Well when I built my daughters hang in her room
and my wife felt it made it look like a barn . . .
I figured she wouldn't appreciate a hang spot in my room.
So after some time figuring . . . the basement, which is more like a big storage room
was the only place to do it.
Slid some ceiling tiles over and viola floor joists.
placed my doubled 2x4s on the out sides of the floor joists
and ran 5" decking screws from the other side of the joist up at an angle
and as it entered the 2x4, sucking it down into the floor.
With both of those done a 2x4 along the floor to keep them from sucking in,
and yahooooooooo . . . I Hang as I please.
'cept my older daughter wished to try as well.
Shhhhh . . . don't tell her I am sewing her a hammock for Christmas.