For fast passage of pedestrians, hand trucks or smaller trolleys, fire sliding doors with wicket/escape doors are suitable. For fire protection reasons, wicket/escape doors are equipped with slide rail overhead door closers.

High-quality overall appearance

• High-quality overall appearance with the patented groove/spring element connection
• 4D sliding doors offer a modern door appearance through a patented V groove at the element joint without visible screw connections.
• The high stability is ensured through the interlocked, toothed labyrinth plug-in profile.
• The elements are 72 mm wide, fully glued and flush, and aligned with each other through threaded rods.
• This creates a high-quality door leaf with parallel, uniform-width borders.
• The individual elements are up to 9 m high and are produced from a single piece without any weld seams. This results in a high-quality door appearance.

Precise door leaf guide

• Precise door leaf guide with patented track
• The cylindrical track roller and the stable track roller, in conjunction with the patented track, work together to provide an optimal force balance.
• Quiet operation and easy actuation is ensured, thanks to a suspension with ball-bearing.
• The track can be precisely adjusted in three dimensions using adjusting screws.
• A track panel in the colour of the door leaf results in a harmonious overall appearance.

Exclusive Pearlgrain surface finish

• Resistant Pearlgrain version
• For special requirements, a sliding door, including wicket door, can be produced with the Pearlgrain surface.
• This surface is resistant to mechanical damage during operation and fitting.
• The galvanized version is especially suited for use in warehouses and areas with frequent traffic.
• The track panel, weight box and profile all have smooth design.
• The Pearlgrain surface is optionally available in a RAL colour of your choice.

Wicket door without threshold rail

• Wicket doors without threshold rails provide more convenience and safety
• 4D is the only manufacturer with licensed trip-free wicket doors for smoke-tight sliding doors.
• Opening the wicket door in both directions is possible, depending on the rescue route planning.
• It can be variably fitted to either open into the reveal or away from it.
• Furthermore, two-wicket doors per door leaf are possible, opening in opposite directions, as well as glazing in the door set.