Hot Metal Bridge, Railway and road bridge in Pittsburgh, United States.
The Hot Metal Bridge is a dual-deck structure spanning the Monongahela River with two parallel structures built on shared piers. The upstream deck now carries motor vehicles, while the downstream deck serves pedestrians and cyclists.
The first span was built in 1887 for railroad service, followed by a second span in 1900 designed to transport molten steel between production facilities. The structure became integral to Pittsburgh's industrial expansion during the late 1800s and early 1900s.
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.
Both decks are easily accessible and offer separated pathways depending on how you travel. You can cross using the vehicle deck or the pedestrian and bicycle path depending on your needs.
The bridge was specifically engineered to transport ladles of molten steel, making it a remarkable feat of industrial engineering for its time. This specialized function made it a critical link in the local steel industry's operations.
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