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Single-leaf overhead door

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 Fire resistance:
EI 30  EI 60  EI 120

Door size:

Designed per custom specifications

Overview, Design & Properties

The Marc-O vertical sliding door comprises the following basic components: the door leaf, two guide rail sets, the counterweight with pulleys and carrier cables/belts, and horizontal and upright labyrinth sealing components. 

The door leaf (60 or 100 mm for EI120 or EI30/EI60, respectively) comprises upright panels which can be 400 to 1200 mm wide, two side profiles, the bottom profile, bracing hardware and cladding of galvanized sheet steel.

Each door leaf panel features a modified, fire-resistant mineral wool core in class A1 with internal reinforcement formed by steel bars (a solution protected by European Patent no. W 02/079600A1).

The door leaf runs in two guide ways installed on both sides of the installation opening.

The guide rail and shaft box fascias are available in galvanized sheets coated in three basic colours, RAL 7035, 9002 and 9010.. 


The overhead doors can be optionally provided with a man door. The standard man door version is provided with a lever tumbler lock, double-sided door handle hardware and spring-return hinges.


The Marc-O overhead fire doors are intended for regulatory-compliant separation of fire zones inside and outside of buildings and across handling system flows. 

The product is mainly intended for manufacturing facilities, warehouse rooms, and cultural event venues, which may include theatres and opera houses. It is a perfect wall closure solution whenever the installation clearance can only be provided above the wall opening.

The overhead doors can have optional man doors; if the parking space beneath the overhead door is limited, the door can have a 2 or 3-section telescopic leaf.

Operating principle

The basic door version has the leaf closed by gravity-assisted movement of the counterweight. The door can be held open with an e-mag holder wired to the on-site fire alarm control panel. In the event of a fire alarm, the control panel releases the e-mag holder and the door leaf closes the passage between the fire zones. The door can be opened manually. The door can be optionally provided with an electrical drive unit which operates the door to open and close. Small door sizes can be delivered without a counterweight.


Optional Accessories

  • Available in PN-EN 13501-2:2016 smoke control class Sa and S200 on individual request

  • Available in an Ex-proof version [PN-EN, ATEX] on individual request

  • The door components can be ordered finished in any RAL palette colour or in stainless steel

  • Available with an electric drive unit also with gravity-assisted closing action or with manual opening action

  • Version with a man door available with a threshold

  • Available with more than one man door per leaf

  • The door leaf is lockable in the closed position

  • Can be provided with a wide range of electrical accessories, including fire alarm systems, curtain position monitoring, and access control solutions

  • Fire alarm control panel with an UPS pre-wired for interfacing with the field fire alarm system and/or local smoke/heat detectors

  • The electrical accessories can be kitted with the fire alarm control panel and include: remote control panel, smoke and/or heat detectors, fire alarm indicators (sounders and/or beacons), and an open and/or closed position sensor

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