Vertically lifted structure mounted on cables suspended to the supports fastened on the roof.
Winding with (electric) drum motor, onto which cables of relevant sections are wound, passing in sequence through rotating rollers mounted on supports to the roof.
Each cable is wound onto a section of a drum of a different diameter, to make sure that the net remains parallel to the girder.
Controlled by remote controller.
Load - approx. 12 kg per linear meter.