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A simple lattice truss will transform the applied loads into a thrust, as the bridge will tend to change length under load. This is resisted by pinning the lattice members to the top and bottom chords, which are more substantial than the lattice members, but which may also be fabricated from relatively small elements rather than large beams.
A covered bridge is a timber-truss bridge ... and spanned over a mile in length, ... The 1,282-foot (391 m) Hartland Bridge in New Brunswick is the longest covered ...
The bridge is a single-span Town lattice truss structure, with a total length of 121 feet (37 m), and a width of 18.5 feet (5.6 m) and a roadway width of 15 feet (4.6 m), sufficient for one modern travel lane.
It is a single-span Town lattice truss, 59 feet (18 m) long and 19.5 feet (5.9 m) wide, with a roadway width of 16 feet (4.9 m) (one lane). It is covered by a gabled roof, and its exterior is finished in vertical board siding, which is wrapped around to the insides of the portals. The siding ends before the roof eaves, leaving an open strip.
The bridge spans the Trout River in an east–west orientation. It is of Town lattice truss design, 91 feet (28 m) in length and 19.5 feet (5.9 m) in width, with a roadway width of 16 feet (4.9 m) (one lane). It is covered by a gabled roof, and is sheathed by vertical board siding, which extends a short way inside the portals to shelter the ...
The bridge consists of flanking Town lattice trusses 84.5 feet (25.8 m) long. The bridge is 19.5 feet (5.9 m) wide, with a roadway width of 16 feet (4.9 m) (one lane). The exterior is finished in vertical board siding, which extends around to the interior of the portals.
The bridge is a single-span structure of Town lattice design, set on abutments of stone and concrete. It is 56.5 feet (17.2 m) long and 20.5 feet (6.2 m) wide, with a roadway width of 17.5 feet (5.3 m). Iron tie rods join the tops of the flanking trusses to provide lateral stability, and the bridge deck is made of wooden planking.
The bridge was built in 1875, and is 85 feet 11 inches (26.2 m) in length. The Waterford Covered Bridge is one of two remaining covered bridges in Erie County, along with the Harrington Covered Bridge. The bridge is also the only Town lattice truss bridge in the county and one of only 19 in Pennsylvania.