This board with its edge facing down. Can I hang and use a 100lb punching bag from it without breaking any part of the ceiling?
How do you think I should do it? Should I put a strong metal bracket over the top and bolt the hook to that?
Wood – hang a 100lb punching bag from this joist
wood
Related Solutions
Sounds like trouble to me. Superglue won't do you any good, as it's only as strong as what it's gluing to (and I suspect here it would be far less strong).
Some alternatives:
- Cut away a square of drywall and replace it with the same thickness plywood, glued to whatever is behind (e.g. that metal). Then apply a thin coat of plaster, paint, and then screw into it
- Find out just what that metal is, and consider screwing into it
- If the curtains will generally hide that bracket, consider gluing a thin piece of plywood to the surface of the drywall and screwing into that
I'd cut a strip of aluminium or similar sheet metal, fit it around the wooden rod and clamp it to the eye-bolt using a separate nut and bolt that pass through holes in the clamping strip and through the eye of the eye bolt.
If I didn't like to look of the bolt I'd see if I could find a large enough rivet or other type of fastener.
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Best Answer
I wouldn't call that a joist, I'd call that a tie. A joist is something supporting a floor, designed to take vertical loads in bending. A tie is something designed to take tension loads, in this case that tie is there to stop the roof spreading sideways at its base.
Now, just because it is a tie doesn't mean it can't also take some vertical load. In fact, it looks like there may be a vertical member running from the roof ridge down to this tie, which in all likelihood does bring some vertical load down onto the member.
So the important question is "What spare capacity is there for vertical loading on this member?". If you put bending load into a member, you reduce its capacity for axial force. So in order to answer, we'd need to know:
We really can't answer all of this over the internet. You could employ a structural engineer if you want, though this might be overkill. But, never fear, I have a solution!
I'd be happy to expect the walls to be able to take an extra 100lbs. So what we want to do is, instead of risking overloading the tie and destroying your roof, put in a new joist specifically to take your punching bag. You can take a flyer and just buy one if you want, or you can try and do some engineering calculations for it, to make sure you get a big enough one. There are a few questions on here about joist design, if you search for them.