PRODUCT
D400 Manhole Cover
Heavy Duty EN124 Load Rating for Road Use — D400 Rated FRP Composite Manhole Cover for Highways, Roads, and Industrial Pavements
Gallery
D400 Cover Installed on Roadway
Road Construction Installation
Product View 3
Product View 4
Product Overview
Engineered for Heavy-Duty Road Applications
The D400 manhole cover is designed and tested to meet EN124 D400 load classification, supporting a maximum load of 400 kN (approximately 40 tonnes). This makes it the ideal choice for roadways, highways, and heavy-traffic pavements where cast iron covers have traditionally been used but suffer from theft, corrosion, and high installation costs.
Manufactured from high-strength FRP (Fiber Reinforced Polymer) composite materials, our D400 covers offer a weight reduction of up to 70% compared to equivalent cast iron products. The lightweight nature simplifies handling, reduces transportation costs, and allows for faster installation without requiring heavy lifting equipment on site.
Each cover undergoes rigorous factory load testing to ensure consistent D400 performance. The non-conductive, corrosion-resistant FRP construction provides a service life exceeding 30 years in most environments, eliminating the need for regular maintenance or replacement associated with traditional metal covers.
Specifications
Ficha Técnica
Specifications Diagram
Dimensions
Please refer to the dimensional drawing for detailed measurements and installation clearances.
| Parameter | Value |
|---|---|
| Load Rating (EN124) | D400 — 400 kN (40 tonnes) |
| Material | FRP Composite (Glass Fiber + Polyester Resin) |
| Available Sizes (Clear Opening) | 600×600 mm, 750×750 mm, 800×800 mm, Ø600 mm, Ø800 mm |
| Cover Weight (600×600) | ~28 kg (vs 85 kg cast iron) |
| Frame Material | FRP Composite or Galvanized Steel Insert |
| Slip Resistance | Class C (R12) — Anti-Slip Surface |
| Service Temperature | -40°C to +80°C |
| Color | Standard Black (Custom RAL available) |
Features
Características y Ventajas
Key Features Overview
EN124 D400 Certified Load Capacity
Tested and certified to withstand 400 kN static load, fully compliant with EN124 D400 classification for roads, highways, and heavy traffic areas.
70% Lighter Than Cast Iron
At only 28 kg for a 600×600 cover, our D400 FRP cover weighs one-third of equivalent cast iron, reducing shipping costs and enabling one-person installation.
Corrosion & Chemical Resistant
FRP composite is impervious to road salts, de-icing chemicals, sewage gases, and acidic soils — no rust, spalling, or degradation over time.
Theft-Proof Design
Zero scrap value compared to cast iron eliminates theft incentive. Optional tamper-proof locking system provides additional security.
Anti-Slip Safety Surface
Class C (R12) slip-resistant surface pattern ensures pedestrian and vehicle safety even in wet or icy conditions.
30+ Year Service Life
UV-stabilized resin system ensures long-term durability in outdoor exposure. Zero maintenance required — fit and forget.
Applications
Where It's Installed
FRP Manhole Cover for Road Construction — Complete Guide
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