On September 16, 2022, a fire broke out on the exterior wall of China Telecom Hunan's He Garden Telecom Building in Changsha, Hunan Province, where a blazing fire burned fiercely, sparking social concern.
Before the fire, the telecom building fire hazards have precursors. In August of this year, China Telecom Corporation Hunan Branch had issued a tender notice on the building fire maintenance project mentioned: 'At present, the Lotus Garden Building fire fighting equipment has overrun, part of the equipment does not comply with the current national standards and norms, the fire alarm system, smoke evacuation system there are still large safety hazards.'
According to media reports, the incident telecom building was built in 2000, located in Changsha City, East Second Ring, had become the first building in Changsha to break through 200 meters with a height of 218 meters, the fire or the external wall insulation materials caught fire. When a fire occurs, in addition to the fire, the fire upward speed is also very fast, in the high-rise building fire tends to be a short period of time the fire will quickly spread upward which stems from the formation of high-rise buildings, 'chimney effect'.
In 2011, the Ministry of Public Security issued Public Fire Protection Document No. 65, before the civil building insulation materials are mostly flammable and combustible materials. Since then, after exploration and consultation, in 2014, the Ministry of Housing and Construction issued the national standard 'building design fire code', once again, China's building internal and external insulation system must use non-combustible or combustible materials to make clear provisions: the relevant provisions require that the height of the building is greater than or equal to 100 meters, and the combustion performance of its thermal insulation materials should be A class. In high-rise buildings, the external thermal insulation materials are divided into A (non-combustible), B1 (flame retardant), B2 (combustible), B3 (flammable) grade based on combustion performance.
Ankang fireproof board independently developed by Anbian New Materials Group is a new inorganic new material, the combustion grade is the highest level of non-combustible grade A1, can withstand high temperatures of 1200 ℃ without carbonization, the fire resistance limit of up to 4 hours, is the preferred choice of fireproof material for the building fire protection system, and is widely used in the fire blocking between layers of the glass curtain wall, fireproof cladding of the steel structure, fire ducts and other scenarios.
Dansn glass curtain wall interlayer fire blocking is combined with the comprehensive superiority of Ankang fireproof board under the premise of meeting the 'Technical Code for Glass Curtain Wall Engineering' and 'Code for Fire Protection of Architectural Design', and it is formed by the combination of A1 non-combustible fireproofing material, Ankang board, and fireproof heat preservation material, which has a superb fireproofing ability, and it can effectively prevent the flames from escaping upwards in the case of a fire.
Fire blocking between floors of glass curtain wall by Dansn
Glass curtain wall interlayer fire blocking has a strong fire resistance performance, can withstand high temperatures of 1200 degrees Celsius does not carbonize, single plate fire-resistant up to 2-4 hours, the material is non-formaldehyde and non-toxic, formaldehyde grade for the highest ENF non-formaldehyde grade, smoke toxicity for the highest level of low AQ1 level, belongs to the real environmental protection plate, while the performance is stable, the traditional galvanized steel is easy to rust, the performance of Ankang plate is stable, and the building of the same life.
In addition to the glass curtain wall, Ankang fireproof board is also used in steel structure fireproof cladding system, under the premise of meeting the 'Building Design Fire Code', Anbian steel structure fireproof cladding adopts Class A fireproof material Ankang fireproof board to carry out the overall box cladding on steel, which can effectively prevent the steel beam from warming up too fast, keep the yield strength of the steel beam, and give play to the steel structure system with light deadweight, quick installation and strong seismic characteristics, which can provide a safe evacuation, fire fighting and rescue. Safe evacuation, fire-fighting and rescue to win enough time. Instead of traditional spraying fireproof coating, it has various programs from 1.5 hours to 3 hours.
Fire sealing between layers of glass curtain wall by Ambion
The Changsha Telecom building fire incident, also gave us a wake-up call, crack the fire of ultra-high-rise buildings, 'fire prevention is better than fire', in the building design stage must do a good job of fire prevention measures, insulation materials need to be class A non-combustible materials, layer to do a good job of fireproofing blocking, fire escapes to do a good job of the fire door for high-rise buildings plus the 'safety locks'.