The building design had to consider the seating arrangement for over 91,000 spectators. The seats and the athletic fields are housed in the inner concrete bowl, similar to an egg in a bird’s nest. The stands that hold spectators, located in the bowl, were constructed as eight different zones. Each section of the bowl is like is like a building, there are eight different “buildings” all working together; each with their own stability system. The bird’s nest is prepared to withstand an earthquake of up to magnitude 8 on the Richter Scale.