Piers under the shed

[zingo]

Before the ground frost, I want to pour the pillars that my new woodshed will stand on. It will be approximately 4 x 2 meters and 2 meters high. What distance should I have between the pillars if the joists it will stand on are 145s? Or should I have stronger joists? Or maybe 95 is enough? I will have pressure-treated joists and untreated wood in the rest of the construction. Note that it will be filled with wood, so the weight should be taken into consideration.

 

[Mats]

2 meters distance sounds practical in this case. Then I'm not sure if 145 is enough at that distance, but it should be, I think, without having calculated the least bit of it.

 

[zingo]

OK, thanks.
I was thinking of 4 x 3 plintar (1.33m x 1m between them) and then I'm on the right track.

 

[Mats]

Yes, then it feels safe. I don't remember if it's 145 or 195 I have under the house, but it's just over a 2 m span there.

 

[Mikael_L]

Yes indeed, also completely without calculating , 45x145 with a span of 1.33 meters must carry immensely much.
I recall that 45x220 usually works in joists up to 5 meters, and then it's not the strength that is the determining factor, but the deflection.

//ML

 

[Mikael_L]

I couldn't help but try to check my own data ;D
In the timber guide's tables for rough dimensioning, 45x220 K24 applies to spans up to 4 meters.
45x195 K12 supports a 3-meter span.
45x170 K24 also supports a 3-meter span.
These load cases also assume glued floor chipboard, which offers some reinforcement.
The dimensioning concerns residential spaces.
With non-graded timber, I think it's possible to use K12, without too much strain on physics, but visually inspect the beams so they're not full of knots and debris.

The table didn't go below a 3-meter span, but this information provides a hint about the dimensioning.

 

[zingo]

Thank you! Now I feel safe. May the firewood dry in peace.

 

[Mats]

Yes, it should be able to rest very securely on such a floor.