Model of the San Francisco Bay Bridge, SF-YB Island (east approach) section. YB Island-Oakland (west approach) section hopefully coming soon.
The San Francisco – Oakland Bay Bridge, (legally the The James 'Sunny Jim' Rolph Bridge, known locally as the Bay Bridge) is a multi-structure toll bridge complex that spans San Francisco Bay and links the California cities of Oakland and San Francisco in the United States.
The bridge consists of two major bridges connecting each shore with Yerba Buena Island, a natural outcropping located mid-bay. The western crossing, from San Francisco to the island, consists of two suspension bridges end-to-end with an anchorage, plus three shorter truss spans connecting the San Francisco landing to the western cable anchorage located on Rincon Hill. The eastern span between Yerba Buena Island and Oakland consists of a double-tower cantilever span, five medium-span truss bridges, and a 14-section truss causeway. These east bay structures are scheduled to be replaced by an entirely new crossing now under construction. On Yerba Buena Island itself, the crossing consists of a short concrete viaduct at the west span's cable anchorage, a tunnel through the island's rocky central hill, another short concrete viaduct, and a longer curved high-level steel truss viaduct which leads to the eastern span.
Charles H. Purcell
construction 1933-1936 #bay #bridge #buena #charles #earthquake #francisco #gate #golden #graduate #island #james #jim #loma #oakland #prieta #purcell #rolph #san #sunny #suspension #yerba