Round bolted manhole cover

Product code: NHG-03

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

Product details


No Product code Frame size Load
1 NHG-03 820 590 560 90 18 12,5 tons
2 NHG-03 920 590 660 90 20 12,5 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, which 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 for only passed by Pedestrians and Bicycles users.

- 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: gray cast iron

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