The two towers, designed by the well known architect Toyo Ito, are approximately 120 m high. Each has its own function: one is a hotel and the other is a 40,000 m2 office building.
Since these are buildings of more than 120 m and approximately 28 floors, they required the use of a system able to perform the work at height quickly, safely, and with quality. For this reason, ULMA Construcción used the ATR Self-climbing System, from the underground floors to the upper levels. It is a conventional climbing system to which mechanical and hydraulic solutions are added to enable lifting the system without the use of a crane.
The peculiar silhouettes of both buildings required specific concrete cores. The core of the hotel building, with a cylindrical geometry, 13 m diameter and 40 cm wall thickness, was solved with an interior platform and outer brackets, both self-climbing. Moreover, the rotation effect was obtained with the variation of the surface from one floor to the other, from 700 to 1,000 m2. The rectangular geometry of the office building, with 45 cm wall thickness, was solved with three interior platforms and outer brackets, all self-climbing.
