If a high bunching capacity is needed, it is necessary to adopt an offlet having an appropriate width. The material of the channel bottom may vary according to the specific parameters of what the premises will be used for, while the choice of the grid holder type (port. 40 or port. 20) and the size of the steel grid (thickness, crosspiece step and section) essentially depend on the loads they must bear and any production waste there may be on the floors. It is clear that the appropriate technical solution must be planned each time.