The Mitjavila Bridge crosses over the Valira River in Andorra la Vella. This is a composite bridge made up of two branches: one is straight and skewed, the other curved.   Given the geometry of the branches and the necessary minimum depth, a condition required by the need to leave the river´s hydraulic capacity unaltered, we decided to hang the deck from two metal spheres located in the vortexes of a tetrahedron formed of a series of tubes.


The deck is made up of two branches, one of which is curved and the other straight and skewed, situated in an inclined plane.  Due to the plan geometry of the branches and the essential requirement of a minimum depth in order not reduce the river´s hydraulic capacity, we proposed a cable-stayed solution with a composite, steel-concrete deck. The structure hangs from two points placed on the axes of the branches.  The stay cables are made from 85/105 quality steel and their diameters are 36 mm and 50 mm.