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Turkey’s Izmit bridge opens

Izmit bay bridge

The world’s fourth longest suspension bridge has opened in Turkey.

The Izmit Bay Bridge – now called the Osman Gazi Bridge – is almost 3km long has a free span of 1,550m between its pylons. The pylons are made of steel and have a height of 250m. The overall construction required around 85,000 tonnes of steel and about 125,000 m3 of concrete.

The bridge was designed by Japanese contractor IHI and Cowi. It will cut the existing 70-minute drive around Izmit Gulf to just six minutes.The earthquake resilient bridge has been built in one of the world’s most seismically active areas.

Flint & Neill was responsible for the 2.7km long orthotropic steel deck structure, bridge structural health monitoring system (SHMS), geotechnical design assistance and client liaison services.

“The opening of the Izmit Bridge after just 42 months of construction is a fantastic achievement and Cowi’s support throughout the project period has without doubt been a major factor in this achievement. All team members can be very proud of having been part of this world class project and the final result,” said Cowi’s major bridges international project director Kent Fuglsang.


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