Why is there a horizontal crack on the third floor of the building?

There can be a number of reasons for a lateral crack on the third floor of a building, depending on the nature and location of the crack. Here are some possible reasons:

1.Uneven settlement of foundations: If the foundation of a building is not strong, it may sink due to the gravity of the building itself, especially in areas with poor soil conditions. If this settlement is uneven, it can lead to cracking of the floor slab.

2.Temperature change: Thermal expansion and contraction are the basic physical properties of the vast majority of objects.

If the expansion and contraction of a building is not uniformly constrained, for example if part of the structure is exposed to sunlight while another part is in shade, this can cause temperature stresses to exceed the strength of the masonry, causing masonry cracking.

3.Concrete quality problems: If the ratio of concrete is unreasonable, or the mixing is uneven, etc., it may lead to cracks in the floor slab.

4.Construction measures are not in place: In the process of construction, if the weight of the steel bar and concrete is not effectively transmitted to the formwork under the floor slab, or the support under the formwork is not firm, it may lead to the sinking of the whole and eventually lead to the cracking of the concrete.

5.Unreasonable removal time for the lower part of the floor slab: After pouring concrete, if the support of the lower part of the floor slab is not removed at the right time, the concrete will sink and may also cause cracks.

6.Construction reason: If the concrete is poured after the completion of the construction on it without reaching the required curing period, such as stacking materials, etc., these weights are applied to the concrete floor slab, which may also lead to cracking of the floor slab.

Please note that the above are only possible causes of lateral cracks on the third floor of the building, and the specific causes need to be diagnosed according to the actual situation. If there is such a crack in the building, it is recommended to consult a professional for repair in time.

There are various reasons for wall cracking, and some cracks are just putty for decoration.

There are problems with the layer, and some cracks are serious problems such as cracking of the building foundation wall, and the methods and measures to deal with them are very different, and the key is to find the root of the problem. Foundations are the most common cause of wall cracking. The first task in this case is to carry out the reinforcement of the sinking foundation to stop the cracks from further expanding.

The general operation is to dig the foundation of the subsidence, and then reinforce the original foundation beam.

Extension, pouring concrete. There are quality problems with the bricks used for load-bearing walls, such as hollow bricks.

Insufficient load-bearing capacity, softening and pulverization of red bricks may lead to cracking of the wall. In this case, load-bearing columns and beams can be poured to support the floor, and then the brick walls can be replaced, and for one- or two-story buildings, the brick walls can not be replaced after the load-bearing columns and beams are added. For high-rise buildings.

It is troublesome to pour additional concrete columns and beams layer by layer, and steel beams can be used for load-bearing support, and then the broken brick walls can be replaced, and then the steel beams can be removed after replacement. Some foundation walls crack due to excessive load-bearing of floor slabs, especially the walls on the top floor. In this case, it only takes too much load to be removed and the wall stops cracking.

The cracking of the wall has been serious enough to endanger the load-bearing main beam, and the main beam body has cracks, so it is best not to live in this case, move out first, assess the risk of dangerous housing and the possibility and cost of repair, once the repair cost is too large and the risk of collapse is high, it is necessary to give up.

Summary. The reasons for this are diverse. There are many reasons for wall cracking, some cracks are just problems with the putty layer of decoration, and some cracks are serious problems such as cracking of the building foundation wall.

If this is the case, contact the property. Let him fix it for you. If you build your own house, then you should find the contractor at that time. Ask him to fix it for you, it's mostly lime cracking or something.

The reasons for this are diverse. There are many reasons for wall cracking, some cracks are just problems with the putty layer of decoration, and some cracks are serious problems such as cracking of the building foundation wall. If this is the case, contact the property.

Let him fix it for you. If you build your own house, then you should find the contractor at that time. Ask him to fix it for you, it's mostly lime cracking or something.

The formation of cracks in the walls of third-floor buildings is often related to the following aspects:

First, the issue of foundation.

Unstable foundation is one of the important causes of wall cracks. If the bearing capacity of the foundation is insufficient or there are problems such as settlement and frost heave, the load of the house will be unevenly distributed, resulting in the squeezing and pulling of the wall of the building, resulting in cracks.

Second, the quality of cement.

Cement quality problems can also lead to cracks in the wall. If the cement used is of poor quality, or in the wrong proportions, shrinkage will occur during the drying process, which will eventually lead to cracks in the wall.

3. Wall structure.

The poor structure of the walls is also a factor in the cracks in the walls of the buildings. The quality of the building materials themselves, the structural combination and the poor construction technology will lead to the instability of the wall structure and the cracks on the wall.

Fourth, the use of the environment.

Ambient temperature, humidity and usage environment are also factors that affect cracks in building walls. The climate is humid, and the water vapor is easy to penetrate into the wall, combined with the temperature change in winter and spring, the water vapor inside the wall will form cracks in the process of shrinkage.

5. Natural disasters.

Natural disasters, such as **, storms, lightning, etc., affect the seismic resistance of the wall, so that cracks appear on the wall. Carry the disadvantages.

In short, there are many reasons for cracks in the walls of buildings, but they must be discovered and treated in time to avoid affecting the floor structure and safety. For the repair of wall cracks, it is also necessary to find the cause of cracks, and solve the problem from the source in order to truly solve the problem of wall cracks.

Summary. Hello dear, there is still a certain danger after the cracking of the floor slab, but it also depends on the cracks of the floor slab, if the cracks of the floor slab are parallel to the beams, then basically there will be no danger, this is still the quality of the floor itself. There is still a certain danger after the cracking of the floor slab, but it also depends on the cracks of the floor slab, if the cracks of the floor slab are parallel to the beams, then basically there will be no danger, this is still the quality of the floor itself.

But if the direction of the floor cracking is opposite to the beam, there is a certain danger, it is easy to lead to the settlement of the house, and the structure of the house may also have some problems, if there is a crack in the floor slab, then we still have to pay attention to the problem, you can find a professional person to repair it, and if the house has some quality problems, it is also very dangerous to live. Thank you for your consultation, I am very happy to answer for you, I hope it can help you, I wish you good health and happiness. <>

Is it dangerous to <> a three-story building, and there are cracks of about one millimeter on each floor?

Hello dear floor slab after cracking, there is still a certain danger, but it also depends on the cracks of the floor slab, if the posture crack of the floor slab is a crack parallel to the beam, then basically there will be no danger, this is still the quality of the floor itself. There is still a certain danger after the cracking of the floor slab, but it also depends on the cracks of the floor slab, if the cracks of the floor slab are parallel to the beams, then basically there will be no danger, this is still the quality of the floor itself. But if the direction of the floor cracking is opposite to the beam, there is a certain danger, it is easy to lead to the settlement of the house, and the structure of the house may also have some problems, if there is a crack in the floor slab, then we still have to pay attention to the problem, you can find a professional to come to repair, and if the house has some quality problems, it is also very dangerous to live.

<> cracks are irregular.

It's dangerous to be pro-this.

What could cause such a situation?

Maybe I didn't get it done when I built the building.

Reasons: 1. Irregular longitudinal and transverse cracks appear on the roof, indicating that the floor slab of the house is a cast-in-place concrete floor slab.

2. Commercial concrete (commercial concrete) is generally fine, and cracks will occur because of uneven vibration during construction.

3. Check the crack depth, less than 1 cm, treat it with your own plain cement, and find an expert if it is larger.

Note: First, the advantages of prefabricated slabs are that the formwork is provincial, the construction period is short, and the cost is low, so a large number of precast concrete slabs are used as floor or floor slabs in industrial and civil buildings. However, buildings built with prefabricated panels also have fatal shortcomings, that is, poor seismic performance, and the board surface is easy to crack, especially in the room slabs and door openings of large bays.

Thus affecting the living effect.

Second, if it is a crack perpendicular to the length of the prefabricated slab, the prefabricated slab must be knocked off, the slab has been broken and there is a danger to life, the broken slab can be knocked off, and the prefabricated slab on both sides is re-poured with a hanging mold to solve the problem.

3. There is no major problem with the long side of the prediction plate, and the long crack between the plates is a common quality problem, usually the concrete of the plate joints is not solidified, and the early cracks are caused by heavy loads.

Your problem is not very clear, and it is not clear how many layers are cracked.

Seams, whether they are load-bearing walls, as well as structures and so on, I can only give you the approximate reasons. Structural cracks are cracks caused by upper loads, indicating that the bearing capacity of the wall is insufficient or there is a big problem.

If there are cracks in the upper 2 floors because of the poor quality of your masonry construction, the ash is not full during the wall masonry, the thickness is uneven, the assembly method does not meet the requirements, etc., when the brick wall is built, the bricks are not wet, and the use of dry bricks on the wall will reduce the bearing capacity of the masonry, so that the wall will have cracks in the future, etc

In the lower layer, various pipelines may be buried to pass through the wall, which destroys the integrity of the wall, reduces the bearing area of the wall, weakens the bearing capacity of the wall, and causes cracks in the wall. If your house is repurposed before the house is repurposed, there is a wall on top of the room, which increases the use load or increases the vibration force, so that the wall is damaged, causing cracks in the wall (you can understand the excess load).

Let's give you advice to see if you can make the beams heavy, or rebuild the columns to share the overall load of the house.

I'll tell you about it! If it is due to structural reasons (unable to bear weight), it is recommended not to cover it, it is very dangerous.

There are a lot of transverse cracks on the second floor, a transverse crack under the front window and the rear window, so scared.