I would like to install a mount point on the ceiling for my wife so that she can continue doing aerial work. This is the mount point I want to install:
As you can see, the equipment comes with expansion bolts. I HAVE NOT identified a joist in the ceiling (edited: I was wrong, see below) that is large enough to support these bolts, but to me, it seems counter-intuitive to remove material from the joist (drilling holes) for the expansion bolts and then putting the jackets in and bolting the flange in place. I understand the mechanism of action (I think), but I feel as though a longer lag screw with a small diameter pilot bore is going to have more surface area to hold onto, and therefore have more purchase overall and therefore a stronger hold on the joist itself. I could be completely wrong about this, though, which is why I'm here :-)
STUPIDITY EDIT: I had sworn that I had seen in the attic the joists in the ceiling. I was wrong. I went into the attic to take pictures for you, and I could not get a clear picture of them because they are obscured by insulation. So my brain was creating images that did not exist. I apologize.
To be clear about the forces involved: the activity in question is commonly known as "aerial lyra", with a semi-rigid hoop a bit under three feet in diameter, suspended by a doubled-up rope from a heavy carabiner clipped to the ring shown above. The hoop will be swinging back and forth, there will be shearing forces, etc.
This is what it looks like suspended. It is hard to find pictures in situ that are not in industrial settings since most of the time these are used in warehouses and lofts, not living rooms:
I feel that I am out of my depth here, and I do not want to damage my home or injure my wife. What is the safest, most durable way for me to mount this object to the joist in my ceiling?
My home was built in 1941, and is lathe and plaster construction. There is no drywall in the ceiling.
Edit: Sorry, I should have been putting info here and not in comments. Apologies.
Can you add a picture of the ceiling in question? I will get a picture of the ceiling and the joist in the attic.
Expansion bolts are used in cement/concrete surfaces. That's what I thought. Thank you for verifying that.
I would be very uncomfortable putting this on one ceiling joist, I think the strain etc from the movement will cause the joist to move and the drywall to fracture. Consider spanning several joists. Yeah, I was thinking this from the beginning, i.e. a plank firmly fastened between two joists with the swivel bolted in the middle.
The problem is that ceilings are not designed to support weight like this. To make this work SAFELY, you really need to consult a licensed and qualified architect or engineer to design the proper support structure for this load. In the end, that may be what I need to do if I don't want anyone to get hurt.
Is there another floor above the room you're planning to install this in, or is the roof above this room? No, this is a single story home with a ~30cm crawlspace below and a very small attic space above.
Thank you everyone for your input. I'll go get the pictures requested.
Second edit: Here's some pictures of the ceiling.