The old building of the port authority stands as one of the most unique in Tarragona, located at the end of Platja del Miracle. It is a concrete building with a complex geometry and a large glass envelope. The building has a basement (parking and installations), ground floor (the entrance hall and some ancillary buildings), four floors of offices and a higher floor for housing. The deck is partially covered with a small construction designed as a storeroom  for machinery.

The work included the inspection of the building, the drafting of a plan of tests, which will allow the definition of the structure, destructive and non-destructive, in order to determine the strength of the concrete and the possibility of acidic attacks. The work was completed by conducting a survey of the structure, by means of a finite element model in three dimensions, to which the data obtained in the research survey were incorporated. Finally a series of recommendations and proposals for intervention in the structure were provided.

A statistical study established the characteristic strength of the concrete, according to the recommendations contained in the CTE-SE and UNE-EN 1990. We also scoped the chemical attack on the structure, due to the combined process of carbonation and chloride from the marine environment.