Correctly installed sliding gates provide very high levels of security, especially against attempted forced entry. The fact they slide sideways means that a lot of space is left free behind the gate where a normal swing gate would have to operate, making car parking and the like a lot easier. A sliding gate can be produced to very wide sizes very easily and generally only requires 1 electric motor to operate therefore saving money over the 2 motors required for a pair of swing gates.
Sliding gates fall into two categories; Cantilever and Tracked systems.
Cantilever sliding gate systems do not require a ground track – this can be advantageous where the driveway entrance slopes, busy or heavy traffic entrances or where minimal disturbance to the driveway surface is requested.
The main design difference from a tracked system is that the cantilever system has a special section bottom rail in which incorporates two sets of enclosed roller wheels set apart at a pre- determined distance attached to a large concrete foundation base.
The cantilever sliding gate is approx 1/3 longer than a tracked slider, the extra length acts as a counterbalance so that the gate is free to slide back and forth, supported throughout the entire opening/closing width by the roller wheels within the bottom rail.
There is a slam post assembly at one end and stops at the other end to ensure that the gate cannot slide free of it mountings and fall over. Often the lower leading edge has a wheel which engages into a guide/shoe to ensure correct engagement upon closing.
Sliding gates are usually held up-right by a guide rail and a roller positioned at the mid or top rail height. Harrogate Automation has developed a new system that allows the gate to be supported by internal rollers. This makes the design less industrial looking and improves the safety of the gate as traditional support structures usually have to be protected by additional safety edges