Ringos Mill Covered Bridge

The Ringos Mill Covered Bridge spans Fox Creek in Fleming County, Kentucky in a single 90-foot span. It was named for a grist mill situated 50 yards downstream.[2]

Ringos Mill Covered Bridge
U.S. National Register of Historic Places
Ringos Mill Covered Bridge
Location	13.7 miles south of Flemingsburg, Kentucky on Ky 158
Coordinates	38°16′06″N 83°36′38″W
Built	1867
Architectural style	Burr truss
NRHP reference No.	76000880[1]
Added to NRHP	March 26, 1976

The bridge's timbers are of yellow pine. It was probably built by the same contractor who constructed Hillsboro Covered Bridge several miles down Fox Creek. Abutments are of red stone covered with a concrete facing and the walls are double-sided with yellow poplar. Ventilation and light are provided by clerestory openings in the siding. The bridge is a good example of Theodore Burr's 1814 patented truss design that employs multiple kingposts. Patent bridges were the "bread and butter" of early engineers who typically received one dollar per linear foot of bridge construction for use of the patented design.[2]

'''''''Ringo's Mill is NOT a Burr truss. The definition of it and several other bridges as a "Burr truss" was proposed by Vernon White in a paper he wrote titled "A Treatise on the Burr Family of Trusses." Vernon had determined that the "multiple kingpost" truss was an unarched variation of the Burr and this information has been used frequently to describe these trusses in Kentucky. Vernon was a sociologist and had no formal training in structure. His treatise is generally accepted as flawed and not well researched.

The specific improvement that Burr advanced in bridge design was to place the roadway BETWEEN the arches as opposed over them. As the triangle is the most sturdy structure in engineering, use of the simple multiple kingpost was sensible in stiffening the arch.

The statement "Patent bridges were the 'bread and butter' of early engineers who typically received one dollar per linear foot of bridge construction for use of the patented design." is an overstatement. Burr rarely received royalties for use of his design. The premise of "one dollar per foot..." is specific to Ithiel Town who designed the Town lattice truss. Town was an astute businessman and had agents who sold his design for one dollar per foot. He charged two dollars per foot in penalty if it was discovered that a bridge builder had used his design without authorization. ''''Robert W. M. Laughlin'''''''''''''''

References

1. "National Register Information System". National Register of Historic Places. National Park Service. July 9, 2010.
2. "National Register Information System Application Form". National Register of Historic Places Nomination Form. National Park Service. Retrieved 2011-07-10.