Exterior productivity door with fast vertical fold-up. Multifold steel structure. Motor unit in the header accessible from above. ® ® Copyright NERGECO 25/08/2009 Version A Enduro Trekking A is the first industrial fast flexible door designed for exterior openings up to 8 x 8 m and its mechanism can be accessed from above. It can be fitted with a single layer curtain, or double layer curtain for increased insulation. Also available in the same product line : Enduro Trekking B (front access),Trekking C (access from below), Enduro Puissance for strong winds, and Enduro Forum for interior, including experience in productivity doors for your industry, your process, your site Over 25 years'corridors.