Golden Gate Bridge (San Francisco, 1937)
The suspension bridge that stretches above the strait between San Francisco Bay and the Pacific Ocean was opened in 1937.
Golden Gate, San Francisco, bridge, suspension bridge, bridge deck, pillar, anchor block, tower, California, main cable, suspension cable, cable, steel, development
- 227 m (746 ft)
- 1,280 m (4,200 ft)
- 2,737 m (8,981 ft)
The Golden Gate bridge is located in San Francisco, California. It is the second longest suspension bridge in the U.S.
The construction of the bridge that stretches above the strait between San Francisco Bay and the Pacific Ocean was started in 1933, as one of President Roosevelt's New Deal projects. Designed by a team led by architect Joseph Strauss, the bridge was an architectural masterpiece. It is 2,727 m (8,981 ft) long, nearly 28 m (91.86 ft) wide, and 227 m (746 ft) tall from sea level to the top of the pillars.
The body of the bridge is suspended on two gigantic steel pillars, at a distance of 1,280 m (4,200 ft). The cables stretching between the pillars measure 91 cm (35.83 in) in diameter and consist of 27,572 separate wires.
The bridge carries six lanes of traffic and two pedestrian walkways. Having opened in 1937, the project was ultimately profitable, as the 71 million dollar construction costs were paid off by 1971.
The bridge was built on a geologically active area, but it has proved safe, having resisted a 7.1 magnitude earthquake in 1989. Since its completion, it has only been closed due to weather conditions three times, because of strong winds.
The bridge has become one of the symbols of San Francisco. The American Institute of Architects compiled a list of the most popular structures in the U.S. in 1999 and the Golden Gate Bridge was 5th on this list.
Types of bridges include beam-, arch-, suspension-, cantilever and truss bridges.
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