2 galleries work synchronously, only 1 gallery can work in an adjusting mode. The synchronous operation is ensured by a synchronizer which is situated between the galleries. The galleries have 2 control panels. One control panel is situated on the galleries, the second one is on the column. The control ensures a safe work for workers and eliminates the movement up with open gates and dropped stairs for passage from the gallery to the roof.
The galleries have an audible and light alarm (during the movement of galleries up and down) as well a warning alarm (that the galleries are up and the work is done on them), eliminating the presence of a person or other objects by sinking of galleries to their starting position. There are emergency buttons on the column elevators and on the galleries.
The control panel on the column has a special access with a key and makes it possible to lift or sink the galleries directly from the floor in worst-case situations.
Lifting and sinking drives have a tracking loop and ensure movement synchronism and evenness. To avoid accidents the gallery structure eliminates the possibility that foreign objects can fall between galleries or side and front galleries, The working area of galleries has a closed sheathing from the sides of the columns and gates. The galleries have stationary stairs which make it possible, in any situation the service personnel to leave the gallery without obstruction in case of an emergency and to go up, if necessary, to the gallery, which makes the maintenance flexible and convenient, The gallery floor is made of a dinking metal sheet. On the galleries there are special lamps of a dust-ignition-proof construction providing the working place with illumination of 500 lx. Besides, on the galleries there are air sockets for the quick connection of pneumatic tools. For the treatment of front walls there are front galleries between the workstations (between galleries). The front gallery is destined for one worker. It moves on the columns upright and forward along the front wall. On the opposite side of the car the second gallery moves towards; at that the minimal distance between the galleries is 400 mm. On the gallery there is a control panel from which the worker being on the gallery controls its movement in the area as well lamps with illumination of 500 lx. After work the worker removes the front gallery from the car, moves it down and goes out.