grating cover 1.Galvanized steel grating 2.ASTM A123,SS400 3.Common ... grating Steel bar grating can be used for: 1.Trench cover Application:city-road,plaza,landscape-gardening,dock,airport,parking-lot ... We are specialized inmetal trenches,steel trenches,grating canal,canal cover, steel grating has many advantage 2. Standard: it is manufactured ...