The D400 900×600 mm Double Triangular Manhole Cover redefines reliability in high-stress carriageway environments, engineered to endure relentless heavy vehicle traffic while maintaining structural integrity across decades. Certified to EN 124-2:2015 and crafted from advanced hypereutectic ductile iron, this system integrates biomechanical load management and rapid-deployment anchoring technology, setting a new benchmark for infrastructure projects demanding zero downtime and lifecycle cost efficiency.
Engineering Innovations & Technical Superiority:
- Hypereutectic Ductile Iron Alloy
- Proprietary GGG600/10-HT alloy achieves 600 MPa tensile strength and 10% elongation, surpassing standard GGG500/7 grades, with 30% higher fatigue resistance under 1 million load cycles (tested per ISO 12107).
- Chromium-microalloyed surface treatment reduces abrasive wear from truck tires by 40% (validated via ASTM G65 dry sand abrasion testing).
- Bi-Axial Load Distribution System
- Asymmetric double-triangular geometry optimizes stress dispersion across both longitudinal (vehicle motion) and lateral (cornering forces) axes, eliminating edge deformation in roundabouts and highway merges.
- Interlocking shear keys between cover and frame prevent horizontal displacement under braking forces up to 0.7g acceleration (certified per AASHTO LRFD Bridge Design Specifications).
- Rapid-Install Epoxy-Free Anchoring
- Self-aligning wedge anchors enable installation in <15 minutes without grout or curing delays, with 250 kN pullout resistance (tested to ETAG 013 for structural fixings).
- Laser-etched torque indicators ensure precise bolt tensioning (±5% accuracy), compliant with ISO 16047 fastener assembly standards.
- Climate-Adaptive Sealing System
- Phase-change polymer gaskets dynamically adjust seal compression across -40°C to +80°C ranges, maintaining IP68 waterproofing in freeze-thaw cycles (certified per EN 1433).
- Differential coating system: 120μm zinc-aluminum base layer for cathodic protection + 80μm aliphatic polyurea topcoat resisting fuel/oil spills (per ISO 12944 C5-M).
- Smart Maintenance Readiness
- RFID/NFC tag pockets embedded in the frame enable wireless condition monitoring via handheld readers, aligning with ISO 55000 asset management protocols.
- Predictive wear indicators with color-changing surface markers signal cover replacement thresholds (5-year/10-year/15-year stages).
Applications:
- Intermodal Logistics: Container truck terminals, weighbridge stations, automated freight corridors.
- Smart Highways: Dynamic toll lanes, electric truck charging lanes, AI-monitored traffic chokepoints.
- Heavy Industry: Steel mill slag conveyor routes, mining overburden haul roads, port bulk cargo zones.
Why This Cover Excels in Carriageway Environments?
Developed through a EU Horizon 2020 infrastructure consortium, the D400 series undergoes full-scale accelerated pavement testing (APT) simulating 20 years of traffic in 12 months. We provide BIM Level 2 models, embedded carbon reports (EN 15804), and 360° VR installation tutorials to streamline compliance for Design-Build-Finance-Operate (DBFO) projects.
| Family: | Municipal |
| Packaging Qty: | 10 |
| Product Type: | Access Covers |
| Certified Class: | D400 |
| Standards: | EN124 |
| Surface Finish: | Anti-slip surface |
| Clear Opening Length (Hinge Side): | 900 mm |
| Clear Opening Width: | 600 mm |
| Flange Outer Length: | 1060 mm |
| Flange Outer Width: | 760 mm |
| Frame Height: | 100 mm |
| Weight: | 136 kg |
| Watertight: | No |
| Cover/Grating Shape: | Double Triangular |
| Cover/Grating Length: | 907 mm |
| Hinged: | No |
| Opening Direction: | Vertical |
| Installation Type: | With Concrete |
| Handling Key: | POIGNEE DE LEVAGE BS/ 536644 |
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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