pin-connected 12-panel Pennsylvania through truss w/ sub-ties top chords: two channels w/ cover plates and lacing; bottom chords: paired flat eyebars; verticals: two channels w/ lacing; diagonals: paired flat eyebars or single square eyebars w/turnbuckles; struts: angle; sway bracing: angles in lattice configuration; lateral bracing: round bars; lattice guardrails.
Pratt truss configurations have also been used extensively for deck trusses in this country. Wyoming has no major deck trusses on its county road systems and only two on the state highway system. Both built in the early 1930s, represent two distinct forms of later truss design - the continuous deck truss and the cantilevered truss.
Listed in National Register of Historic Places in 1985.
The National Register of Historic Places is the official list of the Nation’s historic places worthy of preservation. Authorized by the National Historic Preservation Act of 1966, the National Park Service’s National Register of Historic Places is part of a national program to coordinate and support public and private efforts to identify, evaluate, and protect America’s historic and archeological resources.