Otherwise, there is no place to build the prefabricated panels.
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This floor is relatively low and may have been built earlier
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Background check before the collapse 2 after the collapse 2.1 Construction history investigation From photos 2.1-1 and 2.1-2, it can be seen that the layout of the external facades of the three floors at the bottom of the structure is the same, the external facades of the four to five floors are different from the layout of the first to three floors below, the sixth floor is the second addition, and the seventh, eighth and ninth floors in some parts are the third addition.
2) At the bottom of the third floor wall, there is a secondary beam that overlaps with the second floor main beam, and the secondary beam is overlapped with prefabricated panels.
4) On the third floor, it is obvious that there are prefabricated panels, and the east-west beams on the third and fourth floors still exist.
The fourth house lacks structural columns and the ring beams are not closed.
The first floor is a storefront, the second floor is a restaurant, the third floor is a private cinema, the fourth, fifth, and sixth floors are family hotels, and the seventh, eighth, and ninth floors are self occupied houses.
Home construction often shows similar structural systems and similar construction processes.
Photo 2.1-1 Original Structure Photo 2.1-2 Additional Structure 2.2 Local Architectural Tradition Investigation Each region has its own architectural tradition, and residents learn from each other, which is often built by the same group of builders.
After investigation, the collapsed house was built by residents themselves, with a total of 9 floors.
Photos 2.2-1~4 show a newly built house located at the end of the street where the house is located: 1) There are two windows on the front of the first and second floors, with east-west beams supporting the walls on both sides.
5) Using balcony beams as load-bearing beams for walls results in a chaotic structural system.
3) Three story residential buildings add walls on the secondary and main beams, and the line load of the walls is transmitted to the east-west beams through the secondary beams, which in turn transmit to the walls on both sides.
Photos 2.2-1 Photos 2.2-2 Photos 2.2-3 Photos 2.2-4 Photos 2.2-1~4 Similar houses on this street Photos 2.2-5~8 show several houses near the street where the collapsed house was located: 1) The first three houses among the four houses used ring beams and structural columns, and the walls were divided into rectangular blocks.
Star logo setting: enter the home page of the official account, click “…” in the upper right corner, click “Set as star logo”, and a yellow Pentagram will appear next to the public account name (the same operation for Android and iOS users) 1 Basic information At 12:24 on April 29, 2022, Panshuwan, Jinping Community, Jinshanqiao Street Road, Wangcheng District, Changsha, Hunan Province, a collapse accident occurred to a resident’s house built by himself, killing 53 people in total.
