• Heavy Traffic Suitability: Certified to withstand 40 tons, it resists without deformation or structural failure the hammering effect caused by the continuous transit of trucks, buses, and special vehicles.
• Total Odor Reduction: The internal "U" groove allows for the creation of a continuous perimeter seal against the escape of unpleasant sewage gases, significantly improving healthiness in urban areas.
• Infallible Structural Anchoring: The perimeter flange with holes for anchor bolts and structural reinforcement ribs distribute loads evenly over the concrete, avoiding cracking of the surrounding road surface.
• Wide Inspection Access: The clear opening of 80x80 cm provides the necessary space for the safe lowering of operators equipped with tools or for the maintenance of underground hydraulic and technological nodes.
• Pedestrian and Vehicular Safety: The anti-slip geometric reliefs distributed on the surface favor the rapid drainage of rainwater and prevent skidding or slipping even in wet conditions.

The h638_171 model is the preferred solution for covering and inspecting technological chambers, utility services, and primary sewer pipes. It finds its perfect placement in high-traffic roads, industrial plant yards, logistics terminals, loading/unloading areas, public parking lots, and road shoulders.

Choosing this manhole cover means investing in a component of the highest engineering level. With a solid mass of 80 kg and the structural robustness of GJS-500-7 ductile iron, it offers extraordinary tolerance to repeated impacts and atmospheric corrosion compared to traditional grey iron. It is the perfect investment for municipalities, companies, and urban network managers who demand certified materials capable of eliminating costs related to extraordinary maintenance after installation.

What is meant by load class D400?

Class D400, defined by the UNI EN 124 standard, identifies gully tops and manhole tops suitable for installation on the carriageways of main roads, road shoulders, and parking areas accessible to all types of road vehicles, including heavy vehicles (test load exceeding 400 kN).

How is the odor seal configured with the "U" seat?

The frame features a "U" perimeter channel. By filling this space with fine sand or equivalent sealing materials before inserting the cover, a continuous blind joint is created that physically blocks the escape of gases and sewage fumes.

Is it possible to fix it mechanically to the base?

Yes, the frame is provided with pre-arranged holes for the use of anchor bolts, ensuring a solid and stable anchoring to the underlying concrete structure.

Do the closed-bottom slots allow rainwater to penetrate into the manhole?

No. The "closed-bottom" feature indicates that the cavity is isolated internally: it allows for the solid attachment of standard lifting tools but prevents dirt, debris, or rainwater from filtering into the chamber below.

Is it possible to request customization with the organization’s or company’s logo?

Yes, the cover has a special smooth central flat area, designed to host, upon request and for suitable order lots, the customized casting or engraving of brands, company logos, or identification labels of the utility service.