. Railway track and track work . only 12 ins. It is 10 ft. wide on top, 15 ft. at the bottom and 14 A berme or bench 2 ft. 6 ins. wide, with a fall of 1 in., extends fromthe toe of the ballast to the edge of the 20-ft. roadbed. Chicago & Eastern Illinois Ry. (Fig. 7).—The width of roadbed fordouble track is 29 ft. 8% ins. in cuts and 31 ft. $y2 ins. on banks. Forsingle track, the width is 16 ft. 8% ins. and 18 ft. %V2 ins., respectively,with a crown of 6 ins. for burnt clay ballast and 8 ins. for gravel. Thegravel is 12 ins. deep under the tie at the middle, and sloped in a uniformcu
. Railway track and track work . only 12 ins. It is 10 ft. wide on top, 15 ft. at the bottom and 14 A berme or bench 2 ft. 6 ins. wide, with a fall of 1 in., extends fromthe toe of the ballast to the edge of the 20-ft. roadbed. Chicago & Eastern Illinois Ry. (Fig. 7).—The width of roadbed fordouble track is 29 ft. 8% ins. in cuts and 31 ft. $y2 ins. on banks. Forsingle track, the width is 16 ft. 8% ins. and 18 ft. %V2 ins., respectively,with a crown of 6 ins. for burnt clay ballast and 8 ins. for gravel. Thegravel is 12 ins. deep under the tie at the middle, and sloped in a uniformcurve from the top of the toe at the center to the bottom at the ends, and awidth of 14 ft. 4 ins. at the toe. There are about 1,800 cu. yds. of ballastper mile of single track. The burnt clay is level with the top of the tiebetween the rails, and then slopes to the middle of the tie at the ends, andthence to a bottom width of 10 ft. 4 ins. at the toe. 8tfor8ft:Tie.^. Fig. -Southern Pacific Ry. Southern Pacific Ry. (Fig. 8).—The single track roadbed is 16 ft. wide, in-creased to 18 ft. in cuts where rainfall is heavy, and 15 ft. is allowed for ex- ROADBED CONSTRUCTION. 15 isting high banks. Stone ballast is shouldered out 6 ins. beyond the ties;it is 15 ins. deep (below top of tie) at the middle and 18 ins. at the toe, 4 ins. from the end of 8-ft. ties, beyond which the roadbed slopes 6 to 1 to theedge, of the cut. Gravel ballast is shouldered out 6 ins. level with bottom oftie and filled in 3 ins. deep over the center of the tie, the depth being 15ins. at the middle and 17 ins. at the toe. Earth is filled in 3 ins. over the 80-
Size: 3349px × 746px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubjectrailroa, bookyear1901
