Fire door window construction

A fire door comprising a core of incombustible material with a wood veneer facing extending substantially throughout the area of each of the opposite surfaces thereof, said door having an opening therethrough with a pane of glass thereacross and with opposite flat surfaces of the pane of glass parallel to but spaced inwardly respectively from the exposed surfaces of said wood veneer facings, at least one elongated trim strip on either side of said pane of glass comprising elongated inner and outer members, the inner member being of a high density incombustible mineral material having a first elongated surface engaging the core of the door throughout the core's marginal edge around the pane of glass and a second surface engaging the pane of glass throughout a marginal edge portion thereof, and the outer member being coextensive with the inner member around the pane of glass and generally L-shaped in cross section so as to extend laterally from the pane of glass about the inner member and parallel with the surface of the door beyond the marginal edge of the opening in the door, the outer member being of a fire retardant particle board and having an exposed wood veneer facing throughout, and a plurality of nails extending through said members and into the core of the door whereby to secure the trim strip to the door and thus to secure the pane of glass in the door opening.