How to attach carport posts to existing concrete slab

[Novisfixaren]

How do you attach posts to a carport on an already cast concrete slab?

I would preferably not have the post directly against the concrete slab either, perhaps I thought of placing a paving stone in between, but the question is how to do the fastening in the simplest way?

 

[Mikael_L]

Set the posts in some kind of iron
Something like this:
https://www.biltema.se/bygg/byggbeslag/stolpskor/stolpsko-d-2000023695
https://www.byggmax.se/stolpfundament-golv-96-jabo-svart-p683455


So just the iron/post shoe between the post and the plate.

 

[Novisfixaren]

Okay, and with bolt and plug down into the plate, or?

Or better to drill a large hole and then threaded rod and chemical anchor?

 

[Mikael_L]

I think I would have used some nice plug and hot-dip galvanized screw, possibly French.

There are also concrete screws that are screwed directly into the drilled hole in the concrete, without a plug. A lot of different brands are available, e.g.
https://www.k-rauta.se/produkt/betongskruv-essve-75x65-indu-prog-100st/7317761015710

But in any case, watch out for simple electro-galvanized, it usually takes a beating in connection with concrete, hot-dip galvanized, stainless, or some other better surface treatment should probably be used.

 

[Novisfixaren]

I think I would have used a nice plug and hot-dip galvanized screw, possibly French.

There are also concrete screws that go directly into drilled holes in the concrete, without a plug.
A lot of different brands exist, e.g.
[link]


But in any case, watch out with simple electro-galvanized, it usually gets damaged in conjunction with concrete, hot-dip galvanized, stainless steel or some other better surface treatment should probably be it.

I think I would have used a nice plug and hot-dip galvanized screw, possibly French.

There are also concrete screws that go directly into drilled holes in the concrete, without a plug.
A lot of different brands exist, e.g.
[link]


But in any case, watch out with simple electro-galvanized, it usually gets damaged in conjunction with concrete, hot-dip galvanized, stainless steel or some other better surface treatment should probably be it.

ok sure, you could put a paving stone in between if you want to raise the height even further?

 

[Tomture61]

You write carport, I assume the slab is not insulated with L-frigolit support, or?

 

[Novisfixaren]

You're writing carport, I assume the slab is not insulated with L- Styrofoam support, or?

No, uninsulated

 

[Tomture61]

No uninsulated

Ok, a bit more fragile at the edges with edge elements in Styrofoam.
Please elaborate on "paving stone between post/cement slab" type of material in the stone.

 

[Novisfixaren]

ok sure you could have put a paving stone in between to raise the height further if you want?

Maybe better to plug the iron into the concrete slab first, then build a form 10x10cm and 5cm high and fill with fine concrete to get additional elevation under the post?

 

[Novisfixaren]

Ok, a little more fragile at the edges with polystyrene edge elements. Please elaborate on "paving stone between post/cement slab" type of material in the stone.

By paving stone, I mean a type of loose concrete slab from which I cut a "block."

but

Perhaps it's better to anchor the iron in the concrete slab first, then build a form 10x10cm and 5cm high and fill it with fine concrete to achieve additional elevation under the post?

 

[Tomture61]

By paving stone, I mean a type of loose concrete slab from which I cut a "block."

but

Maybe better to plug the iron into the concrete slab first, then build a form 10x10cm and 5cm high and fill with fine concrete to get additional elevation under the post?

Probably looks nicer maybe

 

[Novisfixaren]

Looks probably nicer maybe

You mean the last ones?

 

[Novisfixaren]

Are plugs and screws sufficient or is it better with chemical anchors and threaded rod?

 

[Tomture61]

You mean the last ones?

Yep.

 

[Tomture61]

Are plugs and screws sufficient, or is it better with a chemical anchor and threaded rod?

Chemical anchor + screw for concrete, that's what I think!
There are probably professional products regarding strong screws for concrete, but I don't know how easy it is to buy/find them.

Edit.

Expansion bolts seem to be strong tools, work without chemical anchor