... ,platform,stair tread,well cover,trench cover,checkered gratings, grating ladder,fencesand handrail,etc for construction project, oil project, ... be classified into Plain Style Steel Grating, Serrated Style Steel Grating andI Bar Type Steel Grating, etc,They are widely used ... ) Surface Treatment:Untreated, Painting or Hot dip Galvanizing6) Steel grating standards:A) China: YB/T4001-1998B) USA: ANSI/NAAMM ...