According to EN124:1994 with good unit weight, testing before shipping for the smooth surface and loading strictly!

Ductile iron manhole cover and gully grating, the inspection certificate to be provided according to BS EN124:1994, the material grade GGG500/7, coating black bitumen, testing before shipping for the smooth surface and loading.

Ductile iron manhole covers and gully gratings are divided into the following classes:

A15, B125, C250, D400, E600 and F900.

A15 - which can only be used by pedestrians and pedal cyclists.

B125 - footways, pedestrian areas and comparable areas, car parks or car parking decks

C250 - for gully grating installed in the area of kerbside channels of roads which when measured from the kerb edge, extend a maximum of 0.5m into the carriageway and a maximum of 0.2m into the footway.

D400 - carriageways of roads (including pedestrian streets), hard shoulders and parking areas, for all types of road vehicles.

E600 - areas imposing high wheel loads, e.g. docks. aircraft pavements.

F900 - areas imposing particularly high wheel loads. e.g. aircraft pavements.