Throughout history, the human being has evolved to save those elements of the orography that were a barrier in its communications, improving over the years, the constructive processes, reliability and lights to save.

Bridges are, together with tunnels, one of the most difficult and structurally responsible works. In addition, in the case of rehabilitating historic bridges, this is aggravated due to the fact that, sometimes due to existing pathologies or new uses, they pose structural and calculation challenges, which are also conditioned by the geology of the area, land use and flooding and inundation flows.

ARIN has successfully designed and implemented many types of bridges: prefabricated concrete, metal, mixed, post-tensioning… and with various implementation technologies.