welded steel grating, water leakage area reaches 83.3%, which is more than two times than that of cast iron.

1)Designed and manufactured with pressure welded steel grating, and widely used in the industrial and civil constructions.

2) Hot-dip galvanized: Good antirust performance, maintenance free and replacement free.

3) Design of preventing theft.

4) With large span, the cost is lower than that of cast iron when under heavy load.

5) High strength.

6) Many specifications available.

7) OEM service available.