The FOCSA rises to a height of 402' above the footings; 11" bearing walls separate the apartments and in turn support the 6-3/4" reinforced concrete slabs at each level.
The bearing walls are solid and have no openings except at the basement and lobby floors to facilitate access between rooms.
There is an additional concrete mass at the center of the Y, (apartments F and G), to increase resistance to lateral forces.
The walls extend through the rear wall to support the corridors.
The wall and slab structural system form a three-dimensional lattice resisting horizontal forces.
A high strength concrete mix from 3,000 to 7,000 psi.
was used.
The tower and corridors show prefabricated panels  on the exterior.
Reinforced concrete columns support the podium and the stories below.
The residential block, the 'Y,' is supported by thirteen eleven-inch walls.

The building was chosen in February 1997 by the Unión Nacional de Arquitectos e Ingenieros de la Construcción de Cuba (UNAICC) as one of the seven wonders of Cuban civil engineering.
The FOCSA rises to a height of 402' above the footings; 11" bearing walls separate the apartments and in turn support the 6-3/4" reinforced concrete slabs at each level. The bearing walls are solid and have no openings except at the basement and lobby floors to facilitate access between rooms. There is an additional concrete mass at the center of the Y, (apartments F and G), to increase resistance to lateral forces. The walls extend through the rear wall to support the corridors. The wall and slab structural system form a three-dimensional lattice resisting horizontal forces. A high strength concrete mix from 3,000 to 7,000 psi. was used. The tower and corridors show prefabricated panels  on the exterior. Reinforced concrete columns support the podium and the stories below. The residential block, the 'Y,' is supported by thirteen eleven-inch walls.
The building was chosen in February 1997 by the Unión Nacional de Arquitectos e Ingenieros de la Construcción de Cuba (UNAICC) as one of the seven wonders of Cuban civil engineering.
FOCSA Building