minimum stile requirements AD/CO:
Minimum stile = (1/2 x Rose diameter) + Backset + 1/4"....
AD/CO Rose = 3.44 inches
backset = 2 3/4 inches
plus 1/4
that formula gives a 4 3/4 minimum
but 5" is the rule of thumb for all AD/CO series locks -
However, a safe width would be two times the backset for the exit device being used; i.e., 4-3/8" for a 2-3/16" backset and 5-1/2" for a 2-3/4" backset. (especially if a glass & metal door is involved!)
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