In order to enhance the safety on electrically locked emergency exit routes a new norm pren13637 was approved in december 2015.
Fire exit door locking systems.
In recognition of this problem many building codes have been modified to allow the use of delayed egress locking systems on emergency exit doors.
The delayed egress locking system typically consists of an exit push bar an auxiliary locking device an audible alarm and a special electronic control package.
International and local building codes as well as fire safety laws require them.
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Nfpa emergency exit door requirements for locks doors are laid out so that they can be opened from the outside when the building is occupied.
Exit route doors must be free of any device or alarm that could restrict emergency use of the.
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Any product used as part of a fire door assembly must be listed for that use.
Selecting the proper level of protection.
The exit device is suitable for all doors aluminum hollow metal or wood where there is no projection on the face.
Emergency exit door locks have two main functions.
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Prevent unauthorized entry into or exit from a building and allow fast exit from the building.
A device such as a panic bar that locks only from the outside is permitted on exit discharge doors.
For instance a latch or some other fastening device is a requirement for doors with a simple releasing device.
According to this norm a complete system including emergency exit switch locking element and control unit have to be tested together and meet the sil2 safety standard.