Longest span arch bridge

Longest span arch bridge
Who
Pingnan Third Bridge
What
575 metre(s)
Where
China (Pingnan)
When
28 December 2020

The longest arch bridge is the Pingnan Third Bridge, a road crossing which spans the Xunjiang river near Pingnan in Guangxi, China. The bridge, which was opened for traffic on 28 December 2020, has a main span of 575 m (1,886 ft), and an overall length of 1,035 m (3,395 ft).

The Pingnan Third Bridge is what's called a through-arch bridge, in which the deck is suspended below the load-bearing arch by cables. The arch itself was constructed using a method called concrete-filled steel tube (CFST), which combines the benefits of both steel and concrete construction. The solid-infill of the steel tubes prevents them from buckling, while the confining effect of the tube prevents the concrete from cracking and protects it from the elements.