Understructure with heights over 2 meters made of pedestals and stringers with square tubular section.Special understructure over 2 meters high made of pedestals and tubular steel stringers, having a 120x120 matrix upon which is laid another grid of size 60x60 cm. The panels are laying on this last grid. This particular type of steel structure used in the Data Center facilitates the walking under the floor of the personnel responsible of Server maintenance.