Product Overview
The 600×600 square SMC manhole cover is designed for underground utility systems, drainage networks, and municipal infrastructure applications. Manufactured from high-strength SMC composite material, the cover provides excellent corrosion resistance, anti-static properties, and stable long-term performance in outdoor environments. Available in EN124 C250 and D400 load classes.

Key Benefits
Large Square Access
- 600x600mm clear opening for utility and drainage chamber access
- EN124 C250 and D400 load ratings for versatile applications
- Long service life with low maintenance requirements
Composite Durability
- High-strength SMC composite provides corrosion and chemical resistance
- Anti-static and flame-retardant properties for safety
- Non-metal anti-theft design eliminates scrap value theft
Sealing Performance
- Waterproof sealing structure prevents leakage and water ingress
- Suitable for underground infrastructure systems
- Stable performance in outdoor environments
Real Customer Feedback
We used these 600×600 SMC covers for a large drainage network project. The square shape matched our existing chamber openings perfectly. The D400-rated units handle traffic loading without any issues. Installation was quick — one person can position each cover easily. No rust, no theft problems. Will specify again. – David H., Civil Contractor
Technical Specifications
- Clear Opening: 600x600mm
- Cover Size: 680x680mm
- Frame Size: 797mm
- Height: 99mm
- Material: SMC (Sheet Molding Compound) composite
- Load Classes: EN124 C250 and D400
- Shape: Square
Comparison Table
| Feature | 600×600 SMC Cover | Cast Iron Cover | Concrete Cover |
|---|---|---|---|
| Weight | Lightweight | 45-60kg | 55-75kg |
| Corrosion Resistance | Excellent | Poor | Moderate |
| Load Class Options | C250 / D400 | C250 / D400 | D400 |
| Theft Deterrence | High | Low | High |
FAQ
Can you provide OEM / ODM service?
Yes. OEM and ODM service are available. Custom logo, color, surface pattern, and dimensions can be produced according to project requirements.
What is your delivery time?
Normally, the production lead time is about 15–25 days depending on order quantity and product specifications.
What is the MOQ?
MOQ depends on the product size and specifications. Please contact us for detailed information.
What packaging method do you use?
The products are normally packed on export pallets for safer transportation and easier loading and unloading.
Do you provide warranty and after-sales service?
Yes. We provide one-year warranty service and technical support for our products. Please contact us for detailed after-sales information and project assistance.
Does the cover have waterproof sealing structure?
Yes. The cover is equipped with a sealing structure designed to help prevent leakage and water ingress.
Is this product suitable for heavy traffic areas?
Yes. The D400 version is suitable for heavy-duty traffic environments according to EN124 standards.
Is the material resistant to fuel and chemicals?
Yes. SMC composite material provides excellent corrosion and chemical resistance for underground fuel system applications.
Does the product include the frame?
Yes. The product includes both the manhole cover and frame.


















