what is undercut


The bottom rod of the device will accommodate a 1/4" to 3/4" door undercut per 2130 template .
Floor Clearance, Clearance
For devices with bottom latches and strikes, the maximum undercut is 1/4" to ensure latching in the case of a fire. For devices approved without bottom latches and strikes, using the AFL (aux...
To determine Actual Door Size, the following values are subtracted from nominal door size (frame opening/order size) Actual Door Size: The largest measured width by height of the door leaf as m...