<Anchor> It



is stipulated to install ventilation facilities to prevent the spread of smoke in case of fire in buildings of a certain size or larger. However, upon inspection of the site, there were few facilities that were only installed and operated properly according to the standards.



Reporter Nam Hyo-joo of TBC reports exclusively.



<Reporter> This



is the basement of an apartment building in Buk-gu, Daegu.



A large blower machine that you can see when you open the door is a device that supplies air to the apartment hallway in the event of a fire, preventing smoke from spreading into the hallway and emergency stairs.



If so, is it working properly, the differential pressure gauge goes up when the equipment is turned on?



However, it is only half of the legal minimum standard of 40Pa.



In this case, when the fire breaks out, all the smoke will leak into the hallway.



I tried operating the ventilation system installed at another apartment site.



You can see the differential pressure gauge rising rapidly, rising to a maximum of 120Pa, but the house door does not open properly this time when the pressure becomes excessively high.



You can't evacuate.



[The door does not open.]



This time, I measured the wind speed.



When the emergency stair door opened, the wind blew at more than 2 m/s.



It is more than twice the KS certification standard, but the emergency stair door does not close properly in the wind.



The problem is that if the stairwell door doesn't close like this, all the smoke will leak out into the stairwell, increasing the risk of suffocation.



[Lee Taek-gu/President of Korea Firefighting Facility Managers Association: If smoke enters the stairwell without evacuation, the smoke control system is there, but it is mana.] The



reporters obtained a report from the fire department on the results of inspection of smoke control facilities in buildings with ventilation facilities in Daegu and Gyeongsangbuk-do. I compared years.



In Daegu, 432 out of 504 locations, or 86%, and in Gyeongbuk, 77 out of 80, 96%, were found to be unsuitable for smoke-proof wind speed.



8% of Daegu and 20% of Gyeongbuk did not meet the foreclosure standards.



It is pointed out that a thorough investigation and strengthening of related laws are necessary.



(Video coverage: Koh Seung-seung TBC, CG: Kwak Ho-gi and Byun Hyeong-il TBC)