You should use a drill that fits the post shoes you will use. They typically have 12 mm iron at the bottom, right? For the foundation iron, you need to go up a bit in size.
What you're really asking is how to anchor your railing, right? More information is needed about what the railing will look like.
What you're really asking is how to anchor your railing, right? More information is needed about what the railing will look like.
Hello.
As mentioned before, they're not wobbly Jörn, that being said, they're not bad. I usually take the rougher iron with an 18mm pin, I believe.
Then I drill so they come as close as possible with the attachment against the rock.
Now I'm guessing you're going to build a deck, then you let the posts continue up through the deck to become railing posts.
Please explain what you're going to do so we can help better.
/Workingclasshero
Now I saw that you're going to make a railing, then you'll need to brace it and maybe use the previously suggested iron.
Good luck.
As mentioned before, they're not wobbly Jörn, that being said, they're not bad. I usually take the rougher iron with an 18mm pin, I believe.
Then I drill so they come as close as possible with the attachment against the rock.
Now I'm guessing you're going to build a deck, then you let the posts continue up through the deck to become railing posts.
Please explain what you're going to do so we can help better.
/Workingclasshero
Now I saw that you're going to make a railing, then you'll need to brace it and maybe use the previously suggested iron.
Good luck.
If it is just a straight railing, I would recommend plintjärn, two per post. With joist hangers in a straight line without any braces, there is a risk it will become wobbly.
The last time I did this, I drove down post shoes with 16mm iron in 16mm holes. The back of a wrench to prevent the post shoe from twisting and I used a sledgehammer to drive them down. A bit too much work perhaps, but I couldn't be bothered to go to the store to buy mortar, it would have taken over an hour...
If you need something to harden and fix the metal rod in the rock, you can choose between different expensive two-component adhesives or expansive concrete, which becomes much cheaper if you are going to cast many holes.