Precast Concrete Manhole Covers and Frames
| Grade Designation | Type/Shape of Cover | Sizes (In MM) |
|---|---|---|
| LD-2.5
(Light Duty) |
Square, Rectangular & Circular | 300×300
450×450 600×450 600×600 900×700 560 Dia |
| MD-10
(Medium Duty) |
Square, Rectangular & Circular | 300×300
450×450 500×500 600×600 450 Dia 500 Dia 560 Dia |
| HD-20
(Heavy Duty) |
Square, Rectangular & Circular | 600×450
600×600 560 Dia |
| EHD-35
(Extra Heavy Duty) |
Circular | 560 Dia |
Precast RCC Rain Water Harvesting Covers (with frames)
| Grade Designation | Type/Shape of Cover | Sizes (In MM) | Shape & Size of Holes | No. of Holes |
|---|---|---|---|---|
| LD – 2.5 | Square, Rectangular & Circular | 300×300
450×450 600×450 600×600 900×700 560 Dia |
1″ Round
2″ Round 2″ Round 2″ Round 2″ Round 2″ Round |
4
12 9 16
|
| MD – 10 | Square, Rectangular & Circular | 500×500
600×600 450 Dia 500 Dia 560 Dia |
2″ Round
2″ Round 2″ Round 2″ Round 2″ Round |
9
16
|
| HD – 20 | Square, Rectangular & Circular | 600×450
600×600 560 Dia |
2″ Round
|
16
13 |
| EHD – 35 | Circular | 560 Dia | 2″ Round |
|
