Elevator fire doors spaces and uses.

Fire doors turned into fire doors normally closed and normally open fire doors.

    Normally closed fire doors usually do not require electrical professional to provide automation design, but in some cases, such as: evacuation channel normally closed fire doors, when the construction side of security and other management requirements (news often reports a unit evacuation routes fire door locks dead by suspend business for rectification punishment, or people died in a fire because the owners will evacuate the dead can not escape led to the tragedy of the fire door locks channel conflict, we can see the fire and security of this phenomenon is very common) should Although did not do the requirements of the Fire Code, but designers have the responsibility to help the owners solve the contradiction of the fire and security problems with the design, electrical engineering.

    For normally open fire doors, electrical professional automation design.

    How to determine the fire door is always open it? More evacuation routes for passenger and cargo flows on fire doors usually is normally open fire doors. For example: the two types of high-rise buildings over 32 meters in height and a class of high-rise buildings shall be provided to the fire elevator building professionals tend to cater to the passenger elevator fire elevator, and the elevator room and enclosed stairwell (or stairwell) is often used in combination front room, this situation is very common, and there are a lot of high-rise building is not large body mass. The shared room with evacuation routes connected to the fire door is standard normally open fire doors, because the main flow of people and goods through the fire door into a shared room to the elevator. There: the body of a large amount of high-rise buildings, evacuation channels played the role of fire district fire doors, peacetime passenger and cargo flows a lot often is normally open fire doors.

    Only can be seen in the above two cases, normally open fire doors are commonly found in high-rise buildings.

    If the normally open fire doors inflicted normally closed does not, do not self-control of it? I think it is absolutely not, because the fire door switch is harder to spend, and out of a feeling very inconvenient (and fire doors and accessories will impact life greatly reduced due to frequent switching), often behind closed doors trolley Remove exit or fire doors are fixed to the wall. Who remembers when the fire comes we are trying to escape, panic fire doors to close it? Even if someone calm to close the door, but this time the fire doors may be fixed dead is difficult to quickly close the fire door closers are destroyed, lost the closed-door stretch, free door closed is useless even if it by not when the expansion of the fire hot air from the impact, so that shared the front room fireworks engulfed the closed stairwell escape (or the stairwell) is no longer safe, firefighters can not enter the front room to rescue from the fire elevator fire fighting, etc., and the consequences are quite serious.

    Thus, the normally open fire doors must not be normally closed to cope.

    Normally closed fire doors are generally fireproof doors, door frames, door closers, seal, dual fan or multiple fans normally closed fire door is also equipped with a sequencer.

    Normally open fire doors in addition t

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