ch Grating, U Channel Grating or Gully Grating.
Galvanized channel gratings have following advantages over cast iron:
Hot-dip galvanizing against corrosion, less maintenance needed and easy replacement;
Security design available: box with hinged lid and connection, security, safe, easy to open;
Large span grating cover saving investment using the lowest ratio of iron materials;
Higher strength than cast iron, can be used for terminals, airports and other large span and heavy load environment;
Fu