• Certified extreme load capacity: Class F900 allows the safe transit of aircraft, container handling vehicles and exceptional industrial vehicles without risk of failure.
• Active mechanical safety: The automatic snap-lock system keeps the cover secured to the frame, preventing accidental lifting due to vibrations or air depressions.
• Advanced airtightness: The integrated "U"-shaped seat, when filled with suitable materials, blocks the rise of gases and unpleasant odors, improving the healthiness of the surrounding environment.
• Installation stability: The continuous external flange and reinforcement ribs distribute the enormous vertical pressures evenly, preserving the integrity of the foundation.
• Ease of inspection: The sized external compartments allow opening via generic levers, while the closed-bottom slots protect lifting points from debris.

The use of the h638_140 manhole cover is mandatory in airports (runways and parking areas), port terminals and heavy industrial zones subject to extremely high axle loads. It is the ideal solution for covering technological manholes and sewer networks in large-scale logistics hubs, where operational continuity depends on the robustness of the road infrastructure. Its compliance with the EN 1563 standard also makes it suitable for heavy vehicle testing areas and port zones subject to corrosive atmospheres.

Choosing this product is the correct decision when it is necessary to guarantee the maximum degree of structural protection in critical environments. Thanks to the weight of 104 kg and the high-density ductile iron, it is preferable to standard models for its ability to withstand extreme and prolonged load cycles. It represents the optimal choice for designers who require a product certified ISO 9001:2015, capable of integrating stability, safety locking and protection against miasmas into a single trafficable element compliant with the strictest European regulations.

What is the actual load capacity of Class F900?

Class F900 guarantees resistance to a test load of 900 kN (equivalent to approximately 90 tons). It is the highest category provided for crowning devices, necessary for pavements subject to special loads from aircraft and port cranes.

What is meant by "Automatic locking"?

The cover has integrated elastic appendages that mechanically lock into the frame upon closing. This mechanism ensures that the manhole cover remains closed even under the effect of strong dynamic stresses, requiring the use of a specific lever for manual release.

Does the "U"-shaped seat require specific maintenance?

To maintain odor-tightness, it is necessary for the "U"-shaped seat to be constantly filled with sand or suitable grease. During periodic inspections, it is recommended to clean the groove of any coarse debris to always ensure a unique and precise insertion of the cover.