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D400 vs F900 Manhole Cover Mould Comparison
Understanding EN 124 load classes is crucial for municipal projects. This detailed comparison breaks down when to use D400 versus F900 moulds.
Load Class Overview
| Load Class | Max Load | Application | Typical Size |
|---|---|---|---|
| D400 | 40 tonnes | Municipal, highways, pedestrian areas | Ø 600-800 mm |
| F900 | 90 tonnes | Airports, heavy industrial, high-speed rail | Ø 800-900 mm |
Key Differences
- Concrete Volume: F900 requires 20-30% more concrete per cast
- Mould Weight: F900 moulds are 25-35% heavier
- Cycle Life: Both should achieve 300+ cycles with proper material
- Cost: F900 moulds cost 30-40% more due to material and design complexity
Selection Criteria
Choose D400 if:
- Urban municipal infrastructure
- Residential and light commercial areas
- Standard highway applications
- Budget constraints are a consideration
Choose F900 if:
- Airport runways and taxiways
- Industrial facilities with heavy forklift traffic
- High-speed railway platforms
- Projects requiring maximum load capacity
Zhihua Quality Assurance
All our D400 and F900 moulds are manufactured to EN 124 standards. Each mould undergoes:
- Dimensional inspection with CNC verification
- Sample pour test with load simulation
- Documentation compliance review
- Quality certification on delivery
Need Help with Load Class Selection?
Contact our engineering team for personalized recommendations based on your project specifications.