Can you drill into the floor of a prefabricated block of flats?

Question

Hi,
The question is probably terribly layman's, for which I apologize in advance, but I need to know - is there any electrical installation in the floors as standard in prefabricated blocks?
I'm asking because I have to drill 2 large holes in the floor (about 10-12 cm deep - anchoring the wardrobe) and I would not like to drill any cables.

retrofood · Accepted Answer

Not bunglers, really. There used to be other regulations (which didn't necessarily govern all such details) and around 50 years ago, this was the standard. Added after 3 [minutes]: And are you sure you can put such a mass on the ceiling? Because there are surprises. My neighbor removed a brick pillar in the kitchen because it interfered with arranging furniture and was only happy until the failure in the apartment upstairs, because it turned out that the cause was the deflection of the ceiling, which lacked support. Different things are happening. The question is also whether by forging 12 cm, you will not look into the neighbor from below. Do you know the structure of the ceiling? I would be afraid to do such work without the consent of the administration.

mczapski · Accepted Answer

Yes, as a fellow moderator wrote. The principle of powering sockets by running cables in the floor was standard. And certainly where the sockets are attached to the floor. The cable runs in a loop (beginning and ending at the fuses) and in diagonal zigzags between the sockets.

78db78 · Answer

And why do you need a 12 cm hole under the wardrobe, which almost stands alone, sometimes bunglers ran cables on the floor that power the neighbor's chandelier downstairs.

palmus · Answer

Drill and that's it. There's a slim chance you'll step on a mine.

kokapetyl · Answer

I don't want to be smart, but it's easier to send someone else on a mine than to step on one yourself.

ron777888 · Answer

It's a gun locker.

ta_tar · Answer

Large holes means how many fi? I also drilled three holes fi 12 to a depth of about 15 centimeters and did not even hit the second plate, i.e. the ceiling plate of the neighbor from the bottom (I certainly did not drill into it).

palmus · Answer

It is disproportionately more likely to hit wires, pipes, etc. in the wall than in the floor. I assume that the ceiling there is thicker than 12 cm anyway. Do gun laws say 10-12 cm?

ron777888 · Answer

I just don't know completely. You're right - first I'll talk about it with someone from the cooperative and then I'll start assembling. I didn't think it could be that problematic, good thing I asked :) Fi will be 10 or 12 most likely. It's hard to say how thick these slabs are for me, probably thick, it's a 15-storey block. Absolutely not, to be honest you don't need to anchor at all as far as I know, but I prefer to be prepared for hardworking and determined burglars ;) Thanks for all the replies!

palmus · Answer

If the building has 15 floors, the ceilings are poured or assembled from Żerański slabs. The latter will be about 24cn. I don't think that poured ceilings are less than 15 cm.

ta_tar · Answer

As far as I remember the construction from the early 1980s, my block of flats has two ceiling slabs. But there was a mass of types of this construction and each construction depended on the height of the building and the period of construction.

palmus · Answer

If you make 5 screws fi 12 to a depth of 50-80mm in the ceiling, in solid concrete it will be impossible to pull out.

retrofood · Answer

Agreed, but the remaining few cm can chip, that's what I meant.

Łukasz-O · Answer

To be honest, I have not come across cast ceilings in a typical large slab. The large slab is a prefabricated structure. They used floor slabs, which, as you write, were about 24 cm: link And there is also a spout, which is at least 5 cm. I wouldn't worry about drilling in the author's place.

ArturAVS · Answer

Me too Wires, if any, are at the very edge with the wall, or in the middle of the room inside the hole in the plate to the neighbor's chandelier from below. As mentioned above; chemical anchors or dowels and unmovable without heavy equipment. In the block where I lived, there was about 1 cm of soft fibreboard on the slab and 2 cm of screed on top of it (I was breaking through to my own basement below ).

retrofood · Answer

In the blocks erected in that period, nothing can and should not be surprising. The imagination of the builders had no limits. The brother-in-law in his apartment had the space between the windows filled with plastered cement bags. It wasn't until the winter that he checked why there was so much wind from the windows. Renovation in the spring.

ta_tar · Answer

I had the same only in the corners, where the CO risers passed. Even a stupid curtain rod - rails (then they were fashionable on the ceiling) could not be hung, and here the apartment was already painted.

palmus · Answer

He can still meet under the screed insulating roofing felt, of course, sloppily laid.

ta_tar · Answer

And facing the wall, but it was all cut off during the first removal of PVC wall strips (the floor was dominated by PVC tiles from the People's Republic of Poland).

retrofood · Answer

It didn't stick to my wall. It ended 5 cm from the wall. On the floor. So the isolation was more than illusory.

DEDMAN · Answer

when it comes to the armored cabinet for weapons, I anchored it at the corner walls with 2x backs Fi 10 and 2 floors max 10cm deep and there were no problems; a great slab of the 80s. Anyway, the recipe says that the furniture must be fixed permanently and have a given class, but it is not specified how, so even a dowel 6 would be good THEORETICALLY

Can you drill into the floor of a prefabricated block of flats?

Post #1

Post #2

Post #3

Post #4

Post #5

Post #6

Post #7

Post #8

Post #9

Post #10

Post #11

Post #12

Post #13

Post #14

Post #15

Post #16

Post #17

Post #18

Post #19

Post #20

Post #21

Post #22

Topic summary