This D400 multileaf manhole cover and frame, with a 1060 × 700 mm clear opening, offers a robust, modular access solution engineered from premium ductile iron to meet demanding roadway environments. Its interconnected leaf design divides the cover into manageable sections, reducing individual lift weights while maintaining full Class D400 (400 kN) loading capability for heavy‑traffic applications. Precision machining ensures a flush, non‑rock seating with three‑point suspension and a slip‑resistant surface, all protected by a durable bitumen coating. Fully compliant with BS EN 124‑2:2015 and backed by third‑party certification, this assembly blends safety, serviceability, and longevity in one authoritative package.
Material & Modular Design
The cover and frame are cast from GGG500/7‑grade ductile iron, delivering an optimal strength‑to‑weight ratio and superior impact resistance under cyclic loads.
Its multileaf (three‑leaf) configuration breaks the 1060 × 700 mm opening into smaller, interlocking sections, facilitating safer lifting and handling compared to single‑piece covers.
Technical Specifications
| Specification | Details |
|---|---|
| Clear Opening | 1060 × 700 mm |
| External Frame Size | 1210 × 850 mm (L×W) |
| Frame Depth | 100 mm |
| Load Rating | D400 (400 kN / 40 t) |
| Total Assembly Weight | Approx. 60 kg |
| Suspension System | Three‑point for non‑rock stability |
| Surface Pattern | High USRV & PSRV slip‑resistant top pattern |
| Coating | Standard 30 µm bitumen; optional epoxy available |
Quality & Compliance
Manufactured and rigorously tested to BS EN 124‑2:2015 for Group 4 (D400) covers and gratings.
Each unit bears third‑party certification, demonstrating full compliance with UK and EU regulations and ensuring traceable quality control.
Unlike composite alternatives, this ductile iron assembly maintains dimensional stability and longevity in extreme traffic conditions.
Applications & Benefits
Ideal for carriageways, highways, airport aprons, industrial estates, and other high‑traffic zones that demand a 40 tonne load capacity.
The multileaf design and ergonomic three‑point suspension drastically reduce on‑site lifting effort, accelerating installation and maintenance while minimizing workforce strain.
A slip‑resistant surface pattern enhances pedestrian safety at crossings and edge zones, while the robust bitumen coating shields the assembly from corrosion, cutting lifecycle costs.
Backed by Highways England–approved specifications, this cover meets enhanced safety and design standards for national road networks.
| Family: | Telecom / Fibre / Cable |
| Packaging Qty: | 5 |
| Product Type: | Telecom Access Cover |
| Product Ranges: | TI Range |
| Certified Class: | D400 |
| Standards: | EN124 |
| Surface Finish: | ANTI-SLIP TI RAISED PATTERN |
| Clear Opening Length (Hinge Side): | 1060 mm |
| Clear Opening Width: | 700 mm |
| Flange Outer Length: | 1250 mm |
| Flange Outer Width: | 885 mm |
| Frame Height: | 100 mm |
| Weight: | 168 kg |
| Watertight: | No |
| Cover/Grating Shape: | Double Triangular |
| Cover/Grating Length: | 546 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 |
| Installation Type: | With Concrete |
| 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 |
