Do you really understand the fire doors around you?

Fire door

What is a fire door?

Fire doors refer to doors that can meet fire resistance stability, integrity and thermal insulation requirements within a certain period of time. It is a fire-resistant partition with certain fire resistance located in fire-resistant partitions, evacuation stairwells, vertical shafts, etc.

What is the function of fire doors?

In addition to the function of ordinary doors, fire doors also have the function of preventing the spread of fire and smoke. They can prevent the spread of fire within a certain period of time and ensure the evacuation of personnel. They are essential equipment in fire protection facilities. .

Nowadays, most high-rise buildings are equipped with fire doors, some of which are open all year round and some of which are closed. So, how to use fire doors? Then let\’s listen to what it says…

Fire doors are divided into opening and closing characteristics

Normally open fire doorNormally closed fire door

Normally closed fire doors

Normally closed fire doors are usually closed and need to be pushed open when people move around. There are certain shortcomings in the open state of normally closed fire doors. Since the place where the fire door is installed is usually a passage where people often move around, Caused certain contradictions

Especially in large shopping malls with a large flow of people, if a normally closed fire door is installed in the evacuation stairwell inside, the fire door will soon be damaged and fall off due to frequent opening and closing. It fails to prevent fire and creates a fire hazard.

Normally open fire doors

Normally open fire doors are open at ordinary times and automatically closed in the event of a fire. Because they remain open at ordinary times, they facilitate the passage of personnel, ventilation and lighting, and can close themselves in the event of a fire, thus preventing smoke and fire. , thus completely solving the inconvenience caused by the normal closing of fire doors and the man-made damage caused by frequent opening and closing of fire doors, while ensuring fire safety.

Therefore, in the evacuation stairwells of some large shopping malls, Normally open fire doors should be installed, which are normally open and controlled by various sensors to close the door in the event of a fire.

Where are fire doors generally located?

1. Close the evacuation stairs leading to the walkway; close the elevator room leading to the front room and the door of the front room leading to the walkway.

2. Cable wells, pipe wells, exhaust ducts, garbage channels, etc. vertically Inspection door for pipe well.

3. Divide fire protection zones and control the fire walls and doors on the fire partition walls set up in the building areas of the zones. When it is difficult to install fire walls or fire doors in a building, fire shutter doors should be used instead and must be protected by water curtains.

What needs to be reminded is that

No matter what kind of door it is

In case of fire

Be sure the fire door is closed

Tips for using fire doors

Fire doors in When a fire occurs, it can buy people more time to escape. What should we pay attention to when using fire doors?

1. Fire doors must close automatically

An automatic door closer is required

Since people cannot close the door casually when a fire occurs, the fire door must be automatically closed and an automatic door closer must be installed.

It should be noted that do not mistakenly install this type of automatic door closer on the side of the fire surface to avoid being damaged by high temperatures in the event of a fire. Make sure the automatic door closer is sensitive and effective at ordinary times, and replace it in time if it is damaged.

2. Normally open fire doors must be equipped with fixed devices to facilitate passage

It is worth noting that a professional door suction device must be used, and hooks or door cards cannot be used to fix the fire door, because when a fire occurs, people will not close the door in panic, which will cause fireworks escaping, thus making walkways and stairwells lose their role in safe evacuation.

3. Prevent debris from getting stuck

Prevent carpets or indoor furnishings from getting stuck on fire doors, and do not intentionally leave normally closed fire doors in a normally open state. Ensure that fire doors can be used normally when a fire occurs.

4. Double-leaf fire doors must be equipped with a sequencer to control the steps before and after the door leaves are closed

Some double-leaf fire doors have bites to facilitate sealing. If the closing order is reversed, they cannot be closed tightly. Therefore, a sequencer must be installed to control the steps before and after the door leaves are closed.

5. It is prohibited to decorate fire doors without authorization

The main function of fire doors is fire protection, so they are lacking in aesthetics. Some owners make secondary modifications to fire doors after acceptance by the fire department. For those who paint or paste decorative boards, not only is the material used flammable or not a problem, but also inDuring modification, problems such as damage to the door body, damage to the internal fireproof materials, and peeling of the fireproof seal strip will all have an impact on the fireproof performance of the fire door.

(Source: Staff Wu talks about fire protection)