• Dynamic stability: The tripod support eliminates oscillating movements of the cover, preventing noise pollution and premature wear of the edges.
• Operational safety: The 90° locking system prevents accidental closing of the covers during inspection phases inside the chamber.
• Tamper protection: The rotating bolt with contrast spring ensures a tight closure, accessible only via a specific key.
• Structural installation: The shaped external flange allows for superior anchoring to the foundation, distributing loads optimally.
• Ease of inspection: The sequential opening of the half-covers reduces the physical effort required for opening over large clear spans.

The h638_191 manhole cover is ideally used in main road carriageways, parking areas, and lots for all types of vehicles. It is specifically indicated for access to underground inspection chambers dedicated to electrical, water, or telecommunication networks where a clear opening of 1000x1200 mm is required for the easy passage of operators and instrumentation. The robustness of the GJS-500-7 iron makes it suitable for urban contexts with high density of heavy traffic.

Choosing this model is correct when a large-sized cover is needed that maintains high security standards against unauthorized opening. The integration of the key locking system and closed-bottom hinges represents a fundamental prerequisite for the protection of critical underground services. The certified D400 configuration guarantees compliance with European regulations, offering a reliable solution to avoid the structural failures typical of manhole covers not suitable for heavy dynamic loads.

What is the function of the tripod system in this manhole cover?

The tripod system ensures that the cover always rests on three points within the frame, eliminating instability and metallic noises caused by passing vehicles, which are typical of traditional rectangular closures.

Is the product certified for heavy traffic?

Yes, the product belongs to class D400 according to the UNI EN 124 standard, which makes it suitable for vehicle transit on road carriageways, including hard shoulders and parking areas.

What does the sequential opening of the covers guarantee?

The sequential opening, coordinated by the master cover, ensures that the elements are moved according to a precise order, guaranteeing that the components remain attached to the frame via the hinges during use.