Types of Bridges in Buffalo

Pedestrian bridge:  Bridge designed for pedestrians

Arch bridge:
Bridge with abutments at each end shaped as a curved arch. The weight of the bridge is thrust into the abutments at either side.  Fixed bridge.

Truss bridge:  Bridge whose load-bearing superstructure is composed of wooden or metal triangle trusses.   Uses king or queen posts.    Fixed bridge.
Bowstring truss bridge:  Bridge formed of an arched beam (the bow) joined at each end by a straight beam (the string), with diagonal support beams joining the two.

Bascule bridge
: A type of bridge with a pivoting section that is raised and lowered using counterweights.  Movable bridge.

Lift/Vertical lift bridge
: movable bridge in which a span rises vertically while remaining parallel with the deck.
Movable bridge.
Swing bridge:
Movable bridge that has as its primary structural support a vertical locating pin and support ring, usually at or near to its center of gravity, about which the turning span can then pivot horizontally. 
Movable bridge.

Page by Chuck LaChiusa in 2020
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