They are placed on stone cushions to provide a stable base. The caissons for the 254m-high pylons of the bridge weigh 32,000t each. Corrosion-proof steel wires hold the cables together. Two parallel cables, each measuring 3km-long and 83cm in diameter, carry the road. Dissing+Weitling architecture in collaboration with COWI provided the bridge design and A/S Storebælt maintains the bridge. It was built as part of the Storebælt road project. The bridge was opened to traffic in 1998 after nearly ten years of construction. The bridge has a main span of 1,624m, and total length of 6,790m. The suspension bridge spans the Eastern Channel, which is an international waterway. Great Belt Bridge, also known as the East Bridge, connecting Halsskov and Sprogø is the third longest suspension bridge in the world and the longest outside Asia. It consists of twin box girders made of an orthotropic steel structure that used 11,000t of galvanised steel wire. The bridge is designed for a 100-year lifespan and is built to withstand up to 148km/h wind speeds. Image courtesy of Bjørn Christian Tørrissen. Hardangar Bridge, the tenth longest suspension bridge in the world, was commissioned in August 2013. A night view of the Tsing Ma Bridge, which spans the Ma Wan Channel. Jiangyin dual three-lane bridge connects the cities of Jiangyin and Jingjiang in Jiangsu Province, China. Humber Bridge spanning the Humber Estuary served 6.43 million vehicles from 2011 to 2012.
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Nanjing 4th Yangtze River Bridge is the sixth longest suspension bridge in the world. Runyang Bridge on the Yangtze River connects the cities of Yangzhou and Zhenjiang. The Yi Sun-sin Bridge was opened to traffic in February 2013. Great Belt Bridge in Denmark is the third longest suspension bridge in the world and the longest suspension bridge outside Asia.
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China's Xihoumen Bridge connects Cezi Island with Jintang Island. Akashi-Kaikyo Bridge in Japan is the longest suspension bridge in the world.