Studfinder with setting for metal stud?

No good way to tell. Try going in the same hole on an angle to miss the rebar.

Stanley makes a magnetic stud finder for about $5 (model 47-400). It's basically a magnet on a pivot. It might work for you. However, if there's a lot of rebar, it could be more confusing than helpful.

Rebar is just steel. Why not swap to a standard drill of the same size and continue in the same hole?

I worked with drilling into concrete ceilings for a living. Put the anchor diagonally in any direction from the current dud hole compared to the rooms angles.

Sounds complicated - but isn’t. Most rooms are square or rectangular. Just go from your hole towards a corner in the room by about 10 cm and try there instead. Most anchors are fine to be at a slight angle, and whatever you hang in them should be adjustable by a tiny amount anyway.

If It isn’t, just move the whole mount anchor by that same amount in the best suited random corner of the room direction.

They do make bits called rebar eaters. If you find a hole with rebar you can switch bits and turn the roto hammer on drill mode, it will cut right through.

Thanks this is very interesting advice. I'm actually putting in climbing anchors, so they need to hold a lot of weight.

I ordered a device for detecting studs and cables from amazon. Hopefully that will also be useful.

Ooh climbing anchors sound fun. That’s got to be quite deep to hold any good weight in concrete. I only worked with static weight anchors - once finished there will be no change in weight or pressure at any given anchor.

To have concrete holes drilled that could hold a lot of weight shifting over and over seems like It mostly Depends on the anchor, since regular screws rarely hold anything over 5 kg reliably, and not when you jerk It around.

If you don’t mind, keep me updated! I’m intrigued.

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Rebar is meant to have 50mm approx cover of concrete. Sounds like you found dodgy construction if youre hitting it at 10mm. Slowly drilling into steel with a titanium drill head should get through it however

I think he meant 10mm diameter holes.

The reason for this is that the rebar is most likely a grid of 20cm squares placed along the walls of the room. If the ceiling is poured concrete. If, on the other hand, it is made from prefab elements, all rebar will probably run in one direction only.

Haha im an idiot

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