Suspending heavy objects from ceiling

Amphibian

Bit of a DIY query here.

I have a baby hammock that I want to attach to my ceiling. I live in an old house with exposed ceiling joists, which are also the floor joists of the floor above - if you see what I mean. The joists are not very large at all, they are only 2x4".

There are loads of guides to hanging heavy object from ceilings - such as punch bags - but these never seem to discuss the structural safety of boring holes into joists.

Likewise there are plenty of discussions about drilling through joists for piping or wiring, but these are all about lateral not vertical drilling.

What I am thinking of doing is inserting a 8mm threaded lagbolt vertically upward into the joist, to 25mm depth - I know it'll support the weight of the hammock, that is not my concern, my concern is seriously weakening the joist itself and thus causing a seriously dangerous and costly issue.

Am I right to be concerned or being daft?

keystone

For a start off you'll get away with a lot smaller bolt than 8mm for a baby hammock and yes you are worrying overly.

Cheers

tony6403

Keystone is right.
Would a hook be a better way to go?
6mm would be fine. Only needs a 3mm pilot hole.