A Cover That Helps Prevent Sinking
Sinking manhole covers can create uneven surfaces on airport runways. This Self Leveling Ductile Iron Manhole Cover is designed to help address this issue. It carries an F900 load rating, the highest load class specified for this product range. Airport runways and military facilities are its primary applications. Made of ductile iron and finished with asphalt paint, it features a self-leveling structure integrated into the frame.

Wide Opening, Level Fit
The clear opening measures 900×900 mm, and the frame measures 1026×1026×100 mm. The self-leveling structure helps the frame stay securely seated against the road surface, reducing the risk of sinking. Custom logos are available upon request. This model is suitable for airport runways, military facilities, docks, ports, and other areas exposed to extremely heavy wheel loads.

Specifications at a Glance
|
Item |
Details |
|
Load Rating |
F900 |
|
Material |
Ductile iron with asphalt paint finish |
|
Clear Opening |
900×900 mm |
|
Frame Size |
1026×1026×100 mm |
|
Customization |
Custom logo available |
|
Applications |
Airport runways, military facilities, docks, ports, and areas subject to extreme wheel loads |
|
Features |
F900 extra-heavy load rating; large square clear opening; self-leveling structure; suitable for heavy-load infrastructure |

Sample and Custom Work
Samples can be provided before mass production. The sample lead time ranges from one week to one month, depending on your customization requirements. The minimum order quantity is 100 sets. A warranty is included, with the warranty period specified in the contract.
Flange Control Inside Our Factory
Our factory has a dedicated processing area for self-leveling structures. During production, our team controls the frame flange dimensions, support face, and embedment depth. These measures help the frame maintain a secure connection with the road surface and reduce the risk of sinking. Our team also checks the frame flatness and cover thickness of each batch to maintain dimensional consistency. These quality checks help ensure that each Self Leveling Ductile Iron Manhole Cover
meets the required specifications.
Questions Buyers Often Ask
Q: Does the cover help prevent sinking?
A: Yes. The self-leveling structure helps the frame stay securely seated against the road surface, reducing the risk of sinking.
Q: What is the clear opening size?
A: The clear opening measures 900×900 mm.
Q: What load rating does it have?
A: It has an F900 load rating.
Q: How long does a sample take?
A: The sample lead time is one week to one month, depending on your customization requirements.
If this product meets your project requirements, please contact us for more information. A dedicated sales representative and back-office staff member will handle your inquiry. We can help you select a suitable model and manage purchasing risks throughout the process.
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