when are fire rated exit devices required?

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The use of Panic Hardware and/or Fire Exit Hardware is required by the International Building Code (IBC) and NFPA 101 – The Life Safety Code, depending on which code and which edition of the code i...
Installation should be 6" from bottom of the door. See attached templates as reference.  T-5494 for HM Doors W-5494 for Wood Doors
There is not a fire rated version of the Von Duprin 33A/35A rim device.  Only the vertical rod devices (33/3527A-F, 33/3547A-F, 33/3548A-F) can be fire rated.
A standard exit device can't be modified to a fire rated exit device.  A new device must be purchased.
Yes, as an option, Steelcraft doors are available with factory prepared for the 98/9949 Concealed Vertical Cable Exit Device. L, B, CE, T and CE-Series doors are available factory prepared Door...
AFL stands for "Auxiliary Fire Latch" on fire rated exit devices.
No, dogging cannot be added to a fire-rated mechanical exit device. Fire rated devices can be only electronically dogged and drop during fire activation.