I got to thinking about the stresses on a pole used for hanging a hammock. If I remember correctly, each end of the hammock is carrying half the weight. I'm 220, plus clothes, hammock and accessories, so lets say 230 total and 115 on each end. It would be the same as rigging one of those timbers sideways with 6 feet sticking out over a fixed edge with 115 pounds hung on the tip, and there is some "bounce" involved too. I would know better than to try that, particularly with the low grade lumber.