Vittorio Grassi Architetto and Partners unveiled plans in 2016 for a bubble-shaped stadium in Italy that would be wrapped in a translucent ETFE membrane to optimize daylight. The naturally ventilated stadium in Lamezia Terme, Calabria, will serve as a 4,000-seat stadium for international sporting events for athletes with disabilities and will also host concerts, conferences and other events.

The stadium covers an area of 8,000 square meters, and its roof is made of thin steel members and a three-layer outer translucent membrane made of ETFE.

Due to the translucency of the structure, the appearance of the roof constantly changes, depending on the amount of natural and night light and the time of day. Constant pressure air pillows help maximize the use of natural light, reduce heat gain in summer, heat loss from the winder, and reduce energy consumption. The 4,000-seat capacity can be expanded to 5,000 seats for concerts, conferences and other events. The building’s energy and acoustic performance are also optimized, while meeting seismic requirements and taking advantage of prevailing winds for natural ventilation.

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