Retractable roof – Kufstein Exterior Heavy Project. The Kufstein Fortress Arena realized. The overall acoustics of the Project/Location: Festungsarena Kufstein, with its historical ambience provides space are improved when the roof is Austria a stunning backdrop for many types deployed, and the use of dynamic Architect: Kugel + Rein Architects and of open-air event. multi-colored lighting projected onto Engineers, Stuttgart, Germany, the membrane produces a dramatic www.kugel-rein.eu The unpredictable weather in the visual effect. Engineering: Kugel + Rein Architects and Austrian Alps has resulted in the Engineers, Stuttgart, Germany, cancellation of outdoor events at This creates a spectacular concert www.kugel-rein.eu this site and discouraged potential experience. Implementation/Fabrication: customers from booking events Hightex GmbH, Rimsting, Germany, due to lack of weather protection. Construction. The membrane structure www.hightexworld.com is circular and surrounded on its outside Fabric: SEFAR® Architecture TENARA® Concept/Design. Kugel + Rein, edge by a polygonal pressure ring, not Fabric 4T40HF Architects and Engineers, has designed unlike a giant 52 m diameter wire Photos: andi Schmid fotografie, Munich, a retractable circular shelter over a wheel, made up of fifteen equal www.fotolevel.de 2000 square meter (21,000 square segments. This “wire wheel” is an foot) courtyard. The translucent white efficient, highly pre-stressed structure membrane, which gracefully unfolds which besides absorbing the force of like a flower, can be opened or closed external wind also brings only vertical within four minutes to protect the area loads to bear on its foundations. from unpredictable weather conditions. This extends the use of the outdoor A retractable tensioned membrane space and avoids costly event roof system now protects the outdoor cancellations. event space. The roof can be quickly deployed when needed, and the 40% While the structure was initially light transmission of the SEFAR® designed as protection against the Architecture TENARA® Fabric retains weather, two additional benefits were the outdoor feel of the arena. Architecture Interior / Exterior Sefar AG Phone + 41 (0)71 898 51 04 Architecture Fax + 41 (0)71 898 58 71 Hinterbissaustrasse 12 [email protected] 9410 Heiden www.sefar.com Switzerland www.tenarafabric.com.