... -100mm 3.Plain, I-shape, Serrated 4.Galvanized, Black, Steel Grating Size fields:1) Bearing Bar (Load Bar) Specifications ( ... available.4) Steel grating Material: Mild Steel (Low Carbon Steel) or Stainless Steel5) Surface Treatment: Untreated, Painting ,Powder coated or Hot dip GalvanizingFeatures:High ... water plant, defense project, chemical factory and so on. hot dip galvanized serrated steel grate