Fire Door Extension

fire-door-extension

  • UL listed as a Miscellaneous Fire Door Accessory.
  • UL tested and listed to allow for excessive clearances up to 2″ on steel and wood doors.
  • UL fire-rated for up to 90 minutes for wood doors.
  • UL fire-rated for up to 180 minutes for steel doors
  • Does not increase or decrease your fire door assembly’s existing fire rating.
  • Tested under NFPA-252 with hose stream,  ANSI/UL 10B with hose stream,  UL 10C,  CAN/ULC S104-10.
  • This is a handed product; RH, LH, and, for steel doors with no bevel, non-handed.
  • Easy installation; does not require removal of the door.
  • US Patent Nos. 9,151,106 & 9,518,422
  • Canadian Patent Nos. 2846726 & 2939255

--- All Products US Patent Nos. 9,151,106 & 9,518,422 | Canadian Patent Nos. 2,846,726 & 2,939,255 ---

THE CROWN FIRE DOOR STOP SYSTEM IS TESTED AND LISTED WITH UL!

The Crown Fire Door Stop System is UL approved for excessive clearances on wood and steel fire doors.The Crown Fire Door Extension has been UL approved to correct excessive undercuts on wood and steel fire doors. Applying these products does not increase or decrease the fire door assembly’s existing fire rating.

Crown is the ORIGINAL, UL-listed, 90-minute wood door solution and the ONLY 180-minute steel door solution for excessive clearances and gaps.