Cantilever Bridge

Bridge having two anchorages and two towers, the portion between the towers consisting of two cantilever arms which support a central span. Thus loads placed upon either cantilever arm have no effect upon the central span. The first was that built 1883 over the Niagara river, one mile below the falls; it is 910 ft. long. The longest is the Forth bridge in Scotland, with two spans of 1,700 ft. each. The longest in the U. S. is that over the Mi i ippi at Memphis, having a channel span of 7904 ft. and a total length of IMG:content-0722.png:[graphic]