Structural Engineering Slide Library

Bridge trusses: Cantilever

	Image-GoddenD23 Michigan Avenue bascule bridge. Slides GoddenD23-D26 are all bascule bridges over the Chicago River. Cantilevered from both ends, the bridges can be opened for tall river traffic. In the double-deck bridges of GoddenD23 and GoddenD24, the top chord takes compression at mid-span on closure. (Chicago, Illinois)
	Image-GoddenD24 Wells Street bascule bridge. A two-level bridge: the top level for railway, and the lower level for highway. The mid-span of this bridge can be seen by the split vertical towards the center of the slide. (Chicago, Illinois)
	Image-GoddenD25 Dearborn Street bascule bridge. A variable depth bascule bridge carrying road traffic. Profile of the truss conforms to the moment diagram produced by UD loading on a cantilever. (Chicago, Illinois)
	Image-GoddenD26 Dearborn Street bascule bridge. Underside of bridge structure. Note the cantilevered walkways, the transverse bracing between the bottom chords, and the riveted construction of the main cantilever trusses. (Chicago, Illinois)
	Image-GoddenD27 Tower Bridge, London. The center span of the bridge consists of a bascule bridge that opens for major river traffic. The cantilevers consist of linear taper trusses. (London, England)

Set D: Truss Structures