. The Street railway journal . te lined tunnel usedon about miles or 23 per cent of the road, of which percent was concrete lined open cut work, and the remainder wasrock tunnel work; (4) elevated road on steel viaduct used on tunnel, and on the Battery Park loop) the felt water-proofinghas been made more effective by one or two courses of hard-burned brick laid in hot asphalt, after the manner sometimesemployed in constructing the linings of reservoirs of water-works. The reinforced concrete construction substitutes for the steelroof beams, steel rods, approximating Ij4 ins. square, l
. The Street railway journal . te lined tunnel usedon about miles or 23 per cent of the road, of which percent was concrete lined open cut work, and the remainder wasrock tunnel work; (4) elevated road on steel viaduct used on tunnel, and on the Battery Park loop) the felt water-proofinghas been made more effective by one or two courses of hard-burned brick laid in hot asphalt, after the manner sometimesemployed in constructing the linings of reservoirs of water-works. The reinforced concrete construction substitutes for the steelroof beams, steel rods, approximating Ij4 ins. square, laid invarying distances according to the different roof loads, from6 ins. to 10 ins. apart. Rods ins. in diameter tie the sidewalls, passing through angle columns in the walls and thebulb-angle columns in the center. Layers of concrete are laidover the roof rods to a thickness of from 18 ins. to 30 ins., andcarried 2 ins. below the rods, thus imbedding them. For thesides similar square rods and concrete are used and angle col-. .J) Down. q „ _b_. a -B Toilet -Down Down-!-* EXPRESS PLATFORM
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
