The Sydney Harbour Bridge was built in 8 years.
The Sydney Harbour Bridge is a metal arch bridge (See eduMedia animation on different types of bridges).
The metal structure rests solely on 4 bearings. During construction, each half arch was held by a hundred steel cables. These cables were removed once the arch was completed in 1930.
Click on the pins of the timeline to open the pictures.
Click on the picture to zoom in.