. Railroad structures and estimates . Totals 20% Type F 4, 66 0 street, 44 0 roadway. Quan-tity. 315,000 lb. 2,200 165 50 360 1,540 ,200 460 120 200 Cost, 10,240880 3,630400 3,600 1,540720 1,030 100 20 300 4,540 27,000 Type F 6, 60 0 street, 36 0 roadway. Quan-tity. 215,000 lb. 2,400 100 40 474 730 ,380 Cost, 6,990960 2,200320 4,740 730 830 855 65 20 300 3,590 21,600 Type F 6, 66 0 street, 44 0 roadway. Quan-tity. 315,000 ,20
. Railroad structures and estimates . Totals 20% Type F 4, 66 0 street, 44 0 roadway. Quan-tity. 315,000 lb. 2,200 165 50 360 1,540 ,200 460 120 200 Cost, 10,240880 3,630400 3,600 1,540720 1,030 100 20 300 4,540 27,000 Type F 6, 60 0 street, 36 0 roadway. Quan-tity. 215,000 lb. 2,400 100 40 474 730 ,380 Cost, 6,990960 2,200320 4,740 730 830 855 65 20 300 3,590 21,600 Type F 6, 66 0 street, 44 0 roadway. Quan-tity. 315,000 ,200 840 ,500 460 Cost, 10,240880 3,630400 5,170 840 9001,030 10020 3004,690 28,200 116 HIGHWAY BRIDGES. Concrete highway bridges for spans with intermediate supportsare shown below for two, four and six track crossings and theestimated cost of these structures are given in Table 59, page117. TYPE F, CONCRETE STRUCTURES SPANNING TWO, FOUR AND SIX TRACKS WITH THREE fi L, - ^ L, I 1 I I ELEVATION 2 TRACK SCHEMETYPES P2
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