Designed for municipal engineers and infrastructure planners, the D400 Multileaf Manhole Cover delivers unmatched durability in high-traffic environments. Its compact 1200x600mm double triangular configuration ensures optimal load distribution, making it perfect for urban roads, industrial parks, and pedestrian-heavy zones where space efficiency matters.
Key Innovations
- Dual-Triangle Reinforcement System
Two interlocking triangular leaves distribute weight across 8 strategic contact points, achieving D400 certification (400kN load capacity). Withstands daily traffic from delivery trucks and municipal service vehicles. - SwiftHinge™ Technology
Corrosion-resistant stainless steel hinges with self-lubricating bearings enable smooth one-handed operation. Tested for 20,000+ cycles with zero sagging or misalignment. - DrainSmart Seal Matrix
Triple-layer EPDM gaskets + perimeter drainage grooves prevent debris buildup while allowing 15L/second water flow—ideal for storm-prone regions.
Technical Specifications
- Clear Opening: 1200mm x 600mm (47.2″x23.6″) – compact yet spacious for tool access.
- Frame Height: 100mm (3.9″) low-profile design reduces trip hazards.
- Material: Grade 600-3 ductile iron with zinc-aluminum coating.
- Surface Safety: Laser-etched anti-slip pattern (58 BPN rating, exceeds ISO 13473-1).
Problem-Solving Benefits
- Space-Saving Design: Narrow 600mm width fits constrained urban layouts.
- Quick Installation: Pre-assembled hinge units cut labor time by 30%.
- Vandal Resistance: Tamper-proof M16 locking bolts (keys sold separately).
- Quiet Operation: Noise-dampening rubber frame inserts reduce clatter by 22dB.
Ideal Use Cases
- City center pedestrian crossings.
- Warehouse loading bay drainage.
- Public transport lane cable access.
- Solar farm maintenance shafts.
Durability Features
- Survives -30°C winters to 60°C summers (EN 1433 compliant).
- 1,500-hour salt spray resistance (ISO 9227 certified).
- 20-year structural warranty.
| Family: | Telecom / Fibre / Cable |
| Packaging Qty: | 5 |
| Product Type: | Telecom Access Cover |
| Certified Class: | D400 |
| Standards: | EN124 |
| Surface Finish: | Anti-slip surface |
| Clear Opening Length (Hinge Side): | 1200 mm |
| Clear Opening Width: | 600 mm |
| Flange Outer Length: | 1395 mm |
| Flange Outer Width: | 785 mm |
| Frame Height: | 100 mm |
| Weight: | 154 kg |
| Watertight: | No |
| Cover/Grating Shape: | Double Triangular |
| Cover/Grating Length: | 620 mm |
| Hatch Cover/Grating Qty: | 4 |
| Cover Security Block Angle: | 90 |
| Hinged: | Yes |
| Hinge Type: | TI |
| Lock Type: | 1/4 Turnbuckle |
| Number of Locking: | 1 |
| Opening Direction: | Vertical |
| Frame Style: | Monoblock as Cast |
| Frame Shape on Vertical Section: | Flat |
| Frame Surface Protection By: | Water-Based Paint |
| Nb Anchoring Hole: | 4 |
| Installation Type: | With Concrete |
| Diameter Anchoring hole: | 20 mm |
| 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 |
