Fields on styrofoam
The essential point of the new stadium plan is that the fields are laid on a 65-centimetre thick styrofoam layer. They are inside a 1.20-metre high concrete basin, which has the shape of a cross. The stadium is built around ‘the leg’ of the cross.

Moving over the water
In the floor of the basin are drainage tiles. By means of a pumping unit and the use of surface water, the basin can be filled in a simple way. To move a field, only a limited layer of water is required. Because of the specific gravity of styrofoam (0.0034 sg) the fields will easily start floating. In the styrofoam floors of the fields pipes have been installed in which stem propellers are mounted. By activating the propellers, the fields can be moved any direction.

Protecting the styrofoam
As soon as the fields have been moved into place, the basin can be drained empty. The fields will sink to the bottom of the basin floor. In order to protect the styrofoam against any damage, a profile of agent S (PA) is mounted around the foam's outside.

A football field or a different field
For a football field of natural grass a minimum of 45 cm of earth is required. Thanks to the supporting power of styrofoam (650 kg/m3), making a football field mobile is no problem. Also, fields for different sports, exhibitions and concerts can be mounted on the styrofoam floors with no problem at all.
As a matter of fact, the basin floor can also be used for an exhibition or a concert, without a field. The fields outside can also be used for anything at the same time.

Mobile stand
At the side where the basin leaves the stadium, the stadium has a mobile stand. It is therefore not necessary to build an expensive roof on top the basin.

TU Delft research
A research of the TU Delft proves that the floating system for stadium fields is effective and reliable, and has been assessed positively.