Why did the roof collapse in an underground parking lot follow?... "Structural problems."

[Anchor]
During the heavy snow, there were a series of accidents where the roof collapsed due to the entrance and exit of the underground parking lot.

Moisturized snow and heavy wet snow are some of the reasons, but experts point to fundamental structural problems.

Reporter Kwon Junsu reports.

[Reporter]
The roof collapsed as if it were split in half due to the access to the underground parking lot of the apartment.The vehicle immediately below

almost hit me, but I almost got hurt by the protruding steel frame.

The roof of the passageway of the underground parking lot at the nearby health center also collapsed in the middle and blocked the entrance.

[A victim health center official: I think it was the first time (the collapse) happened. While I was working.]

Similar reports flooded YTN during the two days of heavy snow.

Residents who could not pull out their cars complained of inconvenience because the ceiling of the passage to the underground parking lot collapsed in Pyeongtaek, Anyang, Yongin, Siheung and Incheon, Gyeonggi Province.

Experts point to structural problems.

Most of them are 'canopy' and have a gentle cylindrical shape, but in this case, snow may not flow down easily.

The heavier-than-usual wet snow does not fall to the floor and continues to build on the roof, so it seems that it would have been difficult to bear the weight.
Analysts say that if the triangular roof of a snowy place like
Northern Europe had been modeled, the amount and weight of accumulation would have been reduced.

It is also a way to support thick steel frames closely along the shape of the roof.

[Ham Eun-gu / Professor of Safety Engineering at Eulji University : It's like a canopy, so it's hard to build a pillar in the middle of an underground parking lot.... To put it in a thicker and tighter way, you have to distribute the load.]

If snow is forecast to fall more than 20cm, it is recommended to remove the snow from time to time, but experts advise that you should be careful because there is a high risk of collapse if you climb onto the roof with a pile of snow.

I'm YTN Kwon Junsu.