• Total blocking of accidental openings: The system with an integrated elastic lever automatically hooks onto the frame during closure, eliminating the risks of tampering or lifting caused by passing vehicles.
• Hermetic seal against underground gases: The internal "U" channel allows for the application of fine sand or insulating gels, preventing the rise of miasmas and preserving the olfactory decorum of the surrounding environment.
• High installation stability: The reinforcement ribs and the shaped perimeter flange allow for perfect embedding in concrete, preventing cracking of the surrounding road surface.
• Road grip in all conditions: The non-slip patterns uniformly distributed on the lid increase the grip of tires and pedestrian footwear, facilitating the lateral runoff of rainwater.
• Maximum clear opening: The useful opening of 90x90 cm allows technicians to move and introduce bulky equipment into the manholes without physical obstacles.

This ductile iron manhole cover is primarily intended for contexts of urban traffic and distribution infrastructure. It finds its ideal location in city streets, public parking lots, rest areas, and roadside guttering affected by the continuous transit of cars and medium commercial vans. It is the required component for the protection and access to large inspection chambers for sewer networks, electrical distribution systems, or main telecommunication nodes.

Choosing the h638_157 model is the correct decision when operational requirements dictate a large access section combined with the security guarantees of class C250 according to the EN 124 standard. It represents the ideal investment for entities that want to eliminate risks related to vibrations and misalignment of traditional square covers, thanks to the anti-dislodgement system combined with the snap closure. The 103 kg ductile iron structure offers mechanical flexibility and impact resistance significantly superior to gray iron, ensuring that the product does not crack under the effect of repeated dynamic loads.

Does class C250 allow the installation of this manhole cover in the center of highway lanes?

No, class C250 is indicated for urban roads, parking lots, and lateral flow zones or shoulders. For highway lanes or ordinary roads with high heavy vehicle traffic, regulations require the use of higher-class devices, such as D400.

What does the anti-dislodgement interlocking between the frame and the square lid consist of?

It is a geometric configuration of the coupling seats that prevents the lid from moving horizontally or sliding out of its seat under the action of braking and acceleration forces from vehicles, keeping the manhole cover always perfectly flush with the ground.

Is it possible to request customization of the lid surface?

Yes, the lid design includes specific structured planar areas to allow for personalized engraving or casting of institutional logos, company brands, or identification codes for the type of underlying technological system.