. Railway maintenance engineering, with notes on construction . C. Chicago and North Western Railway, Chicago 130.—Passenger Terminals. STATION AND ROADWAY BUILDINGS 233 shed. For many years the train sheds for large railway ter-minals have consisted of long span roof trusses supporting highroofs, generally spanning all of the tracks. The height of these stations had its origin in an effort tolocate the steel work and skylights as far as possible from thedirect effect of the engine gases and smoke, and to improvethe ventilation in the shed. The heavy depreciation of thesesheds an
. Railway maintenance engineering, with notes on construction . C. Chicago and North Western Railway, Chicago 130.—Passenger Terminals. STATION AND ROADWAY BUILDINGS 233 shed. For many years the train sheds for large railway ter-minals have consisted of long span roof trusses supporting highroofs, generally spanning all of the tracks. The height of these stations had its origin in an effort tolocate the steel work and skylights as far as possible from thedirect effect of the engine gases and smoke, and to improvethe ventilation in the shed. The heavy depreciation of thesesheds and the poor ventilation obtained has led to the introduc-. FiG. 131.—Bush Train Shed. tion of the type illustrated in Fig. 131, which is used in nearlyall of the recent installations. The photograph is taken inthe Hoboken train-shed structure of the Lackawanna and showsan engine standing within the shed underneath the smoke duct. 85. Terminal Freight Stations.—The question of freightterminal stations is a very large one, and in order to form someconception of the problem the following description of the SooLine freight terminal in Chicago is given.* * The author is indebted to the Leonard Construction Co. for the detailspf this terminal. 234 RAILWAY MAINTENANCE Referring to Fig. 132, the terminal is located near the centerof the business and manufacturing district of the city and coverseleven city blocks. The City of Chicago would not permit the building of aterminal of this size at street level, or with any grade problem resolved itself, therefore, into two alternate pos-sibilities; retaining walls could be built along the
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