The exchange of disused hangar doors during normal functional mode, without affecting the operations of a heavily frequented business airport, was the great organizational challenge that Butzbach had to deal with when replacing a hangar door of the hangar 8 at Lyon Bron Airport.
For reasons of price the Airport had opted for folding doors only a few years ago but was already dissatisfied shortly after commissioning.
Numerous defects, total failures and the non-compliance with safety standards spoke against the repair of these doors and brought Butzbach into play.
In order not to interfere with the ongoing operation and to be able to reliably close the hangar every evening, the new door system was installed with the aid of a porch roof in front of the existing folding doors still in place. Once a new door leaf was installed, the old door element could be dismantled. Now the door system fulfils all defined requirements to the full satisfaction.
Due to the low weight of the door leaves (consisting of an aluminium frame construction and fibreglass filling) the five individual door leaves of the almost 120 m wide and 9 m high door system can be operated manually. The door leaves can be moved easily on the special rails by one person, thus a constant availability of the system, even in case of power failure, is guaranteed.
State-of-the-art security devices such as integrated pendulum brakes, which act as a speed limiter for manually operated doors, or a storm protection (prevents the door leaves from being lifted out of the guide rails in the event of a gust of wind) ensure optimum protection of the door system and personnel in the hangar.
The fibreglass door filling in the colour Brilliant allows natural day light to be spread softly and glarefree into the interior of the room, whereby the entire hangar surface can passively be used as an illuminating surface. This creates optimal working conditions in the hangar.