1. According to BS EN124:1994,

2. the material grade: GGG500/7,

3Coating: black bitumen, epoxy powder.

4:Ductile iron manhole covers and gully grates are divided into the following classes:

A15, B125, C250, D400, E600 and F900.

1: (class A15 minimum) Test 1.5 metric ton

2: (class B125 minimum) Test 12.5 metric ton

3: (class C250 minimum) Test 25 metric ton

4: (class D400 minimum) Test 40 metric ton

5: (class E600 minimum) Test 60 metric ton

6: Square/ Round Ductile Iron Manhole Cover and Frame

Heavy Duty Square and Rectangular Manhole cover and frame.

Medium Duty Square and Rectangular manhole cover and frame.

Light Duty Square and Rectangular manhole cover and frame.

Circular cover with circular frame

-Circular cover with square frame