Cast iron manhole cover (ductile iron)

Product code: NHG-06

This product is produced according to BS EN124 standard.

Product details



No Product code Frame sizes (length x width  x height) Cover sizes (diameter) Load
1 NHG-06 850 x 850 x 75 650 12,5 tons
2 NHG-06 850 x 850 x 75 650 25 tons
3 NHG-06 850 x 850 x 100 650 40 tons

Size parameters

The European standard specifies the technical requirements for design and testing methods to the manholes cover and grating cover. They are used in areas which for vehicles and pedestrian. Depending on the design loading and the place of installation, they are divided into six classes such as B, C, D, E, and F.


- Group 1: Class A, loading capacity >= 15Kn ~ 1,5 tons. 

Areas where only passed by Pedestrians and Bicycles.

- Group 2: Class B, loading capacity >= 125Kn ~ 12,5 tons. 

Footways, parking or similar areas.

- Group 3: Class C, loading capacity >= 250Kn ~ 25 tons.  

The edge combinative area of vehicle road and the pavement.

- Group 4: Class D, loading capacity >= 400Kn ~ 40 tons.  Vehicle area and urban arterial road.

- Group 5: Class E, loading capacity >= 600Kn ~ 60 tons. Shipping port and parking apron area.

- Group 6: Class F, loading capacity >= 900Kn ~ 90 tons. Airplane taxiway and huge dock.


Material: ductile cast iron

Surface Treatment: The products are dry and cleaned of dust and painted with bitumen.