The Marmox Manhole Cover C-250
The Marmox Manhole Cover C-250
The Marmox Manhole Cover C-250 is an advanced composite GRP manhole cover engineered to satisfy European standard BS EN 124 Class C-250.
Technical Property | Official Certified Value | Engineering Benefit |
Load Class | C-250 according to BS EN 124 | Certified to bear loads up to 250 kN (25 tons) |
Material Composition | Glass-Fiber Reinforced Polymer (Composite GRP) | High strength-to-weight ratio with superior mechanical durability |
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 cast iron |
Thermal & Electrical Insulation | Non-conductive and thermally stable | Ensures public safety across utility networks and roadways |
C-250 Marmox Manhole Cover
High Load Capacity: Engineered for kerbside channels, parking bays, and vehicular access zones.
Zero Scrap Value: Prevents theft and vandalism due to non-metallic composite composition.
Lightweight Handling: Reduces labor costs and injury risks during routine maintenance and inspection.
Odour & Noise Control: Precision-molded frame design seals odors and prevents rattling under traffic.
Weather & UV Resistance: Long-term resistance against harsh environmental factors and UV exposure.
Kerbside & Road Margins: Installed along side channels extending into carriageways and pavements.
Car Parks & Commercial Facilities: Suitable for parking decks, garages, and service access points.
Residential & Industrial Compounds: Underground drainage and storm-water collection networks.
Telecom & Electrical Chambers: Underground cable inspection pits requiring electrical insulation.
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 flush with the final road or paviour level.
Cover Seating: Place the cover into the frame, verifying proper seating and locking alignment.
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