Sutro Tower

The Sutro Tower is a 297.7 meter high transmission tower in San Francisco, California. The steel lattice tower located on the 254 meter high Mount Sutro. Both the tower as the mountain bearing the name of Adolph Sutro (1830-1898), a successful businessman and former mayor of San Francisco. The radio tower is the tallest building in the city, even surmounted so the famous skyscraper Transamerica Pyramid, and is also simultaneously the second- tallest freestanding structure in California after the U.S. Bank Tower.

History

As early as 1966 a society was formed from several broadcasters to demolish the mansion on Mount Sutro in order to make room for a newly constructed transmission tower. Despite the altitude and proximity to San Francisco International Airport, the competent authority gave the green light for the building.

The not accessible to the public broadcasting tower, was built 1971-1972; began broadcasting took the tower on July 4, 1973.

Description

Building

The distinctive steel structure consists of three supporting pillars, which are connected to each other on five levels by cross struts and supported. The radio tower is founded on a 3,750 -cubic-meter and 1,700 -ton concrete foundation. He was designed so that the center of gravity of the tower under the ground is to ensure therefore a better stability in the event of an earthquake. According to calculations, it would have the San Francisco earthquake of 1906 survived without damage.

Tuning

On the top and the intermediate floors diverse antennas for broadcasting four radio and eleven television programs are attached. In addition, the tower serves other communications media as a transmitter.