Abstract: An elevator door safety system has a motion sensor and a proximity or door sensor defined in a fire-rated elevator entrance assembly. The sensors work together to determine when to open a closing door. The invention further defines a method of controlling an elevator door providing a motion sensor and providing a door sensor, wherein signals from each sensor are sent to a control board to determine when to open elevator doors in response to detecting a person in a detection area in an elevator entrance area.

Abstract: A panel assembly for air treatment comprising a rigid body including an inner surface and an outer surface that is opposite the inner surface, the inner surface defining an inner space within the rigid body, the rigid body having a rectangular shape with a ratio of a width to a depth such that the rigid body is flat and hollow, the rigid body including a first longitudinal end containing a first opening in communication with the inner space and a second longitudinal end containing a second opening in communication with the inner space, the first opening positioned opposite the second opening along a longitudinal length, and an ultra-violet light assembly mounted within the inner space.

Abstract: An elevator door safety system has a motion sensor and a proximity or door sensor defined in a fire-rated elevator entrance assembly. The sensors work together to determine when to open a closing door. The invention further defines a method of controlling an elevator door providing a motion sensor and providing a door sensor, wherein signals from each sensor are sent to a control board to determine when to open elevator doors in response to detecting a person in a detection area in an elevator entrance area.

Abstract: An elevator cab assembly and method of assembling same wherein a plurality of side panels are connected by interlocking longitudinal edges of the side panels with longitudinal edges of adjacent side wall panels without additional fasteners. The ceiling can also be assembled using interlocking ceiling panels without the need of additional fasteners.