. Railroad structures and estimates . .. Exc. for abut Backfill 300,000 lb. 1,800 14 240 9,750 7202,0005,400620450300810 45 354,070 240,000 lb. 1,800 14 240 7,800 7202,2005, 45 ;0 410,000 lb. 1,584 59 528 13,:;- ,800680500300970 191 794,990 l,. 59 628
. Railroad structures and estimates . .. Exc. for abut Backfill 300,000 lb. 1,800 14 240 9,750 7202,0005,400620450300810 45 354,070 240,000 lb. 1,800 14 240 7,800 7202,2005, 45 ;0 410,000 lb. 1,584 59 528 13,:;- ,800680500300970 191 794,990 l,. 59 628 630 2,480 680 .500 Handrail 300 Paving on br Paving on but off bridge -:dewalkon but off br Eng. and cont 900 191 Totals 24,200 22,000 29,800 26,500 114 HIGHWAY BRIDGES. Steel highway bridges with three spans with intermediatesupports between tracks are illustrated below, over two, fourand six railway tracks, for varying conditions, and the costs ofthe various structures are given in Table 58, page HALF ELEVATION, 6 TRACK SCHEME HALF ELEVATION, 4 TRACK SCHEME TYPES F6 TYPES F4
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