MODERN STEAM PRACTICE . 1054 The Douro Bridge , near Oporto . — This is the largest ex - ample of an arch rib bridge yet constructed . The central span is … 520 feet , and the height of rails to water surface is 201 feet . The weight of central opening is 727 tons , of which 504 are in the curved arch part alone . Fig . 734 shows one half of span of the great arch , and Fig . 735 plan of same . ACTION OF WIND ON BRIDGES AND CHIMNEYS . Considerable…
e-rara · Eisenbibliothek Schlatt · No known copyright restrictions. Free to use for anything.
