Martutene Bridge

The main characteristic of the Bicontentio bridge in Martutene (San Sebastián) include shape that mimic bending moment diagrams, hidden abutments, and neutral colours, that integrate the natural terrain with the support structures. To achieve a more slender appearance, the cross-sections along the length of the bridge prototypes are very variable.

The bridge is elastically fixed on both abutments. This connection is accomplished by placing two pinned supports close to each other. One works in compression, the other in tension. The 15.5 m wide deck consists of a concrete slab supported every 2.6 m by transverse steel members. 

The main beams that support the 15.5 m wide deck have a total length of 64.4 meters, with a main span of 51.52 meters and two shorter of 6.44 meters.