In 1899, engineers from the City of Chicago's Division of Bridges and Viaducts performed a survey of moveable bridge design in the U.S. and Europe. Their study led to the conclusion that the unusual trunnion bascule design would best meet their needs.
Trunnion
YearAdded:
Image Credit:
Courtesy Flickr/Matthew Black (CC BY-SA 2.0)
Image Caption:
Cortland Street Drawbridge
Era_date_from:
1902
1981
Innovations
In 1899, engineers from the City of Chicago's Division of Bridges and Viaducts performed a survey of moveable bridge design in the U.S. and Europe. Their study led to the conclusion that the unusual trunnion bascule design would best meet their needs.
The Cortland Street…
