Re: Lifting pax hand-luggage into overhead bins
Nope. Don't touch it.
I don't even do it now as ground staff if someone needs a hand carrying it to a gate, or up/down stairs.
If it's too heavy for you to lift above your head or down some stairs then it's too heavy full stop. Check it in.
Hand luggage should ONLY contain the things you need for the flight - and there's nothing i could possibly imagine i would need that would be so heavy i couldn't pick my own bag up.