are used for bridge spans in excess of 350m.
Some of the world's longest bridge main spans are:
Bridge Name (Country)
Akashi-Kaikyo Bridge (Japan)
Xihoumen Bridge (China)
Great Belt Bridge (Denmark)
Runyang Bridge (China)
Humber Bridge (UK)
Jiangyin Suspension Bridge (China)
Tsing Ma (Hong Kong)
Verrazano Narrows (USA)
Golden Gate (USA)
George Washington (USA)
Tacoma Narrows (USA)
Plans had been approved to build a 3300m span suspension bridge across the Strait of Messina, but the scheme was mothballed. However the Government, under Silvio Berlusconi, indicated that they wanted to resurrect the project; feasility studies are ongoing.
A number of early suspension bridges were designed
without the appreciation of wind effects. Large deflections were developed
in the flexible decks and wind loading created unstable oscillations.
The problem was largely solved by using inclined hangers.
The suspension bridge is essentially a catenary cable prestressed by dead weight. The cables are guided over the support towers to ground anchors. The stiffened deck is supported mainly by vertical or inclined hangers.