Can knockdown be fire rated

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Answer
The 6223-FSE electric strike is fire rated for pairs of wood doors, but check with wood door manufacturer to see if they have been approved for this application.
Fire Rated three (3) frames are available in the following maximum door opening sizes: F and FN-Series frame: 4' 0" X 10' 0" single door opening 8' 0" X 10' 0” double door opening MU-Ser...
The 6111 electric strike can be used only on non rated openings less bottom rod with pullman top latch (use ES prefix when ordering device). Device back set will change to match the centerline of t...
Not for use in fire rated openings.
AFL stands for "Auxiliary Fire Latch" on fire rated exit devices.
Masonry T anchor are approved for fire rated frames up to 3 hours. T Anchors are shipped lose for field installation. Anchor construction: The T portion and the strap do have minimum dim...
Non fire rated doors can be furnished with a maximum 3" diameter hole for viewer preparations. Fire rated doors have a 3/4" maximum holes size unless otherwise listed by UL or ITS/WHI. Viewers mus...