... polyonal oil plantforms.Series 2(spacing 40mm) steel plate is special for the application and development ... 25,30,30.16,32.5,34,40,41.25,45,50,60,60.32,80,100mmetc ... recommended . American standard is available4)Material :Mild Steel(Low Carbon Steel) or Stainless Steel5) Surface Treatment:Untreated, ... Painting or Hot Dip Galvanized6)Steel Grating Standards:A)China:YB?T4001-1998B)USA ...