There was a terrible accident in Boston last week where a woman hanging in a hammock was seriously injured when the chimney the hammock was attached to collapsed on her.
See news story here...
https://www.boston.com/news/local-news/2017/07/18/family-of-woman-injured-by-falling-chimney-in-north-end-says-it-would-be-miracle-if-she-walks-again
Just a reminder that a hammock is a mechanical system that can create forces much greater than just the weight of the person in the hammock.
The horizontal shear force created in a two point hang = 1/2 weight / tan (angle of the hang)
At low angle hangs the forces can be quite large. A two hundred pound person hanging at an angle of 5 degrees would produce 1143 pounds of horizontal sheer force at each off the two attachment points. Please be sure the structure you are attaching to can withstand these type of forces.
A 30 degree hang produces a much safer sheer force of 173 pounds for a 200 pound person.
Be careful out there.