MRO Hangar for aircraft maintenance

Type: Fabric structure WSS (MRO aircraft hangar)

Width: 45 m
Length: 52.5 m
Height: 9 m

Dim. 45 x 52.5 m stands on the maintenance area of the Ljubljana’s Jože Pučnik Airport. In close cooperation with the client, and by carefully considering all the specific requirements of aircraft servicing, we planned, designed and erected a complete prefabricated aircraft hangar fitted with HVAC and lighting systems.

Requirements of the client:
• design which accommodates local height restrictions
• special air traffic control safety requirements
• double-pitched roof covered with insulating panel
• the building must be built on the existing asphalt base with new concrete foundations

Our solution:

• a low incline roof pitch on the lower side
• a steeper roof pitch on the upper side (tail of the plane)
• a double PVC membrane with trapped air on all walls
• height compensation with steel spacers
• 45 x 52.5 x 9 m aircraft hangar steel structure

The steel structure is made of welded and hot-dip galvanised profiles. The structure is attached to a concrete slab with chemical anchors. For the location of the installation, we had to design a structure with a snow load of 1.67kN/m2 and wind load of 0.65kN/m2.

The heating system combined with a ventilation system with an air exchange factor of 0.25 was installed. The installation of the heating system was included in the price of the building.
Gutters and snow guards take care of the drainage and facilitate easy maintenance during heavier snowfall.

As the hangar is intended for the maintenance and servicing of aircraft, easy access to the hangar and parking of the aircraft in the facility is crucial. Therefore, an automatic triple Championdoor door with a total width of 40m was installed in the building. The doors consist of a 12.8 m x 12.5 m middle part and two 13.5 x 8 m side wings and are covered with a grey flame-retardant PVC membrane with double UV protection. The vertical aluminium guides between the wings are 280 mm wide and are raised and lowered by an electric motor. This ensures free passage along the entire width.

The turnkey project also included a lighting system with LED floodlights, cable ducts, cables, a distribution box and a control panel. The heating and ventilation system was installed with gas-fired radiant tube heaters.

For the installation of heating and ventilation systems, the investor had to provide gas supply to the building, a control panel with the main gas valve and 100 millibar pressure regulation. The building also had to be provided with electrical wiring that can power the heating and ventilation system (2.6 kW).

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