The Marmox Manhole Cover D-400

The Marmox Manhole Cover D-400

(166 ratings)
Made to order

The Marmox Manhole Cover D 400 is a heavy duty composite GRP manhole cover engineered to strictly satisfy European standard BS EN 124 Class D 400.

غطاء غرفة تفتيش مارموكس 40 طن

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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