Engineered to endure extreme loads, the 600x600mm ductile iron manhole cover (D/Tri bolt design) delivers unmatched durability for high-traffic areas. Certified to EN124 D400 (40-ton load capacity), this 100mm-deep cover is ideal for highways, industrial parks, and logistics hubs, offering superior corrosion resistance and tamper-proof security.

Key Features

• Material: Grade 600-7 ductile iron with ≥93% iron, 3.4% carbon, and 2.5% silicon for 600 MPa tensile strength and 10% elongation.

• Design:

  • Triangular D/Tri Bolt System: Ensures even load distribution and prevents unauthorized access.

  • 100mm Deep Frame: Reinforced edges resist deformation under heavy axle loads (tested to 60-ton overload).

  • Anti-Slip Surface: Diamond-grid pattern (Ra ≥55μm) meets ISO 1344 safety standards.

• Protection:

  • Zinc-Aluminum Coating (200g/m²) + epoxy layer for coastal/chemical environments.

  • Optional V-Bio® Zinc for acidic soils (pH 3–11) or Arctic-grade coating (-50°C).

Technical Specifications

Applications

• Highways: Withstands 40-ton truck traffic (e.g., UK’s M25 motorway upgrades).

• Industrial Zones: Resists oil and chemical spills (compliant with ISO 12944 C5-M).

• Ports: Saltwater-resistant design extends lifespan by 40% vs. standard covers.

Why Choose This Cover?

✅ Superior Strength: 2.5x higher impact resistance than cast iron.
✅ Quick Installation: D/Tri bolts reduce assembly time by 25% (no specialized tools).
✅ Low Maintenance: 15-year warranty against cracks or coating failure.

FAQ

Q: Is it compatible with existing 600×600 frames?
A: Yes, designed for universal EN124-compliant frames.

Q: Can it handle heavy forklift traffic?
A: Absolutely. Tested to 40-ton dynamic loads in warehouse environments.

Q: Lead time for custom orders?
A: 4–6 weeks for >100 units. Stock available in EU and North America.

Case Study

Berlin’s Urban Renewal Project (2023): 500+ units installed in Tiergarten’s road network achieved 0 failures after 18 months of 35-ton daily traffic.