How much can a floor deflect?

The wall enclosing the refrigerator/freezer has been removed. The studs had about 2mm of space above and below. There was a 9mm particle board holding the studs in place. The refrigerator/freezer has been turned 90 degrees counter-clockwise so that they are along the remaining wall.
The floor in the front, between the refrigerator/freezer, now deflects 5mm, causing the units to lean beautifully towards each other. There was a depression there even before the new refrigerator/freezer was installed. The area is in the middle of the previous placement of the refrigerator/freezer.
I have also measured the studs in the crawl space, and surprisingly, there is a stud right across the depression +/- 10cm.

The floor consists of Kährs-Linneá, beneath it 18mm particle board, studs, insulation, and a crawl space.

How much can a floor or a stud deflect?
Is there something that needs to be addressed?
 
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Hello,

I think you are in the wrong part of the forum to get an answer to this question.

To begin with, I guess you are mixing up 'svikt' with 'svacka'? 'Svikt' is when the floor temporarily bows down under load. There are some regulations for how much a floor is allowed to "flex," but I can't remember off the top of my head. A 'svacka' doesn't necessarily need to be addressed; however, it might be wise to consider why it appeared. I believe you don't need to worry about as little as 5mm. It could be as simple as the beam underneath having dried a bit more than the ones next to it.

As I write this, I think I understand more what you mean. You might have a 'svacka' in your subfloor with a parquet floor on top that flexes in the 'svacka'. That 'svacka' should ideally have been addressed before the parquet floor was laid!
 
Slump is probably the right word.
In discussions with people outside the forum, answers are given that it might be the particleboard that has been compressed.
 
Mikael_L
I'm not really following...
Does the floor slope 5mm over 60cm? If so, that's really bad.
 
Mikael_L said:
I'm not really following...
Is the floor sloping 5mm over 60cm? If so, that's really bad.
Yes,
at a distance of 0 -> 120cm, the midpoint is 5mm lower than the points at 0cm and 120cm in front of/between the fridge and freezer.
 
If you can get down into the crawl space, I would consider propping up that specific board that is under the sag and trying to press it up to level, if possible.
If it's possible, remember a capillary-breaking layer under the support.
 
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