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
Girder bridge
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A girder bridge is a bridge that uses girders as the means of supporting its deck. The two most common types of modern steel girder bridges are plate and box.
Two different girder bridges. The top is a plate girder bridge, while the bottom is a concrete girder bridge.
A concrete girder bridge pier during construction prior to installation of the bridge deck and parapets, consisting of multiple angled pylons for support (bottom), a horizontal concrete cap (center), and girders (top) with temporary wood bracing
The stubs at the eastern end of the Dunn Memorial Bridge give a good cross section of girder bridge construction
Brooklyn Bridge September 2021 002