. Railroad structures and estimates . HALF ELEVATION. 6 TRACK SCHEME HALF ELEVATION, 4 TRACK SCHEME TYPES F6 TYPES F4. CROSS-SECTION, 66*0Street, 4+oroaoway TYPES F6 COST OF HIGHWAY BRIDGES. 115 TABLE 58. —TYPES F 2, 4 AND 6, STEEL STRUCTURES SPANNING TWO, FOURAND SIX TRACKS WITH THREE SPANS. Estimates, Types F 2, 4 and 6. Material. Structural steel Cone, sidewalk on br Cone, slab .- Cone. eol. footings Reinf. cone, abut Plain cone, abut Exc. for abut, and col. footings. Backfill Paving on br Paving on R. of W. but off on R. of W. but off br, Handrail Eng. and cont Totals Unitcost.
. Railroad structures and estimates . HALF ELEVATION. 6 TRACK SCHEME HALF ELEVATION, 4 TRACK SCHEME TYPES F6 TYPES F4. CROSS-SECTION, 66*0Street, 4+oroaoway TYPES F6 COST OF HIGHWAY BRIDGES. 115 TABLE 58. —TYPES F 2, 4 AND 6, STEEL STRUCTURES SPANNING TWO, FOURAND SIX TRACKS WITH THREE SPANS. Estimates, Types F 2, 4 and 6. Material. Structural steel Cone, sidewalk on br Cone, slab .- Cone. eol. footings Reinf. cone, abut Plain cone, abut Exc. for abut, and col. footings. Backfill Paving on br Paving on R. of W. but off on R. of W. but off br, Handrail Eng. and cont Totals Unitcost. 20% Type F 2, 60 0 street, 36 0 roadway. Quan-tity. Cost, 215,000 ,400 210 ,100 6,990960 2,200320 1,470 1,100 300 855 65 20 300 2,920 17,500 Type F 2, 66 0 street, 44 0 roadway. Quan-tity. 315,000 ,200 230 1,240 Cost, 10,240 880 3,630 400 1,6101,240 3301,030 10020 3003,920 23,700 Type F 4, 60 0 street, 36 0 roadway
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