Abstract: A fire retardant panel door, including a panel door having at least one door panel and stiles and rails. The door panel includes an interior composite section formed by a first plurality of layers of intumescent materials and a first plurality of layers of fire resistant materials disposed between and laminated to a first pair of outer coverings to form a composite laminated door panel. Each of the stiles includes a first core formed of an incombustible material and a second plurality of layers of intumescent materials and a second outer covering to form a composite laminated stile. Each of the rails includes a second core formed of an incombustible material and a third plurality of layers of intumescent materials and a third outer covering to form a composite laminated rail.

Abstract: A fire retardant panel door, including a panel door having at least one door panel and stiles and rails. The door panel includes an interior composite section formed by a first plurality of layers of intumescent materials and a first plurality of layers of fire resistant materials disposed between and laminated to a first pair of outer coverings to form a composite laminated door panel. Each of the stiles includes a first core formed of an incombustible material and a second plurality of layers of intumescent materials and a second outer covering to form a composite laminated stile. Each of the rails includes a second core formed of an incombustible material and a third plurality of layers of intumescent materials and a third outer covering to form a composite laminated rail.

Abstract: A fire retardant panel door and door frame that prevents the spread of fire through the door during a fire. The fire retardant panel door has at least one door panel and stiles and rails. The door panel includes an interior center composite section formed by a first plurality of layers of intumescent materials and a first plurality of layers of fire resistant materials disposed between and laminated to a pair of outer sections formed of wood for enclosing the interior center composite section to form a composite laminated door panel. Each of the stiles includes a first center core formed of wood enclosed by a second plurality of layers of intumescent materials and a second plurality of layers of fire resistant materials; and the second layers of intumescent and fire resistant materials are enclosed by a first applique layer formed of wood to form a composite laminated stile.

Abstract: A fire retardant wooden door that prevents the spread of fire through the door during a fire. The fire retardant wooden door has at least one door panel connected to stiles and rails by tongue and groove joints, and the tongue and groove joints have intumescent material therein. Each of the tongue and groove joints includes a tongue section having the intumescent material along a distal edge of the tongue section which expands upon exposure to heat or fire to seal the tongue and groove joints in order to prevent the heat or fire from passing through the door during a fire. Each of the tongue sections includes an interior channel extending along the axis of the tongue section, and the interior channel extends into the door panel. The interior channel has the intumescent material embedded therein which expands upon exposure to heat or fire to further seal the tongue and groove joints in order to prevent the heat or fire from passing through the door during a fire.

Abstract: A reinforced fire retardant panel door that prevents buckling of the door during a fire. The reinforced fire retardant panel door includes a door member having at least one door panel and stiles and rails. The reinforced fire retardant panel door also includes at least four (4) steel washer inserts embedded within the door member for connecting at least one door panel to the stiles and rails. Further, the reinforced fire retardant panel door includes at least four (4) steel joint plates embedded within the door member for connecting said stiles and rails together more securely for providing increased structural strength and stiffness to the door in order to prevent buckling of the fire retardant panel door during a fire.

Abstract: A double-hung window structure including an upper window and a lower window within a window frame having seals. The upper and lower windows include a plurality of interlocking horizontal and vertical mutton members for forming a plurality of window openings with each having a window pane therein. The double-hung window structure includes a first sealing assembly located between the right stile of the upper window and the right jamb of the window frame; a second sealing assembly located between the left stile of the upper window and the left jamb of the window frame; a third sealing assembly located between the right stile of the lower window and the right jamb of the window frame; and a fourth sealing assembly located between the left stile of the lower window and the left jamb of the window frame.