Dismantle expansion nail

[Supermandus]

Hello,

I am in the process of taking down an interior wall consisting of plasterboards and metal studs and everything has gone fine until I try to remove the outermost studs that are attached to the adjoining concrete wall with some form of expansion nails.
How do I remove these nails? They seem to be some form of hard metal since I haven't even managed to drill them out.
Any tips?

Mandus

 

[Atom]

Photograph it. Standard expansion nails have Ph grooves for unscrewing. It will be easier if we see what you have. Otherwise, an angle grinder will fix most things.

 

[smurfen72]

Isn't it a nail shot with a nail gun, but most things can usually be arranged with a ko ben. Unscrewing nail plugs might work sometimes but usually not.

 

[Supermandus]

This is what it looks like, what may be mistaken for a bit's trace is me trying to drill off the head without success. It actually has a completely smooth head.

 

[s97danl]

Remove with the angle grinder. Sometimes the crowbar works, but not always.

 

[Atom]

Angle grinder.

 

[Supermandus]

Angle grinder.

Feels a bit dangerous to use an angle grinder indoors. But maybe it will have to be that anyway.

 

[Real7]

Strange. It does look like it should be fine to drill. It is significantly nicer than an angle grinder, so it might be worth another try, with a good drill bit.

 

[Atom]

Wet towel over the grinder works wonders. Catches everything. You shouldn't cut into the dust-creating concrete! Just a little steel.

 

[smurfen72]

Take a chisel and knock off the nail doesn't take many minutes and is not flammable.

 

[Atom]

Take a chisel and knock off the nail, it doesn't take many minutes and it's not flammable.

Some are so hard, that it is pointless.

 

[smurfen72]

If they are hard like nail guns for example, it's easy but you need something substantial to hit with, a carpenter's hammer won't do.

 

[Supermandus]

I thought I would tell you how it went.
Since I wasn't comfortable using an angle grinder indoors (never used an angle grinder before), I took the detour of drilling up the concrete around the nails just enough to be able to cut them with bolt cutters.
Quite cumbersome and I have some spackling work ahead of me, but the result should at least be good.
But man, there are some really hard nails on the market...