. The science of railways . ing laid, the second car is beingloaded. The empty car is thrown off the trackand stood on its side to permit the loaded one topass. The ties for the iron car are loaded on thecar containing the rails in such a manner that therails can be i^ulled from under them; the ties tobe placed under the rails after the constructiontrain passes over are unloaded as the train pro-ceeds. Behind the construction train there is agang placing the ties omitted at the front. Thisgang also finishes the spiking. In the construction of track, machines for thepurpose are used called Trac
. The science of railways . ing laid, the second car is beingloaded. The empty car is thrown off the trackand stood on its side to permit the loaded one topass. The ties for the iron car are loaded on thecar containing the rails in such a manner that therails can be i^ulled from under them; the ties tobe placed under the rails after the constructiontrain passes over are unloaded as the train pro-ceeds. Behind the construction train there is agang placing the ties omitted at the front. Thisgang also finishes the spiking. In the construction of track, machines for thepurpose are used called Track Laying Ma- 138 BUILDIXG ^iSD EEPAIRIXG RAILWAYS. chines. The Holman and the Harris machinesare the princii:)al ones. The Holman machine(see Fig. 76) is composed of a series of tramways30 feet long and about 20 inches wide, fitted withheavy iron rollers. These tramways are attachedto the sides of ordinary flat cars, without anychanges, and are supported by adjustable ironstakes that fit into the pockets on the sides of the. Fig. 76. HOLMANS TRACK LAYIXG MACHINE. cars, and, being connected, operate the full lengthof the train, the same as one continuous tram-way. The ties and rails are thro^Ti upon thesetramways and rolled down to the front, wheremen receive and place them in position on theroadbed. The ties come dowTi on the right handside of the train and the rails on the oppositeside. On the tie side, a chute, supported by awire cable, runs out thirty-five feet in front ofthe train, which allows the men handling tiesto be one panel ahead of the men handling rails CONSTRUCTION, 139 and consequently out of each others way. Atrain of ten cars, viz: six of ties, three of railsand the tool car will carry all material requiredfor a half-days work, and from one-half to three-fourths of a mile of track. One and one-half milesof track per day can be laid with this machine, withfrom forty to fifty men and a capable foreman,provided the Railroad Company can deliver thematerial at the f
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectrailroa, bookyear1900
