Our D400 manhole cover is engineered to meet and exceed the BS EN124:2015 Class D400 standard, supporting heavy traffic loads up to 40 tonnes for roads, car parks, and housing estates. Featuring a drop‑in design with a 600 mm diameter round frame, it sits flush with surrounding surfaces to minimize trip hazards and streamline installation.
Key Features
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600 mm Round Drop‑In Design: Ideal for housing estates and car parks, this size balances load capacity with ease of access.
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High‑Grade Ductile Iron Construction: Manufactured from GGG500/7 ductile iron for superior strength and impact resistance.
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Anti‑Slip, Corrosion‑Resistant Surface: Chequered pattern tested beyond PSRV 70 by UKAS‑accredited third parties, with bitumen or epoxy coating to prevent rust and slipping in wet conditions.
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150 mm Frame Depth: Provides a stable, self‑aligning base and efficient load distribution into the substrate.
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Optional Locking & Sealing: Choose screw locks and a rubber gasket for tamper resistance and to keep out debris, odours, and standing water.
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Pressure‑Release Holes: Facilitate safe lifting under load, preventing sudden ejection of the cover during maintenance.
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Composite SMC Variant: Lightweight, UV‑resistant SMC covers comply with EN124‑5:2015 for situations where handling ease is critical.
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Custom Branding: Logos, color coatings, and bespoke anti‑theft features available on request to suit project requirements.
Technical Specifications
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Standard: BS EN124‑2:2015 (Class D400).
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Clear Opening: Ø 600 mm.
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Frame Outer: 785 × 785 mm (nominal).
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Frame Depth: 150 mm.
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Load Capacity: 400 kN (40 tonnes).
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Material: Ductile Iron (GGG500/7) or SMC Composite.
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Finish: Bitumen or Epoxy Paint; UV‑stable composite.
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Accessories: Screw locks, gasket seals, pressure vents.
Benefits for End Users
Durability and safety are paramount: this cover resists corrosion and deformation, ensuring over 30 years of reliable service in harsh environments. Its flush, chequered surface reduces slip risk, while third‑party BSI Kitemark certification guarantees consistent quality and performance.
Installation & Maintenance
The drop‑in format simplifies alignment and reduces labor time: simply set the frame into a prepared recess and insert the cover. Routine checks—tightening locks, clearing debris from vents, and inspecting the seal—are quick to perform, minimising downtime and maintenance costs.
Compliance & Quality Assurance
Fully compliant with EN124‑1:2015 and EN124‑2:2015 across Europe, our covers undergo rigorous load, slip, and fatigue testing. Approved by BSI and CE‑marked where applicable, they meet or exceed national highway specifications such as HA 104/09 in the UK.
| Family: | Municipal |
| Packaging Qty: | 10 |
| Product Type: | Access Covers |
| Certified Class: | D400 |
| Standards: | EN124 |
| Surface Finish: | Anti-slip surface |
| Clear Opening: | 600 mm |
| Flange Outer Diameter: | 850 mm |
| Frame Height: | 75 mm |
| Weight: | 45 kg |
| Watertight: | No |
| Cover/Grating Shape: | Round |
| Cover Diameter: | 650 mm |
| Hinged: | No |
| Opening Direction: | Sliding |
| Gasket Installed: | Yes |
| 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 |
| 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 |
