The contain the fire and help to stop it speading to other parts of the building, they also help to limit the spread of smoke. Fire doors can also reduce the amount of oxygen that supports the fire.
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Fire doors should never be propped open (with a fire extinguisher or anything else) because it will defeat the purpose of having fire and smoke separation during a fire. A self-closing fire door must be allowed to function properly for safety of the occupants who may need the extra time to safely escape through other exit doors. It would be a fire-code violation to prop open a fire door, which could result in fines or other discipline.
the doors also, its "light MY fire"
fire doors will prevent fire from speeding for only a certain amount of time, they are rated for different times. basically the create a wall that will stop the fire.
you use fire doors for when there is fire . fire door is for stop a smoke and fire for a few minuts for get people out and firer man to come and stop fire by water for stop fire not become bigger.
fire doors are normally found in a public building between certain sections of the building
There are many different kinds of fire doors and not all of them are tied to the alarm system. Some fire doors will only close when there is enough heat to sever a fusible link. However, as a general rule, automatically closing fire doors that are latched open with electrical controls would release the latch and close the relevant fire doors upon triggering of the fire alarm by any initiating device.
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Yes, you can shorten fire rated doors, but edges have to be re-lipped. Fire doors are tested to keep out fire for a set time (usually 30mins). A 24'' fire door will keep out the fire just as long as a 33'' door, its the construction that matters most, delaying fire going from front of door through to the otherside.
light my fire
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