... to clean and attractive appearance.2) steel grating are widely used by various plants such as: electric power, petroleum, chemical ... factory, transportation, municipal, administration, parking lot etc.3) steel grating may be applied to platform, floor, walkway, stair treads, ... steel flat grates, 3. serrated steel flat gratingTypeWelded steel grating, pressure-locked, socket-welding Steel flat size20×3, ...