Upper floor weight assessment - math required

[hatTT]

Hi,

I added tiles on my upper floor, let’s assume that it’s 55 m2, based on regulations, it should support minimum 150kg / m2, but I’m not sure if this would be valid also for the total.

The total would be 150kg * 55 m2 = 8,250 kg, doesn’t seem a bit too much?
The house is very recent, 2014 or so, concrete walls and bricks outside as rendering I suppose, I don’t think they’re part of the structure.

So, on top of being a huge doubt, another doubt is about the single m2 tolerance, which I’ll never know, I have one electric boiler which in theory could weight 250kg in total (including the floor below), some idiot installed it on the upper floor and that’s it, I have to deal with it, I’m thinking to remove it or to move some heavy items far from it, and it still doesn’t solve that problem.

The floor already weights 25kg / m2 for the tiles, and supposedly 11kg for the concrete glue that they used, so 36 kg * 55 m2 = 1,980 kg.
I heard some crack in the recent days, maybe it’s assessing, maybe it’s not, who knows…

 

[blup]

The joists will carry far more weight near the ends than in the middle

 

[hatTT]

The joists will carry far more weight near the ends than in the middle

Thank you, but is the 150kg / m2 still valid on the entire floor?

I think I can add just the bare minimum around that boiler to prevent issues, like a desk etc, or I set it in a way to be filled at half tank if possible.

 

[blup]

i had half a ton of plaster stored at the end of first floor joists with no long term problems. I cant see how a boiler situated at the edge would cause a problem, Just nail a couple of loose timbers at right angles across several joists to spread the load.

 

[hatTT]

i had half a ton of plaster stored at the end of first floor joists with no long term problems. I cant see how a boiler situated at the edge would cause a problem, Just nail a couple of loose timbers at right angles across several joists to spread the load.

It’s an electric boiler with a water tank, approx 250kg with the tiles on that single m2.
The electric boiler is in the center, but I’m not sure if the middle wall is at the end of the wooden bar (or slab), I’m not sure if it keeps going up to the other side of the house, or if it stops in the middle concrete wall.

I can’t perform structure changes, I’m living inside and I believe that I have the plasterboard on the ceiling.

On by the way, in one of the ground floor rooms I see a few marked lines on the ceiling, like a wooden bar that has come down in somehow, but not all of them, just two, I’m quite worried about it because if there is supposed to be a plasterboard on the ceiling, then it means that it has sagged a lot, touching the plasterboard, is it possible??

I don’t see the same in other rooms though.