The Natatorium contains four pools arrayed in a row: two standard-sized, one for diving and a leisure pool. It has over 3,500 fixed seats, which will be expanded to 5,000 for the world championships, to meet FINA requirements. The swimming hall is a closed building with a rectangular ground plan, a main structure of reinforced concrete
and a roof structure of sectional steel girders.
The roof structure with triangular glass surfaces is around 210 m
long, 120 m wide and 22 m high. Direct, intrusive sunlight is forestalled by means of narrow toplights along the beams, without preventing natural daylighting.