June 30, 2025
When choosing a manhole cover, balancing cost, durability, and the intended application is key. Both medium‑duty and heavy‑duty covers are rated for H‑20 traffic—supporting up to 16,000 lb (≈7.3 t) single‑point wheel loads—but they differ significantly in construction and optimal use scenarios.
Designed for moderate traffic: Ideal for areas with low vehicle volume (under 25 mph), such as parking lots and gas stations.
Lighter & cost‑effective: Less reinforcement makes them easier to install and more budget‑friendly.
Enhanced durability: Built with extra reinforcement to withstand higher traffic loads like in loading docks and truck entries.
Longer lifespan: Greater resistance to fatigue means less frequent maintenance or replacement.
Higher cost: Ductile iron or thicker construction increases price, but reflects better performance over time.
| Feature | Medium‑Duty | Heavy‑Duty |
|---|---|---|
| Load Rating | H‑20 (≤16,000 lb) | H‑20 + extra reinforcement |
| Typical Use | Parking lots, gas stations | Truck docks, industrial zones |
| Weight & Handling | Lighter, easier install | Heavier, more robust |
| Material | Standard cast iron | Ductile iron or thicker cast iron |
| Cost | Lower | Higher |
| Longevity | Moderate | Extended |
Your choice depends on traffic volume, load type, and budget:
Light commercial or residential areas: Medium‑duty is cost‑effective and sufficient.
High‑traffic or industrial zones: Heavy‑duty offers longevity and better performance.
Ultimately, investing in the right cover safeguards infrastructure and minimizes future replacement costs.
Identify your site’s traffic profile and expected loads. Then choose the cover type that aligns with those conditions. For custom solutions or detailed guidance, contact a specialist or request a quote.
