. Railroad structures and estimates . ARRANGEMENT OF TIESWhen depth uf cover U leu than 1 8. Fig. 40. C. P. R. Triangular Concrete Pipe. 142 CAST-IRON CULVERTS. TABLE Cost of Installing Three Types of Culverts. 4J Top op C. to B. of R. Items. Supporting track Excavation and backfillCulvert material Handling, lajdng, storecharges and hardware End walls Rip-rap and paving Contingencies Total cost 24 tri. con. pipe. 45 cu. lin. ft. 3 cu. yds. SI. 24-in. cast-iron pipe. 1 SI T. S5540171 38 29 40 cu. lin. ft. S330 2 ft. X 2 ft. wood box. 60 cu.
. Railroad structures and estimates . ARRANGEMENT OF TIESWhen depth uf cover U leu than 1 8. Fig. 40. C. P. R. Triangular Concrete Pipe. 142 CAST-IRON CULVERTS. TABLE Cost of Installing Three Types of Culverts. 4J Top op C. to B. of R. Items. Supporting track Excavation and backfillCulvert material Handling, lajdng, storecharges and hardware End walls Rip-rap and paving Contingencies Total cost 24 tri. con. pipe. 45 cu. lin. ft. 3 cu. yds. SI. 24-in. cast-iron pipe. 1 SI T. S5540171 38 29 40 cu. lin. ft. S330 2 ft. X 2 ft. wood box. 60 cu. F. B. M.(S25 M.) 60IOO 25 8280 Comparative Cost of Installing Three Ttpes of Culverts. 20 Top of C. to B. of R. Items. Supporting track Excavation and backfillCulvert material Handling, laying, storecharges and hardware End walls Rip-rap and paving Contingencies Total cost 30 in. con. pipe. 225 cu. lin. ft. 5 cu. yds. $ 45 S150225116 30-in. cast-iron pipe. 220 cu. lin. ft. SI. T. S150220513 92 $1050 2 ft. X 4 ft. wood box. 250 cu. yds. 11,000 F. B. M (S25
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