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The results of the government investigation into the collapse of the I-Park apartment complex in Gwangju in January were announced.
There were three major faults: unauthorized design changes, use of poor quality concrete, and poor construction management.
This is reporter Nam Seung-mo's report.
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Ministry of Land, Infrastructure and Transport announced the results of the investigation into the Gwangju I-Park collapse two months after the accident.
There are three main causes.
The first analyzed that the construction method was originally designed and changed at will.
When concrete was poured on the 39th floor construction site where the apartment was starting to crumble, the design had to install a support called a dongbari on the lower floor, but it didn't.
At the same time, it was analyzed that the load on the concrete increased more than twice the level expected at the time of design, and it was analyzed that it was concentrated in the center of the floor, leading to collapse.
Here, it was found that the lower floors collapsed at the same time as the Dongbari, which had to be installed continuously on the three floors below by design, was removed in advance.
Second, the concrete was also of poor quality.
As a result of the test, the concrete strength of 15 of the specimens taken from a total of 17 floors was at a non-passing level.
The investigation committee found that the concrete had been mixed with water at the site, and even that was not properly hardened and used.
Finally, the Presidium, which was supposed to identify and stop these problems, did not do their job well.
The construction was approved afterwards without knowing that the members of the problem had disappeared, and the concrete problem was not properly inspected.
The Ministry of Land, Infrastructure and Transport explained that it would demand strict measures from relevant agencies for illegal matters, and that it would come up with measures to prevent recurrence.