Products and Services. The world of concrete


Diversification in Prosistemas



Industrial: Factories, warehouses, logistical plants, food industry, cold stores, pharmaceutical and chemical industries, large infrastructures –airports, maritime ports, railway stations, etc.- and industry in general

Commercial: Large commercial areas, parking lots, supermarkets

Decorative: Shopping centres, design offices

Military and civilian: hangars, very tough surfaces for heavy vehicles, weapons installations

Sports: Indoor and outdoor sports tracks, swimming pools

Special: Indoor and outdoor sports tracks, swimming pools

Structural Reinforcement and Concrete Pathologies Division

A school case, the Castellana 79 Project: How to demolish and rebuild a nine-storey building with four basements without anybody seeing it

Demolition engineering, reinforcement and restoration used to be noisy and indiscreet, but greater complexity sometimes requires executing monumental work without anyone realising it is being done, as in cases when it is necessary to preserve a façade or a neighbouring activity. Interior demolition work, underpinning and restoration of the emblematic FNAC building on Castellana, in the centre of Madrid, was a challenge. With its nine storeys and four basement levels, any integral demolition would have reduced the number of storeys allowed in a future licence for constructing a new building.

The work on the 2,000 square metres of basements was even more complicated, due to the proximity of a tunnel made by the public corporation Adif -Spain’s Railway Infrastructure Administration- and the foundations of large neighbouring buildings. The underpinning was a painstaking job that required the placement of almost 10,000 props just in the basements in order to guarantee the safety of the building as well as the personnel. It was necessary to create an immense temporary structure of galleries with modular beams to facilitate the access of machinery and the removal of thousands of tons of rubble. Robots carried out most of the demolition of the decks, but in some cases manual intervention of workers was necessary.

El encofrado y armado tenía la dificultad añadida de que exigía construir escaleras y las rampas para el movimiento de coches por el gran aparcamiento subterráneo. Para garantizar la longevidad de la nueva estructura se unió la losa de hormigón con los muros de contención del entorno del edificio. Fue una obra mayúscula que tuvo que tener en cuenta los exigentes plazos de ejecución -la entrega en plazo de los proyectos es uno de los rasgos no técnicos más valorados por los clientes de Prosistemas desde hace décadas- y conciliarlos con las mayores medidas de seguridad: no se registró ni una baja por accidente o lesión durante toda la obra. En total, se colocaron 24.000 metros cuadrados de nuevos forjados y se emplearon 1.300 metros cúbicos de hormigón para el refuerzo de zapatas y muros de los sótanos.
Las plantas superiores del edificio son de 1.500 metros cuadrados. En conjunto, la obra ha absorbido más de 23.000 metros cuadrados de forjados nuevos y más de un kilómetro de pilares de acero reforzados (más de 235 toneladas de acero).