The encyclopdia britannica; a dictionary of arts, sciences, literature and general information . t issecured to an anchorSge. The girder spans are 525 ft., the cantileverspans 547 ft., and the shore spans 201 ft. , (6) The Quebec bridge (fig. 25) over the St Lawrence, whichcollapsed while in course pf; in 1907. This bridge,connecting very important railway systems, -was designed to carrytwo lin^s of rails, a highway and electric railway on each side, -allbetween the niain trusses. Length between abutments 3240: ft.; 542 BRIDGES channel span 1800 ft.; suspended span 675 ft.; sho
The encyclopdia britannica; a dictionary of arts, sciences, literature and general information . t issecured to an anchorSge. The girder spans are 525 ft., the cantileverspans 547 ft., and the shore spans 201 ft. , (6) The Quebec bridge (fig. 25) over the St Lawrence, whichcollapsed while in course pf; in 1907. This bridge,connecting very important railway systems, -was designed to carrytwo lin^s of rails, a highway and electric railway on each side, -allbetween the niain trusses. Length between abutments 3240: ft.; 542 BRIDGES channel span 1800 ft.; suspended span 675 ft.; shore spans 562I weight of metal about 32,000 tons. (7) The Jubilee bridge over the Hugli, designed by Sir BradfordLeslie, is a cantilever bridge of anothertype (fig. 26). The girdersare of the Whipple Murphy type, but with curved top booms. The bridges. Sucli a bridge was the Wearmouth bridge, dpsigneflby Rowland Burdon and erected in 1793^1796, with a span of23s ft., Soutbwark bridge over the Thames, designed by JohnRennie with cast iron rib&and erected in 1814-1819, has a centre. —^^xfjs^M^,i,////,i^^y-- ?? ? ^p bridge carries a double line of railway, between the main central double cantilever is 360 ft. long. The two side spangirders are; 420 ft. long. The cantilesver rests, on two river piers120 ft. apart, centre to centre. The side girders rest on the cantileverson i5-ini pins, in pendulum links ,suspended from similar pins insaddles 9 ft. high. if) Metal Arch Bridges.—The first iron bridge erected was constructed by John Wilkinson (1728-1808) and Abraham Darby ROCK ,.-- ( Fig. 24.—Lansdowne Bridge. j span of 240 ft. and a rise of 24 ft. In Paris the Austerlitz (iSoo-1806) and Carrousel (i834-i836) bridges had cast iron 1858 an aqixeduct bridge was erected at Washington by M. (1816-1892). This had two arched ribs formed bythecast irbn pipes through which the water passed. The pipes were4 ft. in diameter inside, 15 in. thick, and
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectencyclo, bookyear1910
