Beam bridge
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Beam bridges are the simplest structural forms for bridge spans supported by an abutment or pier at each end. No moments are transferred throughout the support, hence their structural type is known as
Multispan plate girder bridge deck on concrete piers.
Drvenija bridge, Sarajevo
Trestle bridge
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A trestle bridge is a bridge composed of a number of short spans supported by closely spaced frames usually carrying a railroad line. A trestle is a rigid frame used as a support, historically a tripo
Trestles are useful as approaches to bridges over marshes and shallows.
Trestle of wooden posts, beams, and diagonal braces
Kinzua viaduct over the Kinzua Creek valley in Pennsylvania
Interurban train trestle, completed after the 1915 Galveston Hurricane