The 96.6 m long structural steel cantilever roof of the hangar is designed to house 747 Jumbo Jets. The highest point of the roof is located 32.3 m above ground level to accommodate the tail of the aircraft and overhead equipment. The cantilever structure is anchored to rock by means of specially coated corrosion-proof prestressed anchors for which 24 mm diameter 8 cables have been used.

The roof is a structural steel cantilever truss suspended by structural steel stays, struts and back-stays which can all function under stress reversals. The clear stayed cantilever is 78 m. It was a world record, at that time, for this type of cantilever roof.