I purchased one of those indoor hanging swing chairs for kids, specifically this one, which is meant to be mounted in the ceiling with a single eye bolt. I want to hang this in a 38" space, between wall and bookshelf. This is pretty tight, so I need to mount pretty much in the middle. After finding the joists using a studfinder I found they are 24" apart in pretty much the worst place, a few inches near each side of the 38" space. In fact, directly between them is pretty much dead center.
My question is what options I might have to hang this swing (single strap) between the joists?
One idea is to attach a board between (what size? Attached how?). I do have access to the attic, there is some kind of loose insulation up there.
Another idea is to attach two eye bolts of some kind to the joists on each side and suspend with some kind of strap between, but again not sure the hardware I should use to do that.
Any suggestions are welcome. Thanks!