Alvord Lake Bridge, along with many of Ernest Ransome's reinforced concrete buildings, survived the 1906 San Francisco earthquake and several subsequent tremblers with no damage. Built in 1889 by Ernest L Ransome of New York, this reinforced concrete arch bridge in San Francisco's Golden Gate Park is believed to be the oldest concrete bridge in the United States that used steel reinforcing bars to improve the behavior of the concrete. The reinforcement consists of a series of square cold-twisted steel reinforcing bars, an invention of Ransome.
Society: ASCEMain Category: CivilSub Category: BridgesEra: 1880-1889DateCreated: 1889San FranciscoState: CACountry: USAWebsite: http://www.asce.org/project/alvord-lake-bridge/Creator: Ransome, Ernest
YearAdded:Image Credit: Public Domain (National Park Service)Era_date_from: 1889