This fire door accessory is the basis for the crown fire door stop system.
Fire door gap filler.
Use with the crown fire door stop to remedy excessive clearances on the latch side of steel and wood fire doors.
Nfpa 80 fire doors and other opening protectives.
In general clearance for those allowed gaps are as follows.
Door stop for steel doors.
Under the bottom of a door.
Doorgap gauge fdtb 1 2.
Use this for steel doors with excessive clearances up to 1 2.
Fire door caulk is the only tested and approved filler material for filling voids and through penetrations in existing listed and labeled wood fire doors.
Fire door caulk has been tested to the following criteria nfpa 252 ul10c and can s104.
Gap solution for excessive fire door and frame clearances 20 minute dkb finish.
Strike shim 4 7 8 9225.
Ul fire rated for up to 180 minutes for steel doors.
1 8 meeting edges for a pair of doors.
Ul fire rated for up to 90 minutes for wood doors.
It is listed for use on 20 minute rated ul10b and ul10c wood or hollow metal fire doors and restricts the passage of smoke with a variety of gasketing combinations including nylon brush neoprene vinyl and thermoplastic.
Strike shim 2 3 4 9945.
Refer to gap90 or gap90dkb.
3 4 between door and frame.
1 8 for more detailed gap information refer to nfpa 80 section 6 3 1 7 and section.
Using other types of filler material can void your ul listed assembly.
When installed onto your fire rated door frame the product restores compliance when fire door gaps exceed nfpa 80 requirements.