How to choose a manhole cover with load ratings?_D400(40TON) Composite manhole cover

A15(5 Tonnes)
Areas which can only be used by pedestrians and pedal cyclists.

B125 (12.5 Tonnes)
Footways, pedestrian areas and comparable areas, car parks, or car parking decks.

C250(25 Tonnes)
For gully gratings installed in the area of kerbside channels of roads. This area extends from a maximum of 0.5m into a carriageway to a maximum of 0.2m into the footway. Recommended for minor roads/areas of slow moving traffic.

D400(40 Tonnes)
For covers and gratings used in carriageways of roads (including pedestrian streets), hard shoulders and parking areas, for all types of road vehicles.