Square cast iron manhole cover (gray cast iron, ductlile cast iron)

Product code: NHG-04

This product is produced according to ISO9001-2015 and BS EN124 standards.

Product details


Size parameters


No Product code Frame  sizes (Lenght x Width x Height) Cover sizes (diameter) Load
1 NHG-04 850 x 850 x 75 650 12,5 tons
2 NHG-04 850 x 850 x 75 650 25 tons
3 NHG-04 850 x 850 x 100 650 40 tons

Size parameters

The European standard specifies the technical requirements for designing and testing methods to the manholes cover and grating cover. They are used in areas where for vehicles and pedestrian. Depending on the design loading and the place of installation, they are divided into six classes such as A, 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 lot 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: gray cast iron, ductile cast iron

Surface Treatment: The products are dry and clean of dust, can be painted at the request.