• Tripod Stability: The three-point support of the triangular lids naturally eliminates oscillating movements (rocking), reducing mechanical wear and noise pollution during vehicle passage.
• Sequential Safety: The locking plate on the slave lid prevents accidental or unauthorized opening, forcing the operator to first act on the master lid lock.
• Handling Ergonomics: The division into two triangular lids halves the lifting effort for the operator; furthermore, the hinges with locks ensure that the manhole cover remains safely open during inspections.
• Structural Anchoring: The wide slotted perimeter flange allows for solid fastening with anchor bolts, preventing cracking of the surrounding road surface due to dynamic stresses.
• Mechanical Protection: The rotating bolt is protected by a recessed cap, preventing the accumulation of debris and asphalt that could compromise the closing mechanism.

The h638_101 manhole cover is specifically designed for installation in high-traffic roadways, shoulders, parking areas for heavy vehicles, and pedestrian zones. Thanks to its rectangular clear opening (400x760 mm), it is the ideal solution for inspection chambers of technological networks (telecommunications, electricity) and sewage systems that require wide, safe access and certified load capacity for loads up to 40 tons.

Choosing this model means investing in a technologically superior product, where the triangular geometry solves the problem of road noise caused by unstable manhole covers at its root. The ductile iron construction and the bolted lock system with contrast spring ensure a decades-long lifespan even under constant mechanical stress. It is the correct choice for administrations and companies that must guarantee maximum road safety and minimize post-installation maintenance costs.

What is meant by "sequential opening"?

It means that the lids are mechanically connected: the slave lid cannot be opened unless the master lid is first unlocked and lifted. This system increases security against tampering attempts or accidental openings.

Are the lids removable to facilitate cleaning?

Yes, the hinge appendages are designed to ensure safe articulation during normal use, but allow for the complete removal of the semi-lids once the correct angle is reached, facilitating maintenance of the manhole chamber.

Is it possible to insert the logo of the Municipality or the managing body?

Certainly. A specific smooth space is provided on the lid for inserting custom text or logos (e.g., Contracting Authority, Aqueduct, Sewerage), allowing for easy identification of the underlying network.