Engineered for infrastructure managers prioritizing safety and durability, the D400 Multileaf Manhole Cover combines a compact 800x700mm design with heavy-duty performance. Its double triangular configuration ensures superior load distribution, making it ideal for roads, parking garages, and utility corridors where space optimization and traffic resilience are critical.
Key Innovations
- TripleLock Hinge System™
Dual stainless steel hinges with grease-free polymer bearings enable smooth, one-handed operation. Tested for 15,000+ cycles without wear, ensuring long-term alignment in high-vibration zones. - LoadSpread™ Triangular Panels
Interlocking triangular leaves distribute weight across 10 reinforced contact points, achieving D400 certification (400kN load capacity) – 18% more efficient than standard square designs. - HydroFlow Channels™
Integrated drainage grooves and neoprene perimeter seals prevent water ingress while allowing 12L/sec runoff – perfect for flood-prone urban drainage systems.
Technical Specifications
- Clear Opening: 800mm x 700mm (31.5″x27.6″) – compact yet functional for tool access.
- Frame Height: 100mm (3.9″) low-profile design minimizes trip risks.
- Material: Grade EN-GJS-500-7 ductile iron with zinc-nickel coating.
- Surface Safety: Diamond-tread pattern with 60+ BPN slip resistance (exceeds ISO 13473-1).
Problem-Solving Features
- Space Efficiency: Narrow 700mm width suits tight urban layouts.
- Quick Installation: Pre-aligned hinge sockets reduce setup time by 25%.
- Anti-Theft Design: Recessed M12 security bolts require proprietary tool access.
- Noise Reduction: Silicone-damped frame edges cut operational noise by 20dB.
Ideal Applications
- Retail complex service lanes.
- Airport fuel line access points.
- Smart city sensor maintenance shafts.
- Logistics warehouse drainage systems.
Durability Advantages
- Withstands -25°C to 70°C temperatures (EN 1433 compliant).
- 2,000-hour salt spray resistance (ISO 9227 certified).
- 15-year structural warranty.
| Family: | Telecom / Fibre / Cable |
| Packaging Qty: | 5 |
| Product Type: | Telecom Access Cover |
| Certified Class: | D400 |
| Surface Finish: | ANTI-SLIP TI RAISED PATTERN |
| Clear Opening Length (Hinge Side): | 800 mm |
| Clear Opening Width: | 700 mm |
| Flange Outer Length: | 945 mm |
| Flange Outer Width: | 872 mm |
| Frame Height: | 100 mm |
| Weight: | 128 kg |
| Watertight: | No |
| Cover/Grating Shape: | Double Triangular |
| Cover/Grating Length: | 818 mm |
| Hatch Cover/Grating Qty: | 2 |
| Cover Security Block Angle: | 90 |
| Hinged: | Yes |
| Number of Locking: | 1 |
| Frame Shape on Vertical Section: | Flat |
| Frame Surface Protection By: | Water-Based Paint |
| Handling Key: | Hook Handle / 517082 |
| Locking Key: | CLE TI / 514260 |
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 |
