Hi!

I live in a prefab house and have done so for just over 2 years now. I've been renovating back and forth and have now started approaching the basement. I've started to think about a couple of "beams" that are located in the ceiling in the basement in a few places. It's very unclear how these are attached, but they are attached to the elements that act as joists for the ground floor. I can't see any nails or anything else holding them. Unfortunately, I also lack the original plans for the floor joists for the ground floor.

The first thought, of course, is that these are there to reinforce in some way, but it seems like they are attached too poorly to serve that function. They don't rest on any walls but end before the wall. So they are only "hanging" in the ceiling. Additionally, they are spliced by just continuing a new piece where the first ends.

Does anyone know the exact function of these? Could it be to reduce deflection or something like that? Would it be possible to achieve that function in some other slightly more discreet way? Perhaps by screwing some sheet material into the entire basement ceiling? Is it even possible to remove them without damaging the elements?

Image of a basement ceiling with visible wooden beams hanging, showing a window on the right, used as temporary support with unclear attachment. Wooden beams attached to a basement ceiling, extending without visible support, with a workspace and a small window nearby. Ceiling with exposed beams in a basement, showing wooden planks and joints, with a white beam spanning across, near a stairway and a white cabinet.
 
A little late, but from what I understand, these are meant to hold together the elements/boxes that the floor structure consists of. In this way, they reduce sagging. Likely screwed from above when the boxes were exposed during floor replacement.
 
B byggpetter said:
A bit late, but from what I understand, these are meant to hold together the elements/boxes that the floor structure consists of. In this way, reducing deflection. Surely screwed from above when the boxes have been exposed during floor replacement.
Kind of what I suspected, in other words.

Then I should be able to remove this and lock together the elements with a bunch of battens at 28x70 and then screw a ceiling onto it? Of course, the battens would be weaker, but considering it will be over the entire ceiling plus boards on top, it should be enough, I feel. Or am I way off?

This assuming it can be removed without breaking anything, of course...
 
I myself live in such a fantastic house, mine has a properly uneven kitchen floor (but no flex).

If you currently have even floors on the upper level, I wouldn't wake the sleeping bear without building the ceiling around these fantastic artworks (since the ceiling height isn't enough to build over...).
 
S Skyscraper said:
I myself live in such a fantastic house, mine has a properly uneven kitchen floor (but no give).

If you currently have even floors on the floor above, I wouldn't wake the sleeping bear by building the ceiling around these fantastic works of art (since the ceiling height isn't enough to build over...)
Yes. These houses are charming in their own way... ;)

The floor above the "beam" that is spliced has quite a substantial bump. It's not entirely impossible that the top of the bump is right at the splice, a bit difficult to estimate.

But in any case. Maybe it's smart, as you say, to build around them instead (if I even end up putting a ceiling there in the basement. Maybe it'll just be a new coat of paint).
 
Please show how you mean it looks on the top with the "kullen".
 
Sigurdh90 Sigurdh90 said:
Please show how you mean it looks on
the top side with the "bump"
Showing might be difficult perhaps. But in the middle of the bedroom floor, there is a peak. Large enough to be felt but small enough that I took a chance with a laminate floor where I glued the joints for it to hold. It has held up nicely for over a year now. If I place a 120mm pass on it and press down on one side, it differs by about 10-15mm or so.

The peak of the "bump" runs along the joints of the elements.
 
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