Compared with cost iron drain cover, the advantage of steel grating:

1. Saving material: the most economical method of using material at the same bearing condition, correspondingly, also less material of supporting structure.

2. Less investment: less material, less workman, shorter time limit of project, no need of clearance and maintenance.

3. Easy construction: fixed by installation fastener or welding, one person can finish.

4. Durable: hot-dipped galvanized, high attacking and heavy duty proof.

5. Modernization: beautiful appearance, reasonable design, good ventilation and daylight,

6. Light structure: less material, light weight, easy to be lifted and loaded

7. Dirt proof: no rain, no snow and dust

Ditch cover:

1. The anchors of frame must be firmly embeded in the cement layer.

2. the supporting surface on the opposite sides of ditch must be smooth and solid.

Standard:

China: YB/T4001.1-2007

UK: BS4592-1-1995

USA: ANSI/NAAMM(MBG531-88)

Australia: AS1657-1985