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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 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 Hectorville Covered Bridge consists of two Town lattice trusses, 52.5 feet (16.0 m) long, with a structure width of 19.5 feet (5.9 m) and a roadway width of 16 feet (4.9 m) (one lane). The bridge's exterior is clad in vertical board siding, and it is covered by a metal gable roof.
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.
The bridge consists of two spans, 64.1 feet and 81.10 feet, with a 3.2 feet gap between them. The combined trussed portions of the bridge are 149.1 feet long. The bridge's Town lattice is an unusual design choice, but the later addition of the queen trusses are also unusual, resulting in a unique visual appearance by the bridge's unequal spans.
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 Fuller Covered Bridge is located on the north side of Montgomery village, on Fuller Bridge Road (a continuation of South Richford Road), just north of its junction with Black Falls Road. The bridge is a single-span Town lattice truss, 49.5 feet (15.1 m) long and 19.5 feet (5.9 m) wide, with a roadway width of 16 feet (4.9 m) (one lane).