s over this end, operating as a roadbed. The cuts also show how part of the deck 1895.) lock to prevent the bridge from being opened. There We recently illustrated the operations of construc- are also latches at the center of the bridge. tion of the Metropolitan West Side Elevated Railroad The… … THE VAN BTJREN STREET BRIDGE, CHICAGO-OPENING AND CLOSING MECHANISM. ing on a seprment of a circle, one of which is formed backward extension of the roadway just alluded to carried by the trusses, as they rock backward, de ballast is placed to bring the center of gravity into scends beneath the…
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