Sectional doors open vertically and thus create more space in front of and behind the door. The door sections are parked flat underneath the ceiling, vertically above the opening or in line with the roof. Series 50 sectional doors, made of steel, steel/aluminium combination or aluminium, are set apart by the programme range, top door design and certified security. Compact sectional doors stack the individual sections vertically, right behind the lintel. The small distance back is a special advantage for halls with domelights, glass roofs or glass facades.