. Railroad construction, theory and practice; a text-book for the use of students in colleges and technical schools, and a hand-book for the use of engineers in field and office . 404 EAILROAD CONSTRUCTION. quireleads other hand re-longerand morespace. No. 7and even No. 6frogs are some-times used onaccount of econ-omy of space,but they havethe disadvan-tages of greatertractive resist-ance, greaterwear and tear ontrack and rollingstock, and great-er danger of de-railment. The design ofan existing yardis best studiedby first pickingout the laddertracks and thethrough trackswhich lead fromo
. Railroad construction, theory and practice; a text-book for the use of students in colleges and technical schools, and a hand-book for the use of engineers in field and office . 404 EAILROAD CONSTRUCTION. quireleads other hand re-longerand morespace. No. 7and even No. 6frogs are some-times used onaccount of econ-omy of space,but they havethe disadvan-tages of greatertractive resist-ance, greaterwear and tear ontrack and rollingstock, and great-er danger of de-railment. The design ofan existing yardis best studiedby first pickingout the laddertracks and thethrough trackswhich lead fromone division ofthe yard to an-other. Theseare tracks whichmust always bekept open forthe passage oftrains, in contra-distinction to thetracks on whichcars may be leftstanding, eventhough it is onlyfor a few mo- §379. Yards ai^d Terminals. 405 ments, while drillingis being done. Sucha set of tracks, whichmay be called theskeleton of the yard,is shown by heavylines in Fig. line indicates apair of rails. Thetracks of the storageyards are shown bythe lighter lines. 379- Minor freightyards. Fig. 165 il-lustrates a freightyard on the NewYork harbor front towhich cars are broughton floats. Ten teamtrack
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Keywords: ., bookauthorwebbwalt, bookcentury1900, bookdecade1920, bookyear1922
