Engineering Wonders of the World
Volume I

År: 1945

Serie: Engineering Wonders of the World

Sider: 448

UDK: 600 Eng -gl.

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Side af 476 Forrige Næste
SCHERZER ROLLING LIFT BRIDGES. 47 160-FOOT SPAN SCHERZER BRIDGE AT CLEVELAND, OHIO. VIEW DURING CONSTRUCTION. Notice rack and pinion gear for raising the bascule. cess does not block the channel at all, as the truss is erected in the upright position, and not lowered until complete and ready for use. Any desired number of contiguous railway tracks may be carried across a navigable canal or river by the rolling lift type of bridge, by constructing single or double track bridges and placing them side by side, to be coupled