Model A Stud Mounted Manhole Cover
(mm)
| Model | Clear size | L1 | B1 | L2 | B2 | T | Stud (Substance) | Stud (Check hole) | Weight(kg) |
| L*B mm | Diameter | Quantity | Diameter | Quantity |
| A | 600*400 | 720 | 520 | 620 | 420 | 6 | M20 | 20 | M16 | 8 | 68.4 |
| 8 | 75.3 |
| 10 | 81.8 |
| 12 | 26 | 89.1 |
| 800*600 | 920 | 720 | 820 | 620 | 8 | 86.9 |
| 10 | 95.8 |
| 12 | 104.3 |
| 14 | 112.2 |
| 16 | 121.2 |
| 18 | 130.1 |
| 20 | 138.5 |
| B | 640*400 | 720 | 520 | 620 | 420 | 6 | 62.6 |
| 8 | 71.9 |
| 10 | 80.7 |
| 12 | 90.3 |
| 800*600 | 920 | 720 | 820 | 620 | 8 | 83.5 |
| 10 | 94.7 |
| 12 | 105.5 |
| 14 | 115.9 |
| 16 | 126.1 |
| 18 | 169.5 |
| 20 | 146.8 |
Marked sample: Model A Ballast liquid tank manhole cover with check hole which size 600*400
Marked as: Manhole cover 6CB/T3981-2008 A600*400-10
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