they did it because there is a huge arch in the middle
Over 35,000 tons of steel were used in construction of the Lupu Bridge. The Lupu Bridge is a through arch bridge over the Huangpu River in Shanghai, China, connecting the city's Luwan and Pudong districts.
The most revolutionary arch bridge opened in 1994 is the Lupu Bridge in Shanghai, China. It is the world's longest steel arch bridge and features an innovative design with a unique shape and structural system that sets it apart from traditional arch bridges.
Austin Landi
the lupu arch bridge in shangai, china is the longest arch bridge in the world at 12,795 feet long. In the related links box below I posted a site where you can see many great pictures of it. they are very interesting. Even the arch has a trolly type train that passes on top. Check it out.
Lupu bridge
The bridge is supported by an arch or a series on arches to make the bridge stronger.
The Lupu Bridge crosses over the Huangpu River, in Shanghai, China.
steel
It is 1804.46 ft.
is the ponte vecchio bridge is an arch bridge
The brooklyn bridge is not a arch bridge
Luwan and Pudong.