Patent ID: 6745526
Filing Date: 2004-06-08
Classification: E06B

Abstract:
A fire retardant wooden door, comprising:a) a door having at least one door panel or glass panel Â¼â€³ fire rated and stiles and rails; b) said at least one door panel being connected to said stiles and rails by tongue and groove joints, and said tongue and groove joints having intumescent material therein; c) each of said tongue and groove joints includes a tongue section having said intumescent material along a distal edge of said tongue section which expands upon exposure to heat or fire to seal said tongue and groove joints in order to prevent the heat or fire from passing through said door during a fire; d) each of said tongue sections includes an interior channel extending along the axis of said tongue section, and said interior channel extending into said at least one door panel; and e) said interior channel having said intumescent material embedded therein which expands upon exposure to heat or fire to further seal said tongue and groove joints in order to prevent the heat or fire from passing through said door during a fire.