The D400 ductile iron manhole cover for road surfaces h638_155 is a professional covering device designed for infrastructural contexts subject to constant dynamic stress. Manufactured from high tensile strength ductile iron by a company with an ISO 9001:2015 certified management system, this product solves the problem of structural failure and rocking typical of traditional manhole covers under heavy traffic. The target audience includes public authorities, construction companies, and technological network designers operating on road arteries, logistics yards, and commercial parking lots. The structure features a square frame provided with a continuous peripheral flange and reinforcement ribs for perfect anchoring to the concrete foundation, associated with an internal "U" seat that guarantees an airtight seal against the rise of sewer miasmas and odors in urban centers.
Technical characteristics
External frame dimensions: 500 x 500 mm
Internal clear opening: 400 x 400 mm
Profile height: 75 mm
Net weight: 26.5 kg
Load class: D400 (compliant with European standard EN 124, for loads up to 40 tons)
Material: High-elasticity ductile iron
Geometry: Square-shaped frame and cover with rounded corners
Cover details: Maximum interlocking depth, closed slots for lifting keys, and anti-slip reliefs
Customization: Smooth surface area dedicated to the engraving of logos or text of the contracting authority
System certification: ISO 9001:2015
* Image purely indicative
User Benefits
Permanent structural integrity: Compliance with class D400 certifies the capacity to support loads up to 40 tons, preventing cracks or breakages even under the continuous transit of heavy vehicles.
Containment of sewer fumes: The internal "U" groove acts as a sealing barrier against underground gases when coupled with sand or insulating materials, preserving the healthiness of the surrounding environment.
Immediate plant identification: The smooth space on the cover allows for customized casting of logos and text, facilitating the traceability of networks belonging to public entities or service companies.
Optimal grip and drainage: The geometric reliefs uniformly distributed on the surface prevent vehicles and pedestrians from slipping, while simultaneously channeling rainwater towards the external flow channels.
Silent interlocking stability: The combination of rounded corners and maximum seating depth eliminates horizontal movements of the cover, reducing noise pollution caused by passing wheels.
Scope of Application
This manhole cover finds its natural application in modern road infrastructures and in primary urbanization projects with high intensity of use. It is specifically indicated for covering water, sewage, or cable duct inspection pits located on urban and extra-urban roads, emergency lanes, public parking lots, and industrial yards. Its technical configuration also allows it to be installed in areas of frequent maneuvering by commercial vehicles, such as gas stations and logistics loading docks.
Why Choose It
Choosing the h638_155 model is correct when a compact square closing device (50x50 cm) is needed that does not compromise in terms of resistance to heavy loads. It represents the ideal investment compared to traditional grey iron because the ductile matrix of the material ensures flexibility and shock tolerance without cracking. It is the definitive technical solution for construction installers who require a self-centering slotted frame capable of speeding up installation operations and ensuring a permanent structural connection with the asphalt or concrete road surface.
FAQ
Is the D400 load class suitable for installation on highways?
Yes, the D400 class is certified according to the EN 124 standard to withstand loads up to 40 tons and is the required standard for installation on high-traffic roads, including travel lanes and highway rest areas.
How is the odor seal achieved through the internal "U" seat?
To activate the anti-odor function, the "U" seat of the frame must be filled with fine sand or insulating gels before inserting the cover; the geometric compression creates an airtight joint that blocks the escape of gases from the pit.
What is the function of the closed-bottom slots on the cover?
The slots are used for the secure attachment of lifting keys during inspection. Being closed-bottom, they prevent liquids, dust, and small road debris from penetrating inside the sewer compartment, protecting the underlying systems.
Holity uses PayPal and credit transfer as methods of payment.
Credit Transfer
Paying by credit transfer the order will be handled only after a bank credit receiving confirmation. Payment must be made within 7 days from date of order. Go past the deadline, the order will be automatically canceled. The bank transfer purpose must necessarily bring the order number, the order date and client name. The products availability has to be judged only from the credited. The payment must 'be made payable to: ' NAMITI SRL '
PayPal
Selecting the type of PayPal payment, you will be redirected to a page on the PayPal site where in you can enter with your email address and password and make payment. Your financial data will not be shared with Holity but they will be handled directly by PayPal. In case of order cancellation or rejection by Holity, the amount will be refunded to your PayPal account and Holity will be not responsible for delays and / or damage during repayment.
Upon delivery of the goods the customer is required to inspect:
The number of packages delivered is as indicated in the transport document
The packaging is intact and not altered even in the closing strip
In case of tampering and / or breaks the customer will immediately challenge the shipment and / or delivery putting the word "SUBJECT TO INSPECTION FOR GOODS ....." (give reasons) on the delivery receipt from the courier.
The customer then must report any damage within 7 (seven) days of receipt of goods in the manner prescribed by the operator chosen for the expedition. In case the customer fails to collect within 2 (two) working days of the goods ordered and present in storage at the warehouses of courier and / or the Company due to the repeated inability to deliver to the address specified by the customer with the order, will return the goods to stores in Namiti Ltd., with charge to the account of charges for transport and storage of goods, the customer may request a new shipment of the goods, upon payment of these expenses and the new shipping cost.
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