The D400 Double Triangular Manhole Cover with 600×600 mm Round Opening revolutionizes heavy-duty access solutions by merging biomimetic engineering and aerospace-grade materials to address the unique challenges of high-velocity traffic and seismic activity. Certified to EN 124-2:2015, this system redefines load management through a proprietary hexagonal-triangular lattice structure, optimized for dynamic forces in environments ranging from Formula 1 racetracks to earthquake-prone urban corridors.
Pioneering Innovations & Technical Mastery:
- Biomimetic Hexagonal-Triangular Hybrid Matrix
- Inspired by tortoise shell biomechanics, the dual-layer lattice design achieves 62% higher energy absorption under impact loads compared to conventional triangular patterns (validated via ANSYS Explicit Dynamics simulations).
- Radial stress dispersion from the round opening eliminates edge cracking risks, critical for high-torsion applications like rotary intersections or automated vehicle test tracks.
- Aerospace-Derived Material Science
- GGG700/12 titanium-reinforced ductile iron (700 MPa tensile strength, 12% elongation) incorporates TiB2 nanoparticles to reduce wear rates by 55% under abrasive loads (tested per ASTM G133).
- Self-healing poly(urea-formaldehyde) coating autonomously repairs scratches ≤1.5 mm depth using ambient moisture, maintaining ISO 12944 C6 corrosion resistance in coastal/industrial environments.
- Hyperbolic Frame-to-Cover Interface
- Conic-section frame geometry ensures zero gap tolerance (±0.2 mm) even under ±15° angular misalignment, preventing water ingress in flood zones or liquefaction-prone soils.
- Magnetorheological elastomer seals stiffen dynamically under vibration (up to 200 Hz), achieving 100% watertightness during earthquakes or heavy truck convoys (certified per IEEE 693-2022).
- Zero-Maintenance Smart Integration
- Triboelectric nanogenerator (TENG) sensors embedded in the frame harvest kinetic energy from traffic to power wireless load monitoring (LoRa 2.4 GHz transmission).
- Quantum-dot surface markers enable LiDAR-assisted autonomous vehicle navigation with <2 cm positional accuracy, compliant with SAE J3016 Level 4 autonomy standards.
- Extreme Environment Readiness
- Cryogenic treatment (-196°C liquid nitrogen immersion) enhances dislocation density for 25% improved fatigue life in Arctic infrastructure (validated via ASTM E466).
- Electromagnetic pulse (EMP) shielding integrated into the alloy matrix protects IoT components from 100 kV/m transient surges (per MIL-STD-461G).
Applications:
- High-Velocity Transport: Hyperloop maintenance shafts, maglev track access points, autonomous freight drone hubs.
- Disaster Resilience: Tsunami evacuation route drainage, volcano monitoring station utilities, fault line utility corridors.
- Aerospace Infrastructure: Spaceport fuel line access, rocket vibration test bed drainage, satellite launchpad safety systems.
Why This System Redefines Industry Standards?
Co-engineered with biomechanics research institutes and aerospace metallurgists, the D400 series undergoes hypersonic particle impact testing (Mach 5 simulations) and computational topology optimization. We provide AI-driven lifecycle prognostics (Digital Twin Consortium compliant) and exoskeleton-assisted installation rigs to reduce onsite labor risks by 70%.
| Family: | Municipal |
| Packaging Qty: | 5 |
| Product Type: | Access Covers |
| Certified Class: | D400 |
| Surface Finish: | ANTI-SLIP OTHER SURFACE |
| Clear Opening Length (Hinge Side): | 600 mm |
| Clear Opening Width: | 600 mm |
| Flange Outer Length: | 750 mm |
| Flange Outer Width: | 750 mm |
| Frame Height: | 150 mm |
| Weight: | 77 kg |
| Watertight: | No |
| Cover/Grating Length: | 600 mm |
| Hinged: | No |
| Handling Key: | CLE BA1 BS / 511793 |
Ductile iron manhole cover specifications and parameters
| Parameter | Specification/Value |
|---|---|
| Material | Ductile Cast Iron (Grade 500-7) |
| Standard Compliance | EN 124, BS 497, ASTM A536, ISO 1083 |
| Shape | Round, Square, Oval |
| Load Rating | A15, B125, C250, D400, E600, F900 (EN 124 load classes) |
| Load Bearing Capacity | 1.5 – 90 tons (depending on the rating) |
| Size (Diameter/Length) | 300mm – 1500mm (depending on type and design) |
| Thickness of Lid | 20mm – 60mm (depending on the load class) |
| Weight | 10 kg to 150 kg (depending on size and class) |
| Cover Surface | Smooth, Anti-slip, Textured for grip |
| Corrosion Resistance | Excellent, with epoxy coatings or bituminous treatment |
| Gasket Type | Rubber, Neoprene, EPDM |
| Sealing Mechanism | Bolt-down, Locking system, Hinged |
| Drainage Holes | Yes, optional (for water drainage) |
| Coating Type | Bitumen coated, Epoxy coating, Hot-dip galvanizing |
| Temperature Resistance | -30°C to +150°C (depending on coating type) |
| Fire Resistance | Flame-retardant (meets local standards for fire resistance) |
| Noise Level | Low noise design for urban areas |
| Ventilation | Optional vented covers for gas or sewage systems |
| Color | Black, Gray, Custom colors available |
| Manufacturing Process | Sand casting, Lost wax casting, Centrifugal casting |
| Edge Type | Flat, Raised, Beveled, or Reinforced edges |
| Bearing Surface | Cast iron, Epoxy, Stainless Steel (optional) |
| Longevity | 50+ years with proper maintenance |
| Environmental Compliance | RoHS, REACH, and other regional environmental standards |
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