Ductile iron manhole cover

A15 - Areas to be used only by pedestrians and cyclists.

B125 - Pavements, pedestrianised areas and similar surfaces,parking areas and multistorey car parks.C250 - For covering devices installed on roadsides and in gutters at the side of streets.

D400 - Road surfaces (including pedestrianised streets), hard shoulders and parking areas for vehicles of all kinds.E600 - Areas used by heavy vehicles, such as surfaces in airport and dock facilities.F900 - Areas sudject to particularly heavy loading, for example surfaces in airports.