EOTConnect

Enter crane operating profile

Provide average usage to get an ISO class estimate. This is a conservative guide — consult manufacturers for final spec.

Average operating hours per day Load spectrum (state of loading) Light — mostly light loads Medium — mix of light/medium loads Heavy — frequent heavy loads Very Heavy — near-continuous heavy duty

How to use this tool

This calculator provides an indicative ISO duty class (M3–M8) based on your crane’s operating profile. To use it:

1. Enter average operating hours per day – time the hoist actively lifts or moves loads.
2. Enter average lifts per hour – number of load-handling cycles per hour.
3. Enter operating days per year – typically 250–330 depending on your plant schedule.
4. Select the load spectrum – choose whether your crane handles light, medium, heavy, or very heavy loads.
5. Click Calculate to get the recommended ISO duty class and FEM equivalent.

⚠️ Note: This is a conservative guide. For procurement or certification, always confirm with the manufacturer’s FEM/ISO duty class tables and technical documentation.