1. Start with the intended use and platform footprint
Decide whether loads will be uniformly distributed, concentrated (toolboxes, materials), or moving (people walking). Concentrated/dynamic loads reduce allowable capacity.
2.Check/establish manufacturer rating
If the lift is commercially supplied, use the manufacturer's rated capacity and placard. Never exceed it in use; standards require this. If you are designing or modifying, proceed to engineering checks.
3.Stability / tipping analysis (critical)
Determine the combined center-of-gravity (machine + load) envelope at maximum platform height and any platform extension. Compute whether the CG remains inside the stability polygon (wheelbase/support footprint).
Consider sideways overturn and longitudinal overturn under uneven loads and on allowable slope (many compact units are for indoor flat floors only). Standards require stability checks and often limit outdoor/windy use. Wind loading can reduce allowable personnel/load capacity for outdoor use.
4.Ground/bearing checks
Check wheel/footprint bearing pressure vs floor rating (grating, mezzanine). Concentrated loads can damage flooring or cause instability.
5.Fatigue and dynamic loading
If the load will be repeated frequently, check fatigue life for welded joints and pins. Allow a dynamic/impact factor where loads are moved or set down abruptly.
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