. The street railway review . general man-ager of the Intramural Railway at the Worlds Fair, hesecured possession of facts and figures which were con-vincing as to the economy of electricity as a motivepower. His consultations with the Metropolitan manage-ment resulted in the announcement, about a year ago, that The minimum height of the structure above the street is14 feet, the usual height being 15 feet. The track is 4feet 9 inches above the bottom of the supporting supporting pillars are 14^2 to iSj-:^ feet high. Thestandard foundation is 7 feet deep and S feet girder
. The street railway review . general man-ager of the Intramural Railway at the Worlds Fair, hesecured possession of facts and figures which were con-vincing as to the economy of electricity as a motivepower. His consultations with the Metropolitan manage-ment resulted in the announcement, about a year ago, that The minimum height of the structure above the street is14 feet, the usual height being 15 feet. The track is 4feet 9 inches above the bottom of the supporting supporting pillars are 14^2 to iSj-:^ feet high. Thestandard foundation is 7 feet deep and S feet girders are 4 feet deep. Distance between pillarsis 39 to 50 feet. The lateral bracing is equivalent to 450pounds per lineal foot of track. At boulevard crossingsa special ornamental form of structure is employed. Therail is 90-pound T, furnished by the Illinois Steel Com-pany, with 4-bolt fish plates. VIADUCTS AND BRIDGES. The most notable of the structures built by this com-pany is the rolling lift or jack knife bridge across the. ON THE STRUCTURE.—THIRD RAIL AND AT SWITCHES. the road would use electricity. Since then the electricalconstruction work has been pushed rapidly and the roadhas been the center of an immense amount of contract for all the electrical apparatus was let inJune, 1894, to the General Electric Company. Considering the many entirely new problems whichhad to be faced, the progress made has been somethingremarkable. The road was first opened for passengertravel May 6. Mr. Baker, who has had charge of the elec-trical construction work from the beginning, has organ-ized and superintended the electrical work on the roadwith the most marked executive ability. STRUCTURE. The structure is the heaviest elevated road structureyet built in this country. It was designed to carry safelyin service 30-ton locomotives followed by double deck cars. Chicago river. The bridge spans 174 feet from pier topier. It is really two distinct bridges, each b
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Keywords: ., book, bookcentury1800, bookdecade1890, booksubjectstreetrailroads
