... and trains, and ditch covers for heavy truck access. Features of steel gratings:Light weight, heavy-duty, large loading-bearing capacity, economical, ... platform for trucks and trains, and ditch covers for heavy truck accessType:W--welded steel grating L-- pressure-locked ... : AS1657-1992Marks:Example: G 325/30/100 WFG Heavy load steel grating,heavy duty steel grate,industrial heavy duty grid