Doctor_Frasier_Crane t1_jecfnpj wrote on March 31, 2023 at 12:12 AM

That would make me nervous. Ceiling joists are usually just 2x4 trusses, maybe 2x6 at most. Not meant to carry heavy point loads and especially not in a single 500 lb weight.

Would be mildly better if it was closer to a wall than in the middle of the room.

If you must do it, don’t just place a 2x4 or even 4x4 across the top of the joists. The hole to connect to that would be difficult to seal properly.

I would build an inverted-T shape the same depth as the joist. The part between the joists is a 4x4 (or whatever height of the joists) and gets attached through the sides of the joists with proper construction screws. Then a longer piece of 2x4 is laid flat across the top of the insert and across at least 2-3 joist on either side and screwed into any wood it’s going over.

Drill a hole through the assembly into the room below. Insert proper eye-bolt (rated for 600lb or more) with a washer and nut on top to secure it.

me-chewbacca OP t1_jech69t wrote on March 31, 2023 at 12:23 AM

Yes, it's 2x4 joists. It is close to the outside wall and another internal wall but the internal wall is just aluminium framing and I don't think it plays any structure role in it.

I am trying to understand what you proposed. Doing some research. Thanks.

Doctor_Frasier_Crane t1_jee5urf wrote on March 31, 2023 at 11:10 AM

https://i.imgur.com/NfdnTrR.jpg

First pic is the blocking, second is the board running over the blocking and joists with the bolt poking through the assembly.

me-chewbacca OP t1_jefp00f wrote on March 31, 2023 at 5:53 PM

Thanks!