Concrete bridges and culverts, for both railroads and highways (1909)
Tyrrell, H. G. (Henry Grattan), b. 1867 · Chicago The M.C. Clarke publishing co. [etc.] · leaf 237
and reinforced with railsspaced 18 inches apart for a 6-foot span, 10 inchesapart for an 8-foot span, and 6 inclies apart for a10-foot span. Xo. 4: are reinforced concrete arclies. similar tol!:ose in use on the ahove named railroads. Xo. 5 are concrete arches without reinforcement. Xo. G are… … 2:—PortalsConcrete72yds. @$8.00 = $576Steel 34.50 lbs. @ .01 = J3S tm Barrel per lin. ft. Concrete 468 yds. (« ^8.00=^374 Steel 450 lbs. % .04= l>-0 $554 Length for 20 ft. bank = 32. .\rea = 180 sq. ft. Cost 12490. Fig. 48. CONCRETE CUUERTS AND TRESTLES. 219 and cost inoportionatcly less. They…
Bridges, Concrete · Culverts
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