The D400 manhole cover with a double triangular design and a 900 × 900 mm clear opening is engineered to withstand extreme traffic loads, up to 400 kN (40 tonnes). This cover is a perfect choice for areas subjected to heavy vehicular traffic, including highways, industrial zones, airports, and freight terminals. Built to BS EN 124:2015 standards, this high-performance cover features a robust double triangular pattern that optimizes load distribution and enhances structural strength.
Manufactured from GGG500/7 ductile iron, known for its superior impact and fatigue resistance, this cover is designed to endure the toughest environmental and mechanical stresses. The cover’s double triangular configuration not only provides increased strength but also ensures a secure, flush fit, minimizing the risk of movement or rattling under heavy traffic. Additionally, a corrosion-resistant coating, typically in bitumen or optional epoxy finish, protects the cover from environmental degradation, extending its service life and reducing maintenance requirements.
Product Overview
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Double Triangular Design: The innovative double triangular pattern distributes weight evenly, improving the cover’s structural integrity while also facilitating secure handling and installation.
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Heavy-Duty Load Capacity: Rated to withstand up to 400 kN (40 tonnes) of load, this cover is ideal for high-traffic areas where heavy vehicles are routinely passing.
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Ductile Iron Construction: Made from GGG500/7 ductile iron, offering exceptional strength, fatigue resistance, and durability under harsh conditions.
Key Specifications
| Specification | Details |
|---|---|
| Clear Opening | 900 × 900 mm |
| Cover Type | Double Triangular Design |
| Load Rating | D400 (400 kN / 40 t) |
| Material | GGG500/7 Ductile Iron (ISO 1083) |
| Frame Size | Approx. 1050 × 1050 × 100 mm |
| Coating | 30 µm bitumen (standard); epoxy finish optional |
| Lifting Mechanism | Integrated lifting points for easy handling |
| Surface Pattern | Anti-slip triangular grid pattern |
Technical Features
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Superior Load Distribution: The double triangular cover design optimizes load transfer, ensuring a high level of performance under intense vehicular loads.
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Durable Construction: Cast from GGG500/7-grade ductile iron, the cover provides outstanding impact resistance, tensile strength, and long-term fatigue performance.
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Three-Point Suspension: The cover is designed with a three-point suspension system to ensure stability, reduce shifting, and maintain a flush fit even under high traffic volumes.
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Corrosion Resistance: Coated with a protective 30 µm bitumen or optional epoxy finish, the cover resists rust and wear, ideal for environments with high moisture or chemical exposure.
Quality & Compliance
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BS EN 124:2015 Compliance: Manufactured to meet D400 load class requirements, ensuring compliance with international safety and performance standards for manhole covers and gratings.
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ISO 9001 Certified: The product is manufactured under ISO 9001 quality management standards, guaranteeing high-quality consistency and reliability.
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Third-Party Testing: The cover undergoes independent testing to confirm it meets or exceeds the necessary load-bearing and safety specifications.
Applications & Benefits
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Ideal for High-Traffic Zones: Perfect for highways, urban streets, industrial zones, airports, and other locations where heavy vehicle traffic is a constant.
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Enhanced Safety: The anti-slip triangular grid surface provides excellent grip for pedestrians, reducing the risk of slips and falls.
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Long-Term Durability: The GGG500/7 ductile iron and corrosion-resistant coating ensure that this manhole cover will withstand decades of use with minimal maintenance.
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Reduced Maintenance Needs: The combination of durable materials and a secure fit minimizes the need for frequent inspections and replacements, making it a cost-effective solution for high-traffic areas.
| Family: | Telecom / Fibre / Cable |
| Packaging Qty: | 5 |
| Product Type: | Telecom Access Cover |
| Product Ranges: | TI Range |
| Certified Class: | D400 |
| Surface Finish: | Anti-slip surface |
| Clear Opening Length (Hinge Side): | 900 mm |
| Clear Opening Width: | 900 mm |
| Flange Outer Length: | 1100 mm |
| Flange Outer Width: | 1084 mm |
| Frame Height: | 150 mm |
| Weight: | 200 kg |
| Watertight: | No |
| Cover/Grating Length: | 953 mm |
| Hinged: | Yes |
| Handling Key: | Hook Handle / 517082 |
| Locking Key: | N/A |
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 |
