Screwing into rock, what is needed??

[Återfall]

I am going to cast posts on rock and want to anchor the post form into the rock. I was thinking of using some simple angle iron and screwing/attaching it to the rock.

What is the screw, spike nail?, that I'm looking for called and how do you do it?

//Anders

 

[Återfall]

Something like this: But attach the plinth like this:

 

[mexitegel]

Isn't it easier to pour a small batch at the bottom of the mold first so you don't have to drill and hassle with iron etc.?

 

[Återfall]

Sure, it might be easier? But isn't there a risk that there will be a "fracture" where you continue with the casting later?
I've never done this before but thought it would be nice to get everything level and then fix the mold against the rock.

 

[Lutte]

Just need to reinforce and then pour a base that holds it in place. No problem with any cracking.

Alternatively, you can foam the form against the rock; then it will be stuck tight as hell.

 

[mexitegel]

No, you don't need to worry about that. You also have reinforcement drilled into the rock, right?

 

[Återfall]

No, you don't need to worry about that. You also have reinforcement drilled into the rock, right?

Relief! Yes, 3 pieces of 16mm iron per footing. The footings are 200x200 with a point. I also got a bit worried that I drilled the holes too close and centered. I'll probably have ample coverage for certain corners. Will it work, or should I add an extra hole, do you think?

 

[Återfall]

 

[mexitegel]

That will surely be good, the rebar should not be too close to the surface of the concrete either. There's a risk it will be exposed to moisture and start to rust, resulting in cracked concrete.

 

[Återfall]

So good! I'll go with that. Thanks for the help!!
//A