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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]
Most of the piers of modern bridges are made of reinforced concrete or prestressed concrete for larger structures. Two types of forms are mainly encountered: columns or walls. Each support can be composed of one or more walls or columns. The standard-shaped walls that can be found on most highways are represented in the illustration opposite.
Once several bridge piers are complete, support brackets are attached to adjacent piers and the main parallel girders of the MSS are lifted in place to support the scaffold and concrete forms. Jacks are used to raise the girders and forms and the concrete is poured for the segment (or span) after rebar is placed. After the concrete has cured ...
Rather, bents are simply cross-sectional templates of structural members, i.e., rafters, joists, posts, pilings, etc., that repeat on parallel planes along the length of the structure. The term bent is not restricted to any particular material. Bents may be formed of wooden piles, timber framing, [2] steel framing, or even concrete. [3]
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
In order to protect the 2012 bridge segment against corrosion, its rebar was protected by an epoxy coating and calcium nitrite was added as a corrosion inhibitor to its reinforced concrete. [12] The new concrete supports for the bridge structure are etched with letters spelling "Trestles", the nickname of the bridge. [1] [4]
A diagram showing an embankment Disbanded West Somerset Mineral Railway embankment near Gupworthy, UK Cream-colored concrete abutment marks a gap in an embankment and gives vertical support to the dark red trestle bridge, and to the fill of the bridge approach embankment. To reduce the metal cost of the bridge here it is further supported by ...