Shaft Pipes:
These are an integral part of almost all manhole systems. They are basically polymer concrete cylindrical shafts which are attached to the top of the manhole to level the manhole system to the ground level. Al-Qudaibi's shafts are manufactured in different sizes and lengths.
Table 1.2 below displays the typical specifications of the shaft pipes.
DN |
ID(mm) |
OD(mm) |
Wall Thickness WT(mm) |
1000 |
1000 ± 6 |
1100 |
50 |
1200 |
1200 ± 10 |
1320 |
60 |
1500 |
1500 ± 10 |
1640 1680 1740 |
70 90 120 |
1800 |
1800 ± 12 |
1980 2020 |
90 110 |
2000 |
2000 |
2200 2420 |
100 210 |
Table 1.2
