San Francisco Oakland Bay Bridge Construction-View Along The Cat Walk
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Series 104 Interesting Facts About Bridge - Bridges San Francisco Bay and connects with Oakland and East Bay. Work started 1933, date of completion 1937. Total length of bridge 4 1/4 miles. Longest span 2,310 feet. Highest tower 518 feet above water. Number of piers, 51. Steel used, 200,000 tons. Cables, 28 3/4 inches in diameter. Wires in each cable, 17,464. Total mileage of wire in cables, 78,800 miles. Concrete used, 1,000,000 cubit yards. Upper level provides six automobile lanes. Lower level three lanes for heavy traffic and two interurban lines. Total cost, about $75,000,000 |
