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Bosphorus Bridge

Project Completed: 1973

About the project

The Bosphorus Bridge is one of two bridges in Istanbul, Turkey, spanning the Bosphorus strait and thus connecting Europe and Asia. It is a gravity anchored suspension bridge with steel pylons and inclined hangers, with the deck units comprised of a hollow box aerofoil section, hanging on zigzag steel cables.

The structure was designed by renowned British civil engineers, Sir Gilbert Roberts and William Brown with construction undertaken by the Turkish firm Enka Construction & Industry Co along with co-contractors Cleveland Bridge & Engineering Co. Ltd and Hochtief AG (German).

Spanning 1,074m, with an overall length of 1,560m, the bridge contains six carriageways and at its time of construction in 1973, it was the 4th longest suspension bridge span in the world; the longest outside the USA.

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