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A trestle bridge is a bridge composed of a number of short spans supported by closely spaced frames. A trestle (sometimes tressel) is a rigid frame used as a support, historically a tripod used to support a stool or a pair of isosceles triangles joined at their apices by a plank or beam such as the support structure for a trestle table .
Railway trestle bridge in Dawson Creek, British Columbia. A trestle bridge is composed of a number of short spans supported by closely spaced trestle frames. Each supporting frame is a bent. A trestle differs from a viaduct in that viaducts have towers that support much longer spans and typically have a higher elevation. [1]
Type Sub-type Length range Image Longest span Arch bridge: 575 meters (Ping'nan Third Bridge, Guangxi, Southern China) Through arch bridge: Beam bridge (Integral beam bridge) [1]
Trestle or Trestles may refer to: Structures and structural elements: Trestle support, the structural element that supports a trestle bridge, trestle desk, trestle table, or similar structures; Trestle bridge, a bridge composed of trestle support elements Trestles Bridge, a railroad viaduct in California
Unlike other types of timber framing in Europe, the trestle frame construction uses no mortise and tenon joints. Archaeological excavations have uncovered similar wooden joints from more than 3,000 years ago, suggesting that this type of framing is an ancient unbroken tradition.
A bent in American English is a transverse rigid frame (or similar structures such as three-hinged arches).Historically, bents were a common way of making a timber frame; they are still often used for such, and are also seen in small steel-frame buildings, where the term portal frame is more commonly used.
Two king post trusses linked to support a roof. Key:1: ridge beam, 2: purlins, 3: common rafters. This is an example of a "double roof" with principal rafters and common rafters. A timber roof truss is a structural framework of timbers designed to bridge the space above a room and to provide support for a roof.
The term post is the namesake of other general names for timber framing such as post-and-beam, post-and-girt construction and more specific types of timber framing such as Post and lintel, post-frame, post in ground, and ridge-post construction. In roof construction such as king post, queen post, and crown post framing.