It is an automatic roll forming line for the production of grates from strip for water discharging channels with simple "C" shape and "T" shape. The line presents two different set of rolls mounted side by side on the roll forming line. Cutting and punching are carried out before the roll forming in order to avoid to change the cutting dies. The change of width on the roll forming line is realized through spacers. Between the punching press, the cut and the roll forming line (bending) there is a motorized transport roll conveyor with a centering system from one profile to another. An unloading and stacking unit can be added as an option. The products that can be obtained from this line can be realized in different materials and thicknesses, depending on the customer's requirements.