By using the pneumatic or hydraulic control gratings, stairways and back rests move down automatically to the tanker's top. In this position the system efficiently prevents the operator from falling between the safety rail and tank top.
The Protective System can be equipped with an optional automatic switch-off, stopping it before the grating and back rest reach the top of the tanker. The advantage of this is that the gantry and tanker never come into contact with each other.
