SNK MANHOLE COVERS & GRATINGS

GROUP

TRAFFIC DESCRIPTION

CLASS

PROOF LOAD KN

1

Area which can only be used by
pedestrians.

A15
ELD 2.5T

15 KN
25 KN

2

Suitable for use in light vehicle movement.

LD 5T

50KN

3

Suitable for use in service lane, parking
etc.

B125
MD10T

125 KN
100 KN

4

Gully tops for curb side of roads.

C250
HD 20T

250 KN
200 KN

5

Carriage ways of roads, hard shoulders &
parking areas.

D400
EHD 35T

400 KN
350 KN

6

Areas for imposing high wheel loads e.g.
docks & aircraft hangar.

E600

600 KN

CIRCULAR

SQUARE

RECTANGULAR

mm

inches

mm

inches

mm

inches

530

21"

300 x 300

12" x 12"

450 x 600

18" x 24"

600

24"

450 x 450

18" x 18"

900 x 450

36" x 18"

750

30"

600 x 600

24" x 24"

900 x 600

36" x 24"

900

36"

750 x 750

30" x 30"

1200 x 600

48" x 24"

1000

40"

900 x 900

36" x 36"

1200 x 900

48" x 36"

1400

55"

1000 x 1000

40" x 40"

1220 x 990

48" x 40"

1200 x 1200

48" x 48"

1500 x 1500

60" x 60"