Osera Bridge of the AVE over the river Ebro. Zaragoza. Spain. 2001
The bridge over the Ebro River is 546 m long and consists of a main bridge 384 m long with spans of 42 m + 60 m +120 m + 2×60 m + 42 m and an access viaduct on the right bank, consisting of a 16 m span + 6 24 m spans.
It is a unique viaduct, as the main span consists of a large box girder, Vierendel, where the train enters.
It has a total depth of 9.15 m and the webs are lightened by circular holes with a diameter of 3.8 m, spaced 6.00 m apart. The cross section has a slight trapezoidal shape with 13.7 m at the base and 16.56 m at the top.
The roof is also lightened, with the central part consisting of a series of transverse ribs also spaced 6.0 m apart.


