Abstract: The invention relates to a corner key reinforcement brace for strengthening the joint between the beveled ends of abutting tubular metal members such as found in the frame of metallic storm or screen doors. The corner key is internally slip-fitted within each of the adjacent, abutting frame members in a manner so that a relatively close tolerance is maintained between the inner walls of both tubular members and the corner key. The corner key is formed of two substantially identical half sections having first and second leg portions disposed at substantially right angles to one another. All of the leg portions are substantially U-shaped in transverse cross section with one pair of corresponding legs having the top edges of the sidewalls thereof bent inwardly.

Abstract: Spaced panel bearing studs are vertically arranged to receive and support panel members defining a wall surface. The studs are maintained in a spaced apart relation by detachable spacer bars extending therebetween and releasably engaged therewith. The panel members can be adhesively secured to the studs or mechanically secured in place by separate batten strips or by skirt portions formed integral with the panel members. The batten strips and skirts are each provided with tongues having enlarged formations interlockingly engagable with clips detachably mounted on the studs. Axially adjustable extender clips are insertable in the upper ends of the studs for connecting the studs to ceiling channel members.