Foundation for a garden house of 18 m2

  • Erstellt am 2022-03-03 17:45:10

littlebird

2022-03-03 17:45:10
  • #1
Hello

This is a garden shed (approx. 3 x 6 m) that needs a foundation. The garden shed is practically standing in a field, and it is difficult to use large amounts of concrete. The ground is planned to be constructed with structural timber 12 x 12 cm (frame 3 x 0.6 m).

Now the question arises whether a "proper" foundation is needed here (80 cm depth) or if "concrete footings" are sufficient? If a deep foundation is required, then I can only imagine a point foundation (making holes with an earth auger and pouring concrete).

Thank you!
 

Tolentino

2022-03-03 19:00:33
  • #2
Then just do it like that. In principle, you can probably only say for sure with a soil survey. But for a garden shed, I wouldn’t go to great lengths. Just make two more point foundations, the holes with a nice diameter, and maybe even a bit of steel inside.
 

littlebird

2022-03-04 10:47:36
  • #3
Thank you, I think this is the safest way. Which grid is recommended here? Of course, I want to make as few pier foundations as possible. My concerns relate to the beams for the floor of the garden shed, which can bend if the grid is too large. A little bending is alright, but not too much (the garden shed will already be somewhat heavier as it is insulated and clad with Rhombus slats).
 

Tolentino

2022-03-04 11:15:34
  • #4
Well, it probably also depends on the thickness of the beams. With 8x8 or so, I would have put 2 on the short sides and three on the long sides. If you want to use narrower ones, you might need more. But so far it's only theory for me, maybe a practitioner will chime in.
 

littlebird

2022-03-04 12:08:09
  • #5
The beams are 12 x 12 or 6 x 12. Then it would be a grid of 1.5 m x 2. On the internet, very small distances (50 - 80 cm) are often seen.

I find that too much, but I have no idea either. Especially if the foundations are anyway 80 cm deep (diameter 20 - 30 cm).
 

Tolentino

2022-03-04 12:17:18
  • #6
Exactly in that example, it only makes four, right? Well, that will be smaller. You need the smaller distances if you want to lay the floorboards directly on the beam. They are usually not that thick and would otherwise bend. But you can just as well add cross battens over the support beams to reduce the distances. I am of the opinion that at 12x12 you don't need to worry, three on the long side should be enough. But I am not a structural engineer, not a carpenter, and have practically never done something like that. So take it with caution.
 

Similar topics
13.06.2013Is wood enough for a garden house?11
05.07.2016Foundation for garden house with approx. 364 cm x 304 cm external dimensions13
27.04.2017Toilet & urinal in the garden house12
09.04.2021Garden house picture thread - Show us your garden house pictures106
25.05.2018Garden house - What size and what kind of ground?27
13.09.2018Choosing the foundation for a garden house - Which is the most cost-effective?12
11.03.2019Garden house and WEG shared corridor parcel23
22.11.2019Living in the garden house in summer11
31.03.2020Wooden garden house: roofing felt instead of wall barrier membrane?10
18.11.2020Garden house as a basement replacement room?25
22.03.2021Looking for a 3x3 meter garden house with a high door15
06.05.2021Garden house, what should one pay attention to?10
10.09.2021Garden house / shed ground!?32
01.08.2021Slab foundation for garden house14
23.02.2022Basement under garden house - procedure?13
09.11.2021Cost check foundation garden house 4x413
21.02.2022Is insulating a garden house sensible or unnecessary?17
12.01.2024Experiences with Keter garden house19
27.09.2024Point foundations Pergolux: from when are they loadable?32

Oben