Revision of the Niagara Railway Arch Bridge . evation, and so far astests indicated would be satisfactory for the short spans betweenstringers and new jack stringers. It was discarded mainly on accountof the certainty that it would shatter under traffic. The idea, withcertain evident modifications, is worthy of a trial on some new design, which was finally approved from an engineering stand-point, was a |-in. flat steel plate protection with proper protectivecoating. Furthermore, this made it possible to carry the water awayby side downspouts, but when the cost was considered, and t
Revision of the Niagara Railway Arch Bridge . evation, and so far astests indicated would be satisfactory for the short spans betweenstringers and new jack stringers. It was discarded mainly on accountof the certainty that it would shatter under traffic. The idea, withcertain evident modifications, is worthy of a trial on some new design, which was finally approved from an engineering stand-point, was a |-in. flat steel plate protection with proper protectivecoating. Furthermore, this made it possible to carry the water awayby side downspouts, but when the cost was considered, and the costof maintenance as well, some lighter plate floor was found desirable. KEVISION OF NIAGARA RAILWAY ARCH BRIDGE 1983 The suggestion of the use of Hn. special iron was at once rejected,and a plan for ^-in. special iron floor was prepared for bids. Thelabor and shop conditions were finally responsible for the use of thisT3g-hi. floor, shown in detail in Fig. 21, which could be largely fabri- % Rod every 4th Tie M*-)/Short Ties Sheet Metal. TYPICAL SECTION*JL-^ 4, %Z Holes in each Flange—^ _ Sheet Metal 4»Hole for Down8pout 1 Rad/l 716 Hole in each End of Plate 3 9- -I LONGITUDINAL SECTION OF FLOOR PLATES NEW FLOOR OF NIAGARA RAILWAY ARCH BRIDGE, WITH DRIP PLATE AND GUTTER
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Keywords: ., bookcentury1900, bookdecade1920, bookidrevisionofni, bookyear1920
