. Railroad structures and estimates . ngs eu. yd. Exeav. column footings cu. yd. Backfill column footings. eu. yd. Cone, abutments eu. yd. Exeav. abutments cu. yd. Backfill abutments eu. yd. Paving right of way 100 ft sq. yd. Sidewalk right of way 200 ft sq. ft. Waterproofing sq. ft. Falsework lin. ft. Eng. and contingencies 20% Total Each additional track costs. 60-ft. street. 140 55 68 150 60 420 325 160 400 2400 1725 160 $ 51,960 1,155 545 150 15 2,940 325 40 1,300 360 340 1,280 2,090 S12,500 $4,200 66-ft. street. 168 55 68 150 60 420 325 16
. Railroad structures and estimates . ngs eu. yd. Exeav. column footings cu. yd. Backfill column footings. eu. yd. Cone, abutments eu. yd. Exeav. abutments cu. yd. Backfill abutments eu. yd. Paving right of way 100 ft sq. yd. Sidewalk right of way 200 ft sq. ft. Waterproofing sq. ft. Falsework lin. ft. Eng. and contingencies 20% Total Each additional track costs. 60-ft. street. 140 55 68 150 60 420 325 160 400 2400 1725 160 $ 51,960 1,155 545 150 15 2,940 325 40 1,300 360 340 1,280 2,090 S12,500 $4,200 66-ft. street. 168 55 68 150 60 420 325 160 490 2200 1900 172 $ $2,350 1,155 545 150 15 2,940 325 40 1,590 330 380 1,360 2,200 $13,400$4,500 80-ft. street. 212 59 76 170 65 420 325 160 490 3600 2240 200 S2,980 1,240 610 170 15 2,940 325 40 1,590 540 450 1,600 2,500 .S15,000$5,300 ESTIMATES STEEL AND CONCRETE SUBWAYS. 79 TABLE 37. — ESTIMATES FOR STEEL SUBWAY BRIDGES (STEEL EYE BEAM AND CONCRETE FLOOR).. a b G 60 60 12 36 66 66 11 44 80 80 18 44 Type A One-span Subway (2 tracks, 13 ft. cts) Material, type A. 60-ft. street. 66-ft. street. 80-ft. street. Steel structure lb. Cone, floor cu. yd. Cone, abutments cu. yd. Excav. abutments. cu. yd. Backfill abutments cu. yd. Paving right of way. .sq. right of way. .sq. ft. Waterproofing sq. ft. Falsework lin. ft. Eng. and contings 20% 180,000 52 530 350 120 400 2,400 1,725 160 $ $5,400930 3,710 350 30 1,300360340 1,280 2,700 $16,400 207,000 57 530 340 120 490 2,200 1,900 172 $ $6,210 1,030 3,710 340 30 1,590 330 380 1,380 3,000 285,000 69 530 340 120 490 3,600 2,240 200 $ 00 $8,550 1,240 3,710 340 30 1,590 540 450 1,600 3,650 Total $18,000 $21,700 Each additional track $6,000 $6,700 $8,200
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