Interesting. When we built the Lindal Cedar house years ago, I managed to lift a 6"X12"X14' glu-lam beam, single handedly, using 2"X4" levers and cribbing, one 4"X4" at a time to an 8'+ height. Forty years later, I wouldn't think about doing that.
Moderators may want to delete this as a post of relative stupidity. It did seem safe to do at the time.