Zürich metal-construction house holding 93 live VKF recognitions, and the broadest scope of any Swiss door manufacturer: Brandschutztüren (21), Brandschutztüren mit Verglasung (30), Brandschutztore (17), Brandschutztore mit Verglasung (9), vertical fire-rated glazing (14) and movable shaft fronts (2). It is the only holder in the register carrying double-figure approvals in both the hinged-door and the sliding-shutter families, glazed and unglazed.