According to the measurement, the wind speed at 10m above the building is 5m/s; Wind speed at 30m is 8.7m/s; The wind speed at 60m height is 12.3m/s; The wind speed at the height of 90m is 15m/s.
Second, when the fire source is determined and the fire situation is controllable, do not panic.
At that time, flammable and combustible materials such as polystyrene foam board or polyurethane hard foam were mostly used.
(statement: “the wechat official account of Guiyang County Science and Technology Association” publishes this article for the purpose of conveying more information.
Why are high-rise buildings so deadly? Simply understand the three characteristics of such fires 👇 Flammable and combustible external insulation materials Flammable and combustible external insulation materials have become an important accomplice in high-rise building fires.
Block the door with clothes, sheets, etc., splash water to cool down and prevent smoke.
“Chimney effect” refers to the phenomenon that indoor air rises or falls along the space with vertical gradient, resulting in enhanced air convection.
On the afternoon of September 16, a fire broke out in Changsha Hehuayuan Telecom Building, with smoke billowing and dozens of floors burning violently.
Fortunately, the fire rescue personnel quickly controlled and put out the fire after arriving at the scene, and there were no casualties on the scene.
Key 2: Back off in case of thick smoke.
This is the best “self rescue” source: Hunan Fire, Yueyang Fire Changsha fire protection, news seeking truth, etc.
“Wind assisted fire” and “wind assisted fire” make it difficult to control high-rise building fires.
Close the fire door when passing the stairwell.
China began to implement the building energy conservation policy in 2005, and one of the main measures was to increase the thermal insulation layer on the external wall.
If the fire is obviously out of control, you can follow the “three keys” to escape and save yourself.
As the wind speed is faster when it is higher, the wind will often help the fire, and the fire will burn more and more vigorously.
The kitchen, balcony, and corridor should be cleaned regularly to prevent the occurrence of fire at the root.
Residential buildings with a building height of more than 27m and non single storey factories, warehouses and other civil buildings with a building height of more than 24m are high-rise buildings.
The fire protection refuge floor can not be occupied by people and sundries.
How to escape from a high-rise fire? First, please call the fire alarm number “119” immediately and press the fire alarm button as soon as possible to warn other residents when conditions permit.
If the door lock temperature is very high or there is thick smoke when opening the door, you should back off.
However, high rise buildings are huge in size, complex in function, densely populated, and have many hazards Once the fire load is large, it is still difficult to evacuate people and put out the fire.
How to “escape” is also a skill everyone should know and master.
Evacuate to the room far away from the fire floor as soon as possible, close the fire door in the stairwell, and press “Key 2” to retreat for help.).
Use the surrounding fire extinguishers Fire hydrant and other fire-fighting facilities and equipment can help to put out a fire at the beginning.
According to the data from the Fire Rescue Bureau of the Emergency Management Department, 4057 high-rise building fires were reported in 2021, causing 168 deaths, an increase of 22.6% over the previous year.
When escape is blocked, people can evacuate to the nearest refuge floor.
Due to the lack of understanding of the dangers of the external wall thermal insulation materials in the past, there was no clear regulation on the combustion performance of the materials.
How can we quickly identify the refuge layer when escaping? You can understand it with a picture 👇 There are also three points to note about the escape of high-rise buildings: in addition, in daily life and work, we must be careful to use electrical equipment to ensure that people walk through the valve evacuation channel, emergency exit, and fire truck channel to ensure that they are unblocked.
According to the current operation requirements of the 50 meter ladder fire rescue truck in China, the height between the first floor and the first refuge floor is not more than 50 meters, so that the ladder truck can be used for rescue.
It is equipped with fire hydrants, fire telephone, air supply system, automatic sprinkler system, broadcast system and other fire-fighting facilities.
High rise buildings have strict fire safety requirements and fire protection design during construction.
The function of the refuge layer is for the personnel to avoid the fire, prevent the smoke from entering and causing damage to the personnel, and wait for the firefighters to come to the scene for rescue.
can effectively prevent and control fires.
First, touch the door lock before opening the door quickly without smoke.
After a fire occurs in a high-rise building, smoke will spread vertically through the stairwell, pipe shaft, glass curtain wall gap and other parts at a speed of 3-4 m/s, which can quickly ignite the whole building.
At the same time, dial “119” to report important location information such as the trapped floor and room, and send out a distress signal near the window by flashing a flashlight, waving clothes, etc.
Fire compartment, normally closed fire door positive pressure air supply system, automatic sprinkler system, automatic fire alarm system, fire control room, etc.
The “chimney effect” and “chimney effect” cause the fire in high-rise buildings to spread rapidly.
Key 3: Find the fire refuge floor What is the fire refuge floor? Residential buildings or public buildings with a building height of more than 100 meters must be equipped with fire escape floors.
If the temperature is not high and there is no smoke in the stairwell, quickly escape down the stairway.
These materials were very easy to ignite and spread rapidly, and a large number of toxic fumes were generated after combustion, which had a great fire risk.
(In the process of downward escape, if the smoke spreads upward and the temperature rises sharply, it is very likely that the evacuation passage below has been blocked by thick smoke and fire.
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