1,Cast Iron Grating Description :
A grating is a removable plate forming the lid over the opening of a manhole, to prevent anyone or anything from falling in, and to keep out unauthorized persons and material.A grating sits on metal base, with a smaller inset rim which fits the cover. The base and cover are sometimes called "castings", because they are usually made by a casting process, typically sand-casting techniques.
1.Advantages: Good compressive, bending and impact strenth,anti-corrosion, not rust, long service life 
(at least 30 years). The quality meets the same kinds cast ion manhole covers but the cost is 30% lower than. Contain no metal and no recovery value, anti-theft.
2.Designs: based on EN124 standard and according to customer's drawing or samples.
3.Color: black, Grey, green, blue and Marble , etc.
4.Inspection: in-house or the third party as per customer's request.

2,Main Features of the Ductile Iron Grating:
B125: Footways, pedestrian areas and comparable parks or car parking decks.
C250: For gully tops installed in the area of curbside channels of roads.
D400: Carriage ways of roads(including pedestrian streets), hard shoulder and parking areas, for all types of road vehicles.
E600: Areas of imposing high wheel loads, e.g. dock and aircraft pavements
1) Production information
Manhole cover are manufactured for construction and public use. Manhole cover shall be smooth and free sand holes, blow holes, distortion or any other defects
2) Material 
A) Ductile iron GGG50
B) Grey iron GG20 
3) Designs
A) EN124 Class B125 C250 D400 F 900, with different size and grammage, or as  customers' requirement.
B) as per customers' drawing or samples

4) Process
A) Molding boards
B) Hand Casting 
3,Grating Images:

4,Grating Specifications:
 Material: Ductile Iron/Cast Iron/Aluminum
(1)The Standards: EN124
(2)Size range: DN200mm-1200mm
(3) Class: B125, C250, D400, E600, F900
(4)Shape: square, round, rectangle, triangle and so on.
(5) Printing: bitumen
5，FAQ:
We have organized several common questions for our clients，may help you sincerely：
Q. Can I fit a square grating into a round chamber?
A. Yes, there are a select few manhole covers which are square-to-round, meaning they will fit square or round chambers. 
 Q. I have a heavy traffic grating but it has been broken by a forklift, why?
A. Forklifts have solid wheels which apply pressure differently to standard pneumatics and therefore covers must be specially adapted to suit this.
 Q. The project I’m working on requires a grating with a quality finish, what’s available?
A. Naturally, galvanised steel of black polypropylene aren’t always ideal, and so we offer brass or stainless steel edging, as well as complete stainless steel grating.
 Q. Odours are coming through where I have installed my grating, why?
A. Your cover must be sealed and locked, or neoprene sealed, so you would require a T-Range Cover, or if you require a solid top, a selection of the PC range (e.g. PC2BG3, PC6CG3, not PC2BG) are suitable.
 Q. I need access through my grating on a regular basis, is this possible?A. Yes, the majority of covers have built-in lifting keys, and for those that don’t we also supply lifting keys. However, the best way to obtain easy access is to have a bespoke, hinged grating.