. The Street railway journal . FIG. 10.—CONCRETE BED ON GRAVEL, AND TRACKS LAIDUPON THIS, IN THE DISTANCE erly drained, will not hold up, no matter how well built. Inthe construction shown in the drawing a 4-in. drain tile is runalong the center of the track a few inches below the lowerbed of gravel. At the summits and valleys this tile is runinto circular catch basins built of brick in the center of thetrack and provided with cast-iron manholes and covers. Thebasins, which are drained into city sewers through 8-in. sewerpipe, are large enough to permit a man to enter them in orderto flush out
. The Street railway journal . FIG. 10.—CONCRETE BED ON GRAVEL, AND TRACKS LAIDUPON THIS, IN THE DISTANCE erly drained, will not hold up, no matter how well built. Inthe construction shown in the drawing a 4-in. drain tile is runalong the center of the track a few inches below the lowerbed of gravel. At the summits and valleys this tile is runinto circular catch basins built of brick in the center of thetrack and provided with cast-iron manholes and covers. Thebasins, which are drained into city sewers through 8-in. sewerpipe, are large enough to permit a man to enter them in orderto flush out the connecting drains should they become 9 is a drawing of a cross-section of these catch drawing is reproduced only for the purpose of showing. FIG. 12.—CONCRETE MIXER, SHOWING SLOPING TRACK TOTHE PLATFORM ABOVE THE DRUM the construction of the basins, as the track construction illus-trated is not at present being followed by the company. The methods employed in the reconstruction of city trackinterfere very little with the schedule of the cars. The trackis constructed in sections about 1500 ft. long. The old trackis not disturbed until a temporary track is laid alongside thedouble track. This temporary track is made up of sectionsof two T-rails bolted permanently together by means of Y^ on either side of 2l/2-in. x 6-in. timbers, which are placedat about 7-ft intervals. The sections are originally made upin the yards. When they are to be used they are hauled to the scene of the work on construction cars and are unloadedand placed in position by means of the derrick car to whichreference has already been made. But a very short time is
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
