best quality steel trench grating cover

best quality china steel trench grating cover, also known as water drainage steel trench grating cover,which is mainly used on road drainage system. Steel trench grating cover is dirt proof: no rain, no snow and dust. Grating trench cover used in walkway, carriageway, courtyard or other constructions. Used as cover for drainage trench, wireway, subway, air pit, etc. Hot-dip-galvanizing for surface treatment.

2. Grating trench cover composed by fixed fram & removable grating cover. It can be noted as GT & GU in terms of their different structures.

3. Grating pit cover used in catch basin, sand sediment trap, draining well, & sink hole for road, park & other civil projects. It’s generally designed as the evertile & its start-stop angle is 110°. The grating with pin joint is not only good to guard against theft but also simplify the construction procedure