The company "Carcass Komplekt" had tested a fragment of the ceiling for fire resistance in the "Fire Certification Laboratory". Tests were carried out at a load of 200 kg per square meter. During the test there was a "standard fire mode" in the fire chamber of the furnace, (in accordance with the requirements of GOST 30247.0). According to the test results, the limit of the ceiling sample for the fire resistance was REI 60.