... trains, and ditch covers for heavy truck access. Features of steel gratings:Light weight, heavy-duty, large loading-bearing capacity, ... clean and installation, durable etc.heavy-load steel gratingsIntroduction:Wanjie brand heavy-load steel gratings have Super carrying capacity and ... 1992Marks:Example: G 325/30/100 WFG Heavy load steel grating,heavy duty steel grate,industrial heavy duty grid