Distance between foundation piers

[fredand44]

Hello!

I'm going to request a quote for the casting of footings for a patio. (I don't think it matters for the load-bearing capacity, but I'll mention it anyway; some of the footings will be over a meter high).

I would like the footings to be set at such a distance so that in the future, we could build on top of the house if the municipality grants permission.

Is there a standard measurement for the distance between footings that I should ensure to achieve the load-bearing capacity I want?

Looking at Byggmax, they seem to say 2 m:
https://www.byggmax.se/gör-det-själv/altan-och-trädgård/bygga-altan

Looking here, it seems to be different, 2.3 - 3.0 m depending on the dimension:
http://www.husgrunder.com/altan/altan-reglar-plintar/

Looking here, I have to be honest that I don't understand at all:
http://www.traguiden.se/konstruktio...balkar-till-1-planshus1/?previousState=110000

Regards,
Fredrik

 

[larsbj]

No, there is no standard measurement.

There are mainly two parameters to consider: if you increase the distance between the plinths, the need for a beam between the plinths increases. If it's less than 2m, it can be resolved with regular construction timber in a simple way.

The area of the plinth at the bottom (ground's bearing capacity). If it's to support a house, the plinths should be of the type that has a plate at the bottom, like 600x600mm.

 

[fredand44]

Thanks for the reply!
Then it sounds like a minimum of 2 meters distance. Now I might be a bit lucky because it looks like half of the piers will stand on rock. But for the others, I will make sure they cast a slab.
Regards
Fredrik

 

[holmberg87]

Thanks for the answer! Then it sounds like a minimum of 2 meters apart. Now I'm a bit lucky because it looks like half of the plinths will stand on bedrock. But for the others, I will ensure they pour a slab. Regards Fredrik

You mean a max of 2 meters apart, right

 

[fredand44]

Haha, that got a little crazy.
/Fredrik