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
