. Railroad structures and estimates . ^smSS^m^^^^^ Plate 6x 8, ?^^^^RoLl-4 Lon^^>^ SECTION THROUGH PAVED BAGGAGE PLATFORM Fig. 189. P. R. R. Station Platforms. Screenings^/;! (379) 380 LOW PASSENGER PLATFORMS. Platforms are usually constructed 200 ft. long. TABLE OF CONCRETE PROPORTIONS. Class. Cement. Sand. Stone. B 1 part1 part 3 parts1| parts 6 parts0 Finish 1 Tliird Rail 1 Erotection ^8^^ Board. Fig. 190. Height and Distance from Rail for Low Passenger Platforms for Electrified Track. FREIGHT PLATFORMS. 381 Freight Platforms. — At points where the freight sh«d is atone end of the statio
. Railroad structures and estimates . ^smSS^m^^^^^ Plate 6x 8, ?^^^^RoLl-4 Lon^^>^ SECTION THROUGH PAVED BAGGAGE PLATFORM Fig. 189. P. R. R. Station Platforms. Screenings^/;! (379) 380 LOW PASSENGER PLATFORMS. Platforms are usually constructed 200 ft. long. TABLE OF CONCRETE PROPORTIONS. Class. Cement. Sand. Stone. B 1 part1 part 3 parts1| parts 6 parts0 Finish 1 Tliird Rail 1 Erotection ^8^^ Board. Fig. 190. Height and Distance from Rail for Low Passenger Platforms for Electrified Track. FREIGHT PLATFORMS. 381 Freight Platforms. — At points where the freight sh«d is atone end of the station building, either as an extension or a sepa-rate building on the main line, it is impossible to unload car-loadfreight or heavy machinery. On this account it is sometimesnecessary to erect unloading platforms on the siding deliverytrack, where machinery or car-load freight can be handled. The platforms vary in width from 8 to 24 ft. or more, andshould not be less than a car length, or about 30 ft., with aramp at one end. Fig. 191. Approximate cost. — The cost of such platforms varies from25 cents to 50 cents per square foot erected Freight Shed Teamways. Approximate cost. — Paving, including filling excavation andgutters per square yard, $ to $ Concrete curbing 1 by 1 ft. 6 in. deep, per lineal foot in place, 60 cents to $ vitrified tile drain p
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