Interpenetrated gratings for shafts, from structural steel as per EN 10025, with bearing bars 8 or 4 mm and cross bars 6 or 8 mm, hot-dip galvanized as per ISO 1461, suitable for replacement of cast iron gratings, with a drainage surface bigger than 70%, heavy duty.
Great tolerance, lighter construction, hot-dip galvanized, bigger drainage in the same surface.