knock out frame

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The rough opening dimensions are the same for either Welded (SUA) or Knock Down (KD) frames For F, FN, FE, DE, MU three sided frames and four sided borrowed light frames: New masonry Walls: N...
 For DW, K three sided frames and four sided borrowed light frames: Three sided frame = door opening width (order size) plus 1 1/2" minimum to 2" maximum and the door opening height ...
Side Light and Side Panel frames - Side Light and Side Panel frames are not KD (Knock Down), they must be assembled and welded. All side lite and side panel frames must be assembled and welde...
Knock Down (KD) frames: KD frames are designed, manufactured and supplied with integral miters which include all notches, interlocking corner tabs and slots to allow for field assembly and do not r...
The 6216 electric strike was designed only for use with only the Folger Adams 310-3-1 mortise lock with deadbolt. The dead bolt must be retracted manually for the the strike to operate.
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.
Von Duprin doesn't offer any electric strike to fit into 1 1/2" aluminum/metal faced frame.  Minimum requirement to install 6211/6211AL is 1 15/32" mortise depth.