A couple of years ago, I hung up my daughter's gymnastics rings in a 60s apartment building. The concrete is the hardest I've ever encountered, and drilling the four 12 mm holes was a nightmare in itself... but an even bigger problem now is getting the bolts out as we're moving. One bolt was kind enough to just unscrew/release itself, but the others just slip as the "nut" moves freely against the "metal plug" (sorry if I'm not using the correct industry terminology, I'm too much of a novice). I managed to get one out halfway with a lot of force, but now it's completely stuck (crowbar, two people, and an arsenal of swear words).
https://www.amazon.se/dp/B08TR1XDYB/
In the link above you can see what the bolt, metal cylinder/plug, and nut look like. I also wonder if there weren't milled grooves on the cylinder where the nut is, causing the nut to be pressed into the cylinder and making the cylinder expand inside the concrete... they've stayed put as if glued. But how do you get it out?
I can't just angle grind the bolt head off inside an apartment, way too many sparks and risk? Can you drill away the bolt head, remove the metal bracket that the rings hung from, and then just fill over it? Dremel?
My low-budget hammer wasn't up to the job anyway, so I'm open to all good advice
https://www.amazon.se/dp/B08TR1XDYB/
In the link above you can see what the bolt, metal cylinder/plug, and nut look like. I also wonder if there weren't milled grooves on the cylinder where the nut is, causing the nut to be pressed into the cylinder and making the cylinder expand inside the concrete... they've stayed put as if glued. But how do you get it out?
I can't just angle grind the bolt head off inside an apartment, way too many sparks and risk? Can you drill away the bolt head, remove the metal bracket that the rings hung from, and then just fill over it? Dremel?
My low-budget hammer wasn't up to the job anyway, so I'm open to all good advice
Last edited:
Cut... Reciprocating saw is perhaps the smartest in a home.
Reciprocating saw..
You place something thin yet durable, like sheet metal against the ceiling and let the saw blade bend against it.N Nudeln said:
Beginner's question, but is manual or machine easier? As I mentioned, it might be difficult to access with a bulky machine?RoTe said:
Here's another thing, are there metal blades for one of these? Is it worth considering?
https://www.amazon.se/Bosch-Professional-multiverktyg-Starlock-BIM-instickssågblad/dp/B018YPFM4Q/
It's quite tricky, it looks like a bolt with threading in a cone. There might be concrete dust on the threads, causing it to jam. You should try to tighten the bolts a bit more if possible. If any sleeve protrudes beyond the concrete, you might hold it with a larger pliers or a small pipe wrench, though it's more difficult if the sleeve is flush with the ceiling. If there is a small gap between the bracket and the ceiling, you might be able to use a crowbar to tighten so the cone locks. If the bolt loosens, there's only one way to remove the sleeve: by twisting it around, but it's difficult since it has expanded in the hole.
Tigersåg is much more efficient on such thick metal..N Nudeln said:
Smart alek
· östergötland
· 2 658 posts
There are blades that handle that without problem with the multi-tool... But they are not cheapN Nudeln said:
Now it's done. The neighbor came over with a Dewalt reciprocating saw and made short work of it... Took maybe ten minutes in total to cut the remaining three bolts. Thanks for all the good advice and to my neighbor!
Only one layer (damp) of putty yet, thinking the final result will be a bit better with a couple more layers and some paint 😊
Only one layer (damp) of putty yet, thinking the final result will be a bit better with a couple more layers and some paint 😊
