. The elements of railroad engineering . dchutes from the ground to the floor of the car, inclined about i in4, may be single for large stock or double for small stock, handledin double deck cars. Passenger cars should not be stored in freight yards, but ontracks of their own near the passenger station. Switches should be arranged in sets and as compactly as pos-sible to provide for handling them from a tower by interlockingdevices, if desired. They are sometimes, and about as economi-cally, worked by hand. The switch-light stand should be near the ground, each stand being turned by the moving
. The elements of railroad engineering . dchutes from the ground to the floor of the car, inclined about i in4, may be single for large stock or double for small stock, handledin double deck cars. Passenger cars should not be stored in freight yards, but ontracks of their own near the passenger station. Switches should be arranged in sets and as compactly as pos-sible to provide for handling them from a tower by interlockingdevices, if desired. They are sometimes, and about as economi-cally, worked by hand. The switch-light stand should be near the ground, each stand being turned by the moving rails of the switch, and furnished with two lights, showing switch set for siding or lead tracks. The track at the end of a set of parallel tracks, and from which these tracks depart, is called the lead track or ladder track. Such a lead track is sometimes laid through the middle of a set of parallel * See p. 93 for the recommended practice of the American RailwayEngineering and Maintenance of Way Association. I02 SIDE TRACKS AND YARDS. YARD DESIGN IO3 tracks and connected with them by shp switches, but such con-struction should be avoided so far as possible. Where there are many classification tracks, the entering endshould be wedge-shaped to concentrate the switches, and to savewear of frogs and switches, and to shorten the leads. Not morethan eight or ten body tracks should lead off from one lead orladder track. Some of the advantages of the small number ofbody tracks for each lead track are shown in Fig. 57.* Automatic scales should be provided on the track connectingreceiving and classification tracks. On these scales cars areweighed as they pass over. Dead tracks should be provided closeto the scale track for passing cars not to be weighed, that thescales need be used no more than necessary. The dead tracksmay be supported on posts set in the scale pit. At important stations where much bulky and heavy freightis to be handled between cars and wagons or trucks, one or more
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
