STANDARDS & SPECIFICATIONS FOR THE BRITISH AND EUROPEAN
MUNICIPAL DRAINAGE & CONSTRUCTION CASTINGS

BS 497: Part 1: 1976 – Specification for manhole covers, road gully gratings and frames for drainage purposes. Cast Iron and Ductile Iron castings. Replaced by BS EN 124:1994

BS EN 124 – Standard Classification

Group 1 – Minimum Class A15 – Access covers and gratings capable of withstanding a 15 kN test load.
For use in areas where only pedestrians have access.

Group 2 – Minimum Class B125 – Access covers and gratings capable of withstanding a 125 kN test load.
For use in car parks and pedestrian areas where only occasional vehicular access is likely.

Group 3 – Minimum Class C250 – Access covers and gratings capable of withstanding a 250 kN test load.
For use in car parks, forecourts, industrial sites and areas with slow moving traffic.
Also in highway locations up to 500 mm from the kerb and up to 200 mm into the verge, excluding motorways.

Group 4 – Minimum Class D400 – Access covers and gratings capable of withstanding a 400 kN test load.
For use in areas where cars and lorries have access, including carriageways, hard shoulders and pedestrian areas.

Group 5 – Minimum Class E600 – Access covers and gratings capable of withstanding a 600 kN test load.
For use in areas where high wheel loads are imposed such as loading areas, docks or aircraft pavements.