1, by name
It can be divided into residential buildings and public buildings. As the name implies, residential building is a kind of building whose main function is crowd living. Mainly civil houses, such as residential quarters and apartments. Public high-rise buildings are buildings with public facilities, such as hospitals, department stores, exhibition halls, museums, hotels, libraries and so on.
2, according to the level.
According to the hierarchy, it can be divided into the following categories, mainly residential buildings. When the height of a residential building is 19 stories, or exceeds 19 stories, this building is called a high-rise building. Residential buildings from 18 to 18 are called Class II buildings. The buildings below 10 are Class III buildings.
3, according to the public * * * building points
Public buildings with a height of more than 50m are classified as Class I buildings. Buildings with a height of less than 50m belong to Class II buildings.
Characteristics of high-rise buildings
1, the fire spread quickly.
There are many stairwells, elevator shafts, pipe shafts, air ducts, cable shafts and other shafts in high-rise buildings. If the fire separation is not handled properly, it will become a way for the fire to spread rapidly, just like a towering chimney in the event of a fire.
2. Difficulty in evacuation
Many floors, long vertical distance, and long time to evacuate to the ground or other safe places; Concentration of personnel; In case of fire, the fire and smoke spread rapidly due to the smooth air flow in each shaft.
3. It's hard to recover.
High-rise buildings are as high as tens of meters or even hundreds of meters, so it is quite difficult to put out fires from the outside. Generally speaking, it should be based on self-help, that is, indoor fire-fighting facilities. The fire protection facilities of most high-rise buildings are not perfect, so it is often difficult to put out fires in high-rise buildings.