1. Load weight
Add at least a 25% margin to your heaviest load.
2. Lift height
Measure from the suspension point to the floor.
3. Duty class
M3 is enough for a few lifts a day. Choose M5 for continuous work.
4. Power supply
Check the supply voltage on site in advance. Where there is no power, you need a manual hoist.
5. Travel
Need to move the load sideways? Then you need a trolley or a crane.