"2063m" - 1 õppematerjal

Bridges presentation

These two were the prototypes for subsequent cantilevers at Poughkeepsie, New York, the Firth of Forth Bridge in Scotland, and the Québec Bridge in Canada. The Poughkeepsie Cantilever (1886) was the first rail crossing of the Hudson River below Albany, 55 miles (89km) north of New York City. Built by the Union Bridge Company of New York to designs by company engineers Francis O'Rourke and Pomeroy P Dickinson, the overall length is 6768ft (2063m), including two cantilevers of 548ft (167m) each. Strengthened in 1906 by adding a third line of trusses down the middle designed by Ralph Modjeski, citizens on both sides of the river are working to have this magnificent, but now abandoned, bridge incorporated as part of the Hudson Greenway trail system. Figure 20 Forth Bridge (1890): an historic photograph showing the FifeTower at North Queensferry, Scotland (UK), nearing completion. The illustration is from