The backset is 2 3/4" from edge of door to the center line of the device and strike.
The preparation for the WS98/99 strike must be specified when placing order for the frame.
The Von Duprin XP98/99 device uses a different strike than standard 98/99 device.
The 909 strike is for non fire rated XP devices and the 954 strike is for the fire rated XP device.
49/9954 mul...