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A video of the situation just before the accident was released. On the top floor of the building, the sunken floor was captured on the screen.
This is KBC reporter Shin Min-ji.
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With a dull sound, the concrete mold opens and opens its mouth.
Without stopping, concrete that has not hardened begins pouring down.
The continuous sound of the worker's lament, and the appearance of the formwork seen from the front.
The floor, which should be leveled, is dented underneath and is in danger.
Even the average person can see that something is wrong.
This video is a video of a worker at a construction site on the top floor of an apartment building pouring concrete on the floor 10 minutes before the collapse of the apartment building in Hwajeong-dong, Gwangju on the 11th.
It is presumed that it was taken to report an unusual on-site situation to the manager.
The expert who saw the video judged that the crack in the formwork, estimated to be at least 10 cm tall, was most likely a sign of collapse.
[Lee Song-gyu / President of Korea Safety Experts Association: If you look at the situation in the middle right now, the collapse is starting. Any number of people should see this and run away. I need to evacuate. Because this cannot happen. It's a very dangerous situation.]
Even the workers who actually filmed the video were surprised and hurriedly evacuated by the stairs.
While it is pointed out that the cause of the apartment collapse in Hwajeong-dong, Gwangju may be a defect in the concrete curing process, attention is being paid to whether the video 10 minutes before the accident will be the key to identifying the cause of the accident.