Helston, Cornwall
Built to house the Royal Navy’s Merlin search and rescue helicopter. This 2000m2 hangar is unusual in having an identical set of hangar doors at the front and at the back.
The REIDsteel rolling hangar doors have six slabs (7.7m high and 5.47m wide) on three tracks and the hangar has outriggers extending 3.5m beyond the edge of the hangar on both sides to allow a clear opening of 32m.
These door are manual opening and have a ‘cascade’ mechanism where each slab is driven through a cable and gearbox mechanism turned by one large handle. All six slabs operate together, with the two central doors moving three times as fast as the two outer doors, so that all the doors finish opening/closing at the same time.
This hangar and its doors took only twenty five weeks to design, manufacture and erect in spite of high winds and generally wet conditions.
Military Hangars:
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