What special door is it that won't let you open ......
2022/01/10
Home is everyone's safe haven
I don't know when you go home
Have you ever noticed this door?
This door is usually found in the stairwell
And it's always closed
So do you know this door in daily life
Do you know what role this door plays in daily life?
I. What is a fire door?
Fire door refers to the door that can meet the requirements of fire resistance stability, integrity and thermal insulation within a certain period of time. It is located in the fire partition, evacuation stairwells, vertical shafts and other fire separation with a certain fire resistance.
Fire door in addition to the role of the ordinary door, but also has the role of preventing the spread of fire and smoke diffusion, can be in a certain period of time to prevent the spread of fire, to ensure the evacuation of people.
Second, the door, the closed or open?
Some partners are not in doubt
Think this door is closed unreasonable?
And inconvenient to walk
May also affect the ventilation of the building
But the full name of this door is
Normally closed fire door
It can "protect life" in case of fire.
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