The Marmox Manhole Cover D-400
Technical Property | Official Certified Value | Engineering Benefit |
Load Class | D-400 according to BS EN 124 | Certified to bear extreme vehicular loads up to 400 kN (40 tons) |
Material Composition | Glass-Fiber Reinforced Polymer (Composite GRP) | High strength-to-weight ratio with superior structural integrity |
Chemical Resistance | Immune to H2S gas, acids, alkalis, and salts | Zero corrosion and degradation in aggressive sewage environments |
Anti-Theft Property | Non-recyclable composite material | Completely eliminates theft risk associated with scrap metals |
Thermal & Electrical Insulation | Non-conductive and thermally stable | Ensures public safety across heavy traffic roadways and utilities |
Marmox Manhole Cover D-400
Extreme Load Capacity: Engineered specifically for main roads, highways, and heavy commercial vehicle access zones.
Zero Scrap Value: Prevents theft and vandalism due to non-metallic composite composition.
Lightweight Handling: Reduces handling labor and safety hazards during routine maintenance and inspection.
Odour & Noise Control: Precision-molded frame design seals odors and prevents rattling under heavy traffic.
Weather & UV Resistance: Long-term durability against harsh environmental conditions, heat, and UV exposure.
Carriageways & Main Roads: Installed in traffic lanes of main city streets, highways, and hard shoulders.
Industrial Facilities & Logistics Hubs: Heavy-duty access points for factory yards, warehouses, and ports.
Petrol Stations & Service Areas: Underground fuel tank chambers and utility manholes requiring explosion-proof qualities.
Municipal Infrastructure: Main sewage trunks, storm-water drainage networks, and heavy electrical chambers.
Chamber Neck Preparation: Ensure the concrete chamber head is clean, structurally sound, and level.
Bedding Mortar: Apply a uniform layer of non-shrink high-strength bedding mortar over the chamber top.
Frame Alignment: Set the composite frame firmly into the mortar, aligning it perfectly flush with the final asphalt road level.
Cover Seating: Place the cover into the frame, verifying proper seating to avoid movement under high-speed traffic.
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