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Sliding Doors

A sliding door is a type of door which opens horizontally by sliding, usually parallel to a wall. Sliding doors can be mounted either on top of a track below or be suspended from a track above and some types 'disappear' in a wall when slid open, Sliding doors are commonly used as shower doors, glass doors, screen doors, wardrobe doors or in vans.

Sliding Door Gear

The mechanism used to operate a sliding door is called sliding door gear. There are two standard types, top hung or bottom rolling systems. Both types do not have a perfect seal. To reduce air- and smoke-tightness and sound insulation, brush seals are commonly used.

Top Hung Sliding Doors

Bottom rolling Door gear

Lift and Slide Door Gear

A sliding door that is lifted from the frame during opening and closing is called a lift-and-slide door. This allows for a better seal, with less draught and better sound proving.

Automatic Sliding Doors

Some sliding doors contain a motor and activation system to open them. These are called sliding door operators. Automatic sliding doors are commonly found in offices and shop entrances. These doors contain a magnetic locking mechanism that automatically unlocks during emergencies.


Advantages of sliding doors are that there is almost no room required to open the door, they are relatively easy to automate. The mechanism is also secure, since it cannot be lifted out of its hinges. Sliding doors are commonly found as store-, hotel and office entrances, elevators, patios doors, closet doors and room dividers. Transport industries also use sliding doors in vans, trains and metro.