The technology of replacing rotten wooden beams in a brick house with monolithic floors

In many cities, there are old buildings that have wooden floors. From old age or with water leaks, they are destroyed in a hundred years and the building is recognized as emergency. Although, brick walls can last as long. In many cities there are such houses without internal ceilings that cannot be demolished due to the fact that they are an object of cultural heritage, and local builders do not know the technologies of reconstruction and installation inside overlaps.

The most common option for the reconstruction of such old buildings is to install a massive channel instead of wooden beams, lay a profiled sheet and pour concrete. The channel has a large mass and its installation is difficult for large spans. Moreover, the height (thickness) of such floors will eat up part of the height in the premises.

I propose to look at one interesting example of how, using the technology of often-ribbed monolithic floors with aerated concrete filling, you can get light, durable floors with a flat ceiling and floors.

Old housing stock somewhere in St. Petersburg. If the house is in the center, then the cost of apartments is high and it makes sense to make major repairs. It can be seen that a channel was installed instead of beams, but since the height of the ceilings of the upper floor is too low, it ate up the space too much. It was decided to install a monolithic ceiling with a height of 250 mm.

We used the technology of often ribbed monolithic slabs of the MARCO company. They produce beams consisting of a base made of galvanized sheet, inside which a reinforcing cage is laid (two at the bottom and one bar at the top). The section of reinforcement for the length of each span is calculated.

The beams are recessed into the walls by 150 mm and are supported from below by supports. Blocks of aerated concrete 200 mm wide (on the side) are laid between the beams. The spacing of the beams is about 600 mm. The area is lined with a reinforcement mesh, communications or pipes of warm floors are laid out and the floors are poured with the help of a concrete pump. Final view:

Installation is done quickly enough. Lightweight beams, no need for cranes or hoists, winches. Many private developers also install floors in their houses using this technology. Mainly in the suburbs (geography of the company).

What are the advantages of this technology? This is the speed of installation, lightness and simultaneous strength of the floors (600 kg / m2). A large volume of two layers of reinforcement is not needed, as is the case with solid monolithic ceilings, plywood for formwork and a large number of supports are not needed. Installation of CHRMP can be in any configuration of the house. Any self-builder can use ready-made technical solutions of the company.

If this topic is interesting for private houses - write in the comments, I will show in examples how it is used there. It is mainly used in private housing construction. And this reconstruction in a multi-storey building is a special case.

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