Authorities having jurisdiction determine the codes that apply in a specific geographic area.
Fire safety door locks.
If the door is one of a few in a block flats the door needs to be a fire door.
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The door in general.
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An nfpa code allows stair doors to be locked from the stairway side if the locks will release upon fire alarm activation nfpa 101 7 2 1 5 7 2.
Fire doors must also be fitted with an as1905 1 fire rated automatic door closer.
Fire door locks must be self latching and be fire rated in accordance with as1905 1.
It is not permissible to have a hold open feature on either the lock or door closer.
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This is usually done to contain the spread of fire within a commercial building or a home while also functioning as a safe method of egress for occupants within a home or commercial building.
These locks should be installed on all types of fire doors escape should always be number one priority.
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Safety to life in buildings and structures covers the life safety code.
Fire door locks are usually used in conjunction with fire doors or fire rated doors.
Thus as with an external door a card reader can be installed on the stairwell side of the door as long as it will be overridden when a fire alarm sounds.