A trained human might be able to deadlift 350lbs under ideal circumstances like being in a gym. No one is capable of lifting and holding that sort of weight for

A trained human might be able to deadlift 350lbs under ideal circumstances like being in a gym. No one is capable of lifting and holding that sort of weight for an extended period of time. For an average human under realistic circumstances, lifting 100lbs over your head is a difficult task. Lifting much more than 50 lbs unassisted frequently in a work environment is likely to lead to injury.