The Golden Gate bridge in San Francisco spans the Golden Gate Strait, part of the San Fransisco Bay. It is a suspension bridge made of steel. The construction began in 1933 and ended in 1939. The building of the bridge was said to be impossible, but Joseph B. Strauss led a great team of engineers to make it possible. The bridge, along with others, needs to be painted again as soons as it is just done being painted the previous time; the process never stops. It withstands great wind and tide and sits 8 miles from the epicenter of history's worst earthquake.