Do you know this door?
This door
Should it be closed or should it be opened?
A fire door is a door that can meet the requirements of fire stability, integrity and thermal insulation for a certain period of time. The fire door is divided into three grades: A, B and C, and the fire door leading to the evacuation staircase is generally a Class B fire door, which will not be broken after burning for 60 minutes.
in everyday life
There are many people who are completely unaware of the importance of fire doors
Cognitively, behaviorally
There are also many misunderstandings
China Fire Fighting
, like 2019
For convenience, the normally closed fire door is open all year round
There is a pile of debris near the fire door
Lock the fire door or change it to an anti-theft door
As everyone knows
These acts in the event of a fire
It can contribute to the spread of fire and obstruct escape routes
According to the "chimney effect"
A 30-storey building in an unobstructed state
The smoke goes from the first floor to the top floor in just 30 seconds
This leads to the majority of smoke poisoning victims
The places of death are all there
An evacuation route far from the point of fire
Or in the hallway or even at home
Normally closed fire doors are a type of fire doors
It is usually located in staircase walkways, elevator halls, and cable shafts
Exhaust flue and other doors in some enclosed places
When people open and pass after
The door closer on the door in turn causes the fire door to close automatically
Such fire doors after a fire
In order to effectively block the invasion of smoke and fire
Buy time for people to evacuate
Ensure a safe escape
If the normally closed fire door is open for a long time
If it is mild, it will not be able to return normally
In the worst case, it may damage the door frame and door panel
It loses the effect of smoke and fire resistance
Serious consequences of mass deaths and injuries
So it doesn't matter what kind of building it is
Be sure to make sure it
Normally closed fire doors are closed
Deliberately destroying the door closer of normally closed fire doors
It is illegal to change normally closed to normally open
If you see it in life
The normally closed fire door is opened
Please turn it off at will
Maybe you're inadvertently making an action
It can help others avoid smoke and fire
Keep normally closed fire doors closed
It takes you and me to work together!
Source: China Fire Protection