... 1986 3.stair treads,Ditch cover , tank grating ,pavement grating ,Steel Flooring Steel Grating,Bar Grating,Ditch Covert, Stair Tread,pavement grating ... are recommended, America standard is available.4) Material: Mild Steel (Low Carbon Steel) or Stainless Steel5) Surface Treatment: Untreated, Painting or Hot ...