Question of Force

[Dos]

I have a new apt. 2nd floor.
I had a VERY difficult time finding studs as this place is over 40 years old,
and mostly adobe style.
I hung the porchswing bolts I have (rated at 1500 pounds)

1 - was in the header above and slightly left of the front window. 83" off the ground.

2 - I could not find a stud in another wall, so I found a joist in the ceiling ( I could tell by the tape marks as well as trying with a pilot hole - well, several )
that is approximately about 16 feet away. The ceiling is 8 feet high.

I have been sleeping in this for about 6 weeks now when I looked up one day and noticed that the ceiling hook is angling toward the other hook and looked as if it was going to fall out at any second.

I am hanging in a Yukon (the Woot special one) since I am waiting on my other hammock. The Yukon is quite a bit wider than my HH, and I had great difficulty getting out one morning...and I would categorize this as I actually, in trying to get out of such a deep well, fell out of the hammock (controlled fall )

I later screwed the hooks to the point of denting in the sheetrock and They cinched right back up.

Haven't hung in it yet. (not too far to fall....less than 18 inches.)

Just needing some thoughts on static or shear force and this different configuration of hanging.
Or do you think I should just get some longer lags?

thanks for you help.

[Dos]

here's a pic of the one in the ceiling....

[dammfast]

Is the force being applied is the same direction as the joist? If you are not pulling longitudinally you will easily split the wood you have screwed into and could potentially split out a large section of the joist.

[nothermark]

How long are the hooks you are using now?

It sounds like you are working the hooks in the wood thus enlarging the holes. What concerns me is how much of the hook is threaded in wood and how much is just passing through plaster. You probably want inches into the wood.

[Dos]

Is the force being applied is the same direction as the joist? If you are not pulling longitudinally you will easily split the wood you have screwed into and could potentially split out a large section of the joist.

longitudinally.

How long are the hooks you are using now?

They are 4 inches.
I pre drilled (with a smaller bit) but did not tighten them all the way up to the plaster.

I DID NOW!!