>>77066137Well we know the current world record for a deadlift is 1,100lbs and that is a single repetition of a compound motion.
That a human in peak physical form could lift a tonne ONCE, and not clean and jerk it, is probably the best guideline.
Manipulating the weight would be less, speed, durability, agility all take hits for max strength but being generous and allowing them to overlap, it would still top out around lifting 1000lbs once.