Hangar Grely, Sion

Sion airport has developed a project for 18 000 m2 of halls dedicated to maintenance, hangarage and handling. This large-scale project is the most important ever built at the airport. It was entierly designed with sustainable development principles in mind.

This airport is one of the facilities included in the sectoral plan for Swiss aeronautical infrastructures. This project is located in the south-western zone of the airport, on a plot of land of about 45 000 m2, enclosed in the middle of the military zone. Approximately 2 ha of this area will be used for buildings and 2.5 ha for tarmac and other facilities for air and ground traffic. The complex consists of 10 halls and 2 administrative buildings. The space between the hangars and taxiways is occupied by tarmacs for parking aircraft. The surface area is approximately 2 ha. The entire development includes the creation of approximately 200 parking spaces for private and operational vehicles.

Taking into account aspects of sustainable development, the ground horizons at Sion Airport consist of a layer of topsoil and a layer of silt about 1 metre thick, the lower horizon of which coincides with the water table. The roof spans are of the order of magnitude of 45 metres and the trusses have to be supported longitudinally by struts above the large shed doors.

The floor was separated from the rafters by the use of 14 cm thick Swisspor XPS Jackodur panels. For the roof and facades, double-sided metal panels with intermediate insulation were used. They form the main part of the building envelope. The roof, with a total global surface area of 18 000 m2, is equipped with active photovoltaic panels. Rainwater is collected and a ventilation system is used to collect and recycle the air.