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Sliding Fire Doors

Rocklite® Sliding Fire Doors

ROCKLITE® Class B single and double fire doors are manufactured to SANS 1253:2003 (edition 3) and stringently tested by the SABS over the years with a proven fire protection rate of two and a half hours. Our ROCKLITE® sliding fire doors are also manufactured according to SANS 1253:2003 (edition 3) and have many other advantages over traditional fire doors.

*ROCKLITE® sliding fire doors are lightweight. Putting less strain on the sliding gear and therefore lasting longer. They are manufactured in a wide range of sizes and veneers to match existing surfaces.

*Constructed with an inner monolithic, asbestos-free, fire resistant core, ROCKLITE® sliding fire doors have reinforced steel inserts strategically located within the core material to strengthen hinging and hydraulic closure attachment.

National Test Standards:

GENERAL REQUIREMENTS – A sliding door shall be so designed and constructed that, when the door is installed in accordance with the manufacturer’s instructions and closed:
•  The average floor clearance does not exceed 12mm, and
•  The average clearance between the door and the overlap section of the walls does not exceed 10mm, and the maximum clearance does not exceed 15mm.

  • STABILITY – the door or assembly shall withstand the prescribed fire exposure and effectively close an opening without the doors moving out of the frame by more than 25mm.

  • INTEGRITY – the door or assembly shall withstand the prescribed fire exposure without the development, at any point of the door, of a straight-through gap of width that exceeds 6mm.

  • INSULATION – the door or assembly shall withstand the prescribed fire exposure without the mean temperature of the exposed face rising to more than 140°C initial ambient temperature, or the temperature at any point of the face rising to more than 180°C above initial temperature.

  • IMPACT TEST (class C & D assemblies only) – enables the door to resist two successive impacts of a sandbag 250 mm in diameter and a mass of 27kg without the formation of any opening wider than 25 mm. This test, which is fully described in The South African National Standard – Section 5.5 and 5.6.

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Door Finishes:

Doors are clad with a variety of finishes including Masonite, Sapele Veneer, Commercial Veneer, White Oak Veneer, Poerier Formica and many more variants, as per customer requirements. A class ‘D’ Fire door is finished with either veneer on external side and concealed steel cladding or steel clad on external side, once again, this is as per customer requirements.

Horizontal Sliding Doors:

A horizontal sliding door shall be suspended from an overhead rail (or rails) that are protected from dirt and foreign matter. Floor-mounted guide rails shall not be used.

Vertical Sliding Doors:

Vertical sliding doors shall:

  • Move in protected non-combustible guides,

  • Be so arranged and controlled that they can descend completely within 30 s, and

  • Be so regulated that for the last 2 m of their decent they do not travel faster than 0.5 m/s.




The width and height of a sliding door shall be such that, when the sliding door is closed, each vertical boundary of the opening is overlapped by at least 75mm and the upper boundary of the opening is overlapped by at least 100mm.

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