Steel Grating Plate materials: mild steel or stainless steel. treatment:Untreated, Painting and Hot-dip Galvanized ISO 9001 Steel Grating Plate Model Desciption:1) Steel Grating Plate Bearing Bar: 20*3mm to 100*6mm.2) Steel Grating Plate Bearing Bar Pitch: 12.5mm, 15mm, 30mm, 40mm, 60mm etc., also could supply according to customer's requests. 30mm, 40mm, 60mm are the common spec..3) Steel ...