a. Class A15 manhole covers andgratings capable of withstanding a1.5 tones test load. Suitable for pedestriansfoot traffic and cyclists.

b.Class B125 manhole covers and gratings capableof withstanding a 12.5 tones test load. suitable for car parks and slow movinglight traffic.

c.Class C250 manhole covers and gratings capableof withstanding a 25 tones test load. Suitable for car parks and slow movingheavy traffic.

d.Class D400 manhole covers and gratings capableof withstanding a 40 tones test load. Suitable for carriageways, main roads andfast moving heavy traffic.

e.Class E600 manhole covers andgratings capable of withstanding a 60 tones test load. Suitable for docks,ports, aircraft pavements and motorways.

f.Class F900 manhole covers and gratings capableof withstanding a 90 tones test load. Suitable for particularly heavy wheelloads areas, such as aircraft pavements.