Warsaw, Poland, 2011
gmp · Architekten von Gerkan, Marg und Partner; JSK Architekci sp. z o.o.; schlaich bergermann partner
World Stadium Awards 2012, Ingenieurbau-Preis 2012, Ingenieurpreis des Deutschen Stahlbaues 2013, IOC/IAKS Award 2013
Narodowe Centrum Sportu Sp. z o.o.
conceptual design, construction design, technical spots check, site supervision
Achieved for first time in stadium history, the all-weather moveable membrane of the retractable roof is mechanically operated and hydraulically stressed, and it slides in a tangential direction to punctually fix itself at the unobstructed radial cables, ensuring a safe and redundant driving mechanism throughout the seventeen minutes of deployment that is required for it to meet the main roof and seal the stadium.
The retractable part of the roof is built from 9800 m² PVC-coated polyester membrane. The flexible membrane spans in tangential direction between polyester belts, which run parallel to the upper 60 cables. At specific points these belts are punctually fixed to the sliding carriages and through those to the radial cables. Due to the minimized layout of the cable structure of the retractable roof, for the first time ever in roofs of such dimensions center hole sliding carriages could be developed. The fact that the carriages can slide along the radial cables without any obstacle leads to a safe and redundant driving mechanism.