Design
The 25 de Abril Bridge is based on the San Francisco – Oakland Bay Bridge near the Golden Gate Bridge in San Francisco, USA. Both SFOBB and the 25 de Abril Bridge were built by the same company. The American Society of Civil Engineers says that "Like its sister bridge, the SFOBB in San Francisco, the Tagus River Bridge is located in an area with a long history of earthquakes" and seismic data had to be taken into account in its construction. Another sister bridge is the Forth Road Bridge in Edinburgh.
Upon completion the bridge had the longest suspended span and the longest main span in Continental Europe, the world's longest continuous truss, and the world's deepest bridge foundation. It was the fifth largest suspension bridge in the world, the largest outside the USA. Today it is the 20th largest suspension bridge in the world.
Read more about this topic: 25 De Abril Bridge
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—Henry David Thoreau (1817–1862)
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