A retractile drawbridge is a rare type of moveable bridge in which the span is pulled away diagonally on rails. It is a variant of the retractable bridge. Only four examples are known to exist in the United States.[1] It is believed to have been invented by T. Willis Pratt in the 1860s.
See also
edit- Carroll Street Bridge, the country's oldest surviving retractile bridge,[2] located in Gowanus, Brooklyn
- Summer Street Bridge, an example of this type of bridge, located in Boston, Massachusetts, U.S.
References
edit- ^ Record, Historic American Engineering. "Summer Street Retractile Bridge, Spanning Fort Point Channel at Summer Street, Boston, Suffolk County, MA". www.loc.gov. Retrieved 2019-03-26.
- ^ "Transit Walk: Gowanus and Carroll Gardens". www.nytransitmuseum.org. Retrieved 2025-07-03.
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