Xihoumen Bridge 2009

Xihoumen Bridge 2009

© 蜡笔 MR

The Bridge

South of Shanghai is a group of islands in the East China Sea connected to the mainland by a series of five bridges in a 46km crossing. The main island is Zhoushan and the largest crossing is the Xihoumen Bridge.

It has a central span of 1,650m, one of the world’s longest, and has a twin-box deck design, pioneered by Bill Brown in the 1990s. The deck has the two streamlined-box girders connected by cross-diaphragms to achieve aerodynamic stability for such a long span.

The northern tower is sited on a small rocky outcrop and has a 578m suspended side span to the island of Cezi. The south tower is on the Jintang Island with a self-supporting (viaduct) side span.

Xihoumen Bridge

Part of a 46km link to the Zhoushan Islands, China

Key Facts

Twin-box deck girder road bridge

Longest main-span bridge of the Zhoushan Islands and Mainland Link Project


Zhejiang province, China

The bridge links Jintang and Cezi islands

Connects Ningbo with the Zhoushan archipelago

Designers / Engineers

China Communications Construction


Steel suspension bridge

1,650m main span

2,588m total length

Main contractors

China Communications Construction

Sichuan Highway and Bridge Construction


Began in 2005

Opened in 2009

Other long-span bridges