Hot Metal Bridge, Railway and road bridge in Pittsburgh, United States.
The Hot Metal Bridge spans 1,174 feet across the Monongahela River with two parallel structures built on a single set of piers.
The first span, constructed in 1887, served railroad traffic while the second span from 1900 transported molten iron between Jones & Laughlin Steel Company facilities.
The bridge transported 4,300 tons of molten iron daily from blast furnaces to Bessemer converters, representing 15 percent of US steel production during World War II.
The upstream span now carries vehicles between Second Avenue and Hot Metal Street, while the downstream span serves pedestrians and cyclists on the Great Allegheny Passage.
Each ladle transfer car crossing the bridge carried up to 180 tons of molten iron per hour between the north and south banks of the Monongahela River.
Location: Pittsburgh
Official opening: 1887
GPS coordinates: 40.42830,-79.96080
Latest update: November 28, 2025 14:29
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