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Not sure if ceiling anchor is the correct term, so I attached a picture for reference.

I removed the drop ceiling from my basement, the metal frame holding the tiles were screwed into these wholes (anchors?), so I have quite a few across my concrete ceiling (roughly 1-1.5 meters apart from each other).

My question is, how much weight can these anchors support? They are about 2 cm deep and 9 mm wide. I am thinking of installing a hammock / pull up bar / perhaps use it to support a small bouldering wall if possible.

Any answer is highly appreciated!

enter image description here

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  • As a test you could screw in a bolt and see if you could rip a sample anchor out with a crowbar. That would give you a very rough idea.
    – StayOnTarget
    Jan 1, 2020 at 12:53

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It would be very difficult to say without knowing the exact company and part number. I found reference to something that might be similar here:

https://www.ccinetwork.com/p-39-38-sanko-shorty-drop-in-anchor-box-of-100.aspx

The info sheet says 2,200 to 5,500 pounds, but again, I wouldn't mount anything expensive or dangerous in them without a lot of stress testing. It would probably be worth bringing in a contractor to take a look and give you some kind of idea.

Drop ceilings don't weigh that much and it sounds like the weight was distributed over a lot of these anchors so that would suggest to me that they are not designed for heavy loads.

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  • Thank you, that would be my guess as well. I don't think too much was invested into these anchors so as you suggest, I'll go with "probably not enough to hold something heavy", specially a moving object
    – vivasra
    Jun 22, 2017 at 23:45

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