Journal of the Association of Engineering Societies (1881)
Association of Engineering Societies (U.S.) · New York, [etc.] Board of Managers · leaf 294
ASSOCIATION ' OF ENGINEERING SOCIETIES. 2S6 their risers are made of metal gratings, admitting light and ventilation through the ceiling of the railroad subway. In the center of this subway are arranged the steel columns which sup- port the ceiling and which are carried up to the high-level… … fTo. 4- Pu/^rsi or Low LevE-L S-rR,EE-rs I 1^1 I I'l h'lTi'iT I I'l I Trusses supporting sidewalks. Columns supporting high-level roadway. 30. 20. Trusses supporting upper roadway. Colunans supporting high-level sidewalk. 31. 21. Rapid transit elevated tracks. Local car tracks. 32. 23. Curbs to…
Engineering
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