... .6, 120, 130mm or as customers’ requirement.5Surface treatmentUntreated, Hot dip galvanized, Cold dip galvanized, Painted, Powder coated, or as ... of certain sizes through the processing of grooving, cutting, press-welding, and galvalizing. Gratings can be actually made from ... , load, span, sizes and shapes.Surface Treatment:Untreatment: blackTreatment: hot dip galvanied Press-welding steel grating