. The science of railways . Fig. 37. REAR VIEW OP GRADER DITCHER AND WAGON LOADER. Heavy fills are generally made wholly frommaterial excavated close by, but where the loca-tion has been made with the view of avoiding cutsas much as possible, the heavy fills will hav^e tobe made with material from borro^N-pits. In thiscase the bottom is put in with material borrowedon each side of the road and at the point ofheavy fill; the top is made with material bor-rowed at the end near grade and hauled out on thetop of the embankment and is built up in lifts oftwo or three feet at a time; the top materia
. The science of railways . Fig. 37. REAR VIEW OP GRADER DITCHER AND WAGON LOADER. Heavy fills are generally made wholly frommaterial excavated close by, but where the loca-tion has been made with the view of avoiding cutsas much as possible, the heavy fills will hav^e tobe made with material from borro^N-pits. In thiscase the bottom is put in with material borrowedon each side of the road and at the point ofheavy fill; the top is made with material bor-rowed at the end near grade and hauled out on thetop of the embankment and is built up in lifts oftwo or three feet at a time; the top materialfor the embankment is taken from the cut at theend, which is widened or used as a borrowpit onthe side from which snow will come. Where thelength of haul is considerable, four-wheeledscrapers, wagons and carts are used (see Figs. 39to 44.) CONSTRUCTION, 101. Fig. 39. FOUR-WHEELED SCRAPER IN POSITION FOR LOADING FRONT PAN.
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectrailroa, bookyear1900
