Heavy Duty Cast Iron Channel Grating Square Storm Drain Grates For Drainage
Material | Ductile iron |
Surface Treatment | Painting |
Load | A15 B125 C250 D400 E600 F900 |
Standard | EN124-2015 EN1433 |
Feature | Easy to install noise reduction |
Eternal Size | Cover Diameter | Clear Opening | Depth | Weight | Loading Capacity |
φ600mm | φ512mm | φ485mm | 53mm | 55kg | EN124 D400 |
φ850mm | φ725mm | φ700mm | 100mm | 72kg | EN124 D400 |
φ850mm | φ680mm | φ650mm | 75mm | 54kg | EN124 C250 |
φ950mm | φ850mm | 800mm | 100mm | 95kg | EN124 D400 |
φ1150mm | φ1050mm | φ1000mm | 100mm | 210kg | EN124 D400 |
1. Shallow manhole
It is provided at shallow depth of 75-90cm (2'-3'). It is provided at the beginning of branch sewer or at a place not subjected to heavy traffic. It is provided with a light cover at its top it is also called inspection chamber.
2. Normal Manhole
It is provided in sewer line at depth of 150cm with a heavy cover on its top. It is generally of square shape (or rectangular shape).
3. Deep Manhole
They are provided at depth greater than 150cm with heavy cover at the top. The size is gradually increased and a facility for going down is provided.