What is the reason for the collapse of a self-built house in Changsha? What are the signs before the house collapses?

According to related news reports, a building collapsed in Wangcheng District, Changsha City, Hunan Province. The collapse of the self-built building caused 23 people to be trapped and 39 people lost contact. The rescue team for the building collapse accident has rescued five trapped people, all of whom were taken to hospital for treatment.

In addition, according to CCTV news, the collapsed building is located near the north gate of Changsha Medical College. It is a six-and-a-half-story brick-concrete building with a building area of about 800 square meters. The first floor to the sixth floor is rented for commercial purposes, including shops, cinemas, hotels and so on. More than six floors are occupied houses.

The reason for the collapse of this self-built house: According to the information screen about the building dug up by netizens, the 20 14 Baidu street view shows that the building is only five stories high. But the photos at the time of the incident showed that the building had six floors, and there was an attic above the sixth floor.

This kind of heightening on the original basis seriously increases the bearing burden of the original bearing beam, and at the same time has a destructive impact on the bearing capacity of the foundation, which belongs to illegal buildings. This is the most fundamental reason for the collapse of the building.

Before the building collapses, there will be the following signs: 1, the ground sinks, hollows and cracks; The load-bearing columns, beams and walls of buildings will also have the characteristics of cracks, inclination and bending, which will become more and more obvious and serious.

2. Bearing columns, beams and walls are deformed due to excessive bearing, and decayed parts will appear.

3. The external wall of the building suddenly peeled off and fell off in a large area. There are abnormal sounds in and around the building.

Many owners of self-built buildings and houses rebuild and add their own buildings and houses at will for economic benefits, ignoring safety, which leads to the collapse of buildings. For this kind of illegal building, we must adopt the payment method of hell. I hope that every homeowner will not illegally rebuild his own building, and I hope that people and themselves will attach importance to legality and safety.