definition
strict definition
beam bridge
Related terms: trabeated bridge
A bridge with a rigid spanning member resting on supports at both ends of each span.
A beam bridge is the simplest of all bridge types, requiring no support other than a rigid member resting on both ends of the spanned length. Beam bridges are generally limited in their size, and are not practical for extremely long spans. Short spans can be crossed with wood beams, and steel can be used for medium spans.
The spanning member carries loads between its end supports. Its basic arrangement does not depend on suspended cables or an arch beneath the deck.
A sequence of supported beams can create more than one span. Each beam still rests at both ends, unlike a cantilever that projects from an anchoring support.
beam bridge Photos
Related definitions
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arch bridge
A bridge whose deck is supported from below by one or more arches carrying loads toward their end supports. -
cable-stayed bridge
A bridge whose deck is supported by tense cables mounted on columns or in the surrounding landscape. -
cantilever bridge
A bridge whose spans project from anchoring piers instead of simply resting on supports at both ends. -
float bridge
A bridge whose span floats on water and is simply anchored to stabilization points. -
movable bridge
A bridge of any form which is capable of controlled movement in order to lift or remove its span. -
suspension bridge
A bridge whose span hangs from main cables anchored at its ends, commonly supported above the span by towers. -
trestle
A bridge or viaduct whose deck is carried by a continuous rigid support framework, often over many small spans. -
truss bridge
A bridge whose span is carried by a connected truss framework with members acting in tension and compression.