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Reinforced concrete floor above the basement

Recently I bought a home. The former owner turned out to be a decent person and immediately warned me that the boards, of which the floor above the basement was made, had rotted from time and moisture and required urgent replacement. He was probably afraid that at one point I might fail there. The basement itself was in a house under the kitchen and had the following dimensions: width — 2.4 m, length — 2.3 m. Inside it was lined with brick and smeared with a layer of clay. The floor above it lay on two wooden beams and consisted of boards and bedded on top of the chipboard. It was made crooked and spoiled to such an extent that walking on it was really dangerous. All wood was beaten by woodworm beetles, and some of the chipboard plates damp and became loose. At first I expected to just replace the boards on it, but then, slowly taking it into my head, decided to make a metal frame and pour it with concrete. Firstly, in the basement there will always be dampness, whatever one may say, which means that new boards, given the current quality of the forest, will definitely not be enough for a long time, secondly, if we doit is safe, once and for all, and what could be stronger than reinforced concrete? Dismantling the old floor First of all, it was necessary to remove the chipboard, and then the boards. With the help of a nail, a hammer and a crowbar, I managed to do it in three hours. There were no problems with the plates, but it took more time to disassemble the boards: they were nailed to the beams with huge nails, so they came off with great difficulty. After the wooden flooring was completely removed, I had to remove a decent layer of earth (one bayonet) around the perimeter near the walls in order to remove all existing irregularities and plan the surface. This case took the rest of the day. The next morning, the welding work was ahead. Making the frame I did not regret the production of the frame. Perhaps, he used it even more than necessary, but only in order not to put additional pillars-pillars inside the cellar, reducing its free space. The basis of the design was made of thick-walled pipes (? 61 mm, wall thickness 5 mm), which I did not even have to buy. The fact is that earlier from them heating was done in the house.It looked awful, cumbersome, so it is only natural that I removed all this iron from the rooms, replacing it with modern heating appliances. And pipes, as you can see, were useful for the basement.
 floor frame
 floor frame
First, I evenly distributed four powerful three-meter pipes that are beams, over the pit cellar (after 80 cm). Then, putting them exactly on the level, he began to weld them among themselves. For this I needed pipes of smaller diameter (? 32 mm - 12 m) and thick reinforcement (? 12 mm - 40 m). First of all, I welded 15 bridges between the beams, after which I tightened the whole structure with reinforcing rods welded to them from below. The result was a very reliable metal frame. Separately, I would like to dwell on the manufacture of the frame framing the entrance to the basement. I made it from a 40/20 mm shaped pipe in the shape of a rectangle (length - 70 cm, width - 50 cm). What is there to pay attention to? Firstly, all the corners of the frame must be perfectly straight, the dimensions of the sides are strictly maintained, otherwise the lid will enter it loosely, and it will appear from the cellar.Secondly, it should be welded in such a way that it is at the same height as the pipe-beams, which are also beacons. The lid itself was also made by me from a profile pipe (40/20 mm) and a thick piece of plywood, securely connected to its metal base with self-tapping screws. A stop for the cover, excluding the possibility of its falling into the basement, served as a corner welded to the underside of the framing frame. That day I worked with welding from the heart: from the very morning until late at night, but I still finished the job. Some electrodes burned almost two packs, and acrid smoke inhaled - horror! (there were pipes in the paint). Installation of formwork The metal frame was ready, but now I had to solve a new task - to mount the formwork above the cellar. Were considered various options for its manufacture, but in the end my choice fell on the chipboard, which were removed from the old floor. Why? First, it was easier and faster to close a large space above the pit, and secondly, there were practically no cracks where liquid concrete could spill. I fastened them to the frame on the underside with thick knitting wire: first I drilled it with a drillChipboard holes, then threaded the wire through them, after which it was fastened with pliers tightly to the fixture. It turned out reliably, but, given the gravity of the concrete, I just in case put several temporary supports at the bottom. Filling the floor Working with concrete is a serious test, especially if in one day required to concrete 12 m? at a layer thickness of 10 cm. For this reason, I called for help from a friend, after preparing everything necessary for this business: sifting gravel, cement, a trough for mixing, shovels, a bucket, a rule. We were distributed like this: we mixed the concrete together (in 1/5 ratio), then one brought it to the pouring place in buckets and poured it out, and the other level the finished mixture with the three-meter rule, tightly pressing it to the beacons and making them frequent oscillatory movements to the side.
Fill sex
 Fill the floor
The two of us worked on the hunt. Having started working at eight o'clock in the morning, by lunchtime we had already finished pouring. The result pleased. The floor went smooth, and the whole room was immediately transformed. Two days later, when it was already possible to walk on the concrete, I took an old car drive and, making circular motions of it on the floor surface, removed small irregularities from it.Now it only remained to wait for the concrete to dry completely. Final chord A week passed and I began the final work. First of all, copiously painted the dried concrete surface with a primer. But not for beauty, no, but to reduce the amount of dust that inevitably forms when walking. When the paint is dry, put a waterproofing film on the floor to prevent the penetration of moisture from the concrete into the linoleum. After that, as you already guessed, linoleum was laid, but not simple, but thick, insulated, with an abrasion resistant surface that is not afraid of even dragging furniture over it. Expensive pleasure (the price per meter is about 2 thousand rubles), but believe me, it is worth the money spent.
 Reinforced concrete floor above the basement
 Reinforced concrete floor above the basement
 Reinforced concrete floor above the basement
I trimmed the entrance to the basement and the lid itself with a decorative metal corner.It turned out neatly and beautifully: under the corner managed to hide the unevenly cut edges of the linoleum, besides, he pressed them tightly to the surface. I made the handle for the cover not ordinary, but removable, so that it does not interfere with walking. To do this, drilled the lid on the center, from the back side of it, screwed the metal plate, to which point a conventional nut was welded. Under it, I made a special key, which is a small twig with a thread and a knob at the end.
 Reinforced concrete floor above the basement
 Installing the formwork

Reinforced concrete floor above the basement
 Reinforced concrete floor above the basement
Reinforced concrete floor over basement
 Reinforced concrete floor above the basement
>img src="https://sdelaysam-svoimirukami.ru/images/11/1137-zhelezobetonnyy-pol-nad-podvalom.jpg" alt="Reinforced concrete floor above the basement" title="Reinforced concrete naya floor above the basement ">
Reinforced concrete floor above the basement
 Reinforced concrete floor above the basement
Now, to go down to the basement, it was enough to take the key, insert put it in the hole, then screw it on the nut and lift the cap. Agree, an interesting decision, and most importantly - nothing superfluous on the floor. The hole itself, when the key was removed, was closed with a plastic furniture stopper. Here, it seems, and everything, dear readers, if you have any questions about the article, I hope that the photos I have taken will help you to understand the details. [/L_REPEAT]

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