Abstract: A structural offset adaptor formed as a unitary body for installing glass in a door frame includes snap-in connecting portions extending along each side of the structural offset adaptor, configured to retain the structural offset adaptor on an inner perimetral surface of the frame. The adaptor is configured with an inner wall and an unenclosed space adjacent the inner wall which allows the glass pane to be installed offset from the center of the door frame and flush to the push surface of the door frame. A glass-paned door with the adaptor installed on the inner perimetral surface includes the glass pane installed in the unenclosed space and flush to the push surface of the door frame. A method of installing a glass pane in a door frame includes mounting the glass flush with a push side of the door frame via the adaptor.