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Fallasburg Bridge

Fallasburg Bridge
FallasburgBridge Overall DownstreamApproachDSCN9984.JPG
East Approach
Carries Covered Bridge Road
Crosses Flat River
Locale Lowell, Michigan
Maintained by Kent County Road Commission
Characteristics
Design Brown truss Covered bridge
Total length 100 feet (30 m)
Longest span 97.8 feet (29.8 m)
Load limit 3 short tons (2.7 t)
History
Opened 1871
Closed in use
Statistics
Toll

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Fallasburg Covered Bridge
Fallasburg Bridge is located in Michigan
Fallasburg Bridge
Fallasburg Bridge is located in the US
Fallasburg Bridge
Nearest city Lowell, Michigan
Coordinates 42°58′51″N 85°19′38″W / 42.98083°N 85.32722°W / 42.98083; -85.32722Coordinates: 42°58′51″N 85°19′38″W / 42.98083°N 85.32722°W / 42.98083; -85.32722
Architectural style Other, Lattice-work Truss
NRHP Reference # 72000627
Added to NRHP March 16, 1972

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Fallasburg Bridge (alternatively Fallassburgh Bridge) is a 100-foot (30 m) span Brown truss covered bridge, erected in 1871 in Vergennes Township, Michigan, United States, 5 miles (8.0 km) north of Lowell on the Flat River. Carrying Covered Bridge Road across the Flat, it is located in the Fallasburg Historical District south of Whites Bridge and Smyrna. It is listed on the National Register of Historic Places, and along with Whites Bridge, Langley Covered Bridge, and Zehnder's Holz Brucke, is one of only four Michigan covered bridges open to vehicle traffic.

The bridge uses the Brown truss system, a through truss consisting of diagonal compression beams and (optionally) almost vertical tension members (slanting in at the top toward the center of the span). This system was patented by Josiah Brown of Buffalo, New York, in 1857. The Brown truss is similar to the Howe arrangement of "X" bracing and counter bracing, but uses lighter members and less timber. It contains no upright compression members and uses no iron except for bolt connectors at the timber intersections. Builders used the Brown truss successfully in at least four covered bridges in Michigan, three of which (Ada Covered Bridge, Whites Bridge and this one) are still in existence. The Brown truss was thus briefly popular in Michigan but did not gain wide acceptance elsewhere.

The bridge currently rests on concrete and fieldstone footings at each end put in place in 1905. As is typical for covered bridges, it is a frame structure with a gabled roof that is covered with creosote shingles. Its construction is of the through-truss type, and the white pine (sourced from Greenville, Michigan) trusses are completely sheathed on the outside with rough pine boards. The floor is 14 feet (4.3 m) wide and 100 feet (30 m) long and the bridge has an inside clearance of 12 feet (3.7 m).


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