... tread, well cover, trench cover, compound gratings, storage shelves, ladder, fences and handrail so on for construction project, oil project, seaport, power ... access of sundries of 18mm in diameter. This kind of gratings fit for pedestrian deck, walkway and ditch covers which require high ... of steel grating is the most commonly used in projects Gratings with cross bar centers at 50mm can bear lateral ...