F900 Strength for Extreme Loads
Airport runways and ports carry extremely heavy loads. The Heavy Duty Ductile Iron Manhole Cover is made for these applications. It has an F900 extra-heavy load rating. Ductile iron forms the main body, and asphalt paint coats the surface. It is suitable for applications with extreme load requirements.

Hinged, Tight, and Quiet
This heavy duty ductile iron manhole cover has a φ300 mm clear opening. The frame diameter is φ402 mm, and the frame height is 80 mm. A hinge connects the cover to the frame and helps prevent the cover from being lost. The cover fits securely in the frame and helps reduce noise under heavy loads. The surface is slip resistant and provides resistance to oxidation and weathering. Maintenance requirements are very low. Custom logos are available. The product is designed according to BSEN124. It can be used on airport runways, cargo docks, ports, and other areas with extreme load requirements. Buyers looking for an F900 load-rated cover can select this model.

Numbers You Can Check
Every key figure is listed in the table below. Use these specifications to select the right model.
|
Item |
Details |
|
Load rating |
F900 extra heavy |
|
Material |
Ductile iron; asphalt paint |
|
Clear opening |
φ300 mm |
|
Frame |
φ402 mm, frame height 80 mm |
|
Hinge |
Yes; custom logo; meets BSEN124 |
|
Use |
Airport runways, cargo docks, ports, extreme load areas |
|
Features |
F900 extra-heavy load rating; hinged structure helps prevent cover loss; secure fit helps reduce noise under heavy loads; slip resistant; oxidation and weather resistant; very low maintenance |

Custom Work We Accept
Your technical drawing can be used for customized production, and your prototype can also be used as a production reference. The minimum order quantity is 100 sets. A sample can be sent before mass production. Sample lead time ranges from one week to one month, depending on the customization requirements. Discounts are available for large orders, and the discount rate can be discussed according to the order quantity. A warranty is provided for this product, with the warranty period specified in the contract.
How We Hold Quality
A hinge assembly area is located inside our factory. Workers install the hinges and check the hinge gaps, cover opening angles, and anti-jump structures. These inspections help ensure that the cover remains stable under heavy loads. They also help reduce noise and vibration during use.
Questions Buyers Often Ask
Q: Do large orders get a discount?
A: Yes. Discounts are available for large orders, and the rate can be discussed according to the order quantity.
Q: Does the cover move under heavy load?
A: No. The cover is designed to remain stable under heavy loads.
Q: What is the top load grade?
A: F900 is the top load grade.
Q: Can a sample be sent before I order?
A: Yes. A sample can be sent before mass production.
If this Heavy Duty Ductile Iron Manhole Cover fits your project, contact us. A salesperson and a back-office worker will communicate with you directly. We can help you select the appropriate model and manage purchasing risks.
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