Abstract: For use in a suspended ceiling of the well known type utilizing inverted T-bar support framework, novel panels of this invention provide a pattern of parallel flutes extending the full length of the panel. Panels fit between adjacent cross runners of a T-bar type suspension system, supported removably along two opposite sides in a manner which integrates the fluted panels and the downwardly exposed T-bar flanges into a uniform pattern substantially disguising the presence of the T-bars. Associated trim members of a miniature beam style may be attached to T-bar main runners as a finish accent between ends of end-adjacent panels and, if desired, around the perimeter of the subceiling where they serve to conceal wall angles which provide support to panels at the perimeter. Panels may be readily produced from flat sheet metal stock in a forming process and are easily installable and removable in the suspended subceiling framework.

Abstract: Ceiling panels, formed from metal rods welded together in a grid pattern, are easily installed in suspended subceilings of the type in which panels are supported on bottom flanges of a framework of inverted T-bar rails. In a lower layer of the panel, an array of spaced parallel rods is tied together across each end by an end rod to form a perimeter which fits within a cell opening of the inverted T-barsupport framework, while rods in an adjoining upper layer of the panel, oriented perpendicular to the rod array in the lower layer, are made to extend beyond the lower layer perimeter so as to support the panel, along two opposite panel edges, upon the upper side of bottom flanges of the support frame rails. The perimeter rods in the lower layer in combination with with the exposed portion of the support rail flanges produce the finished effect of a uniform border around each panel.

Abstract: For easy installation onto conventional inverted T-bar subceiling support framework, hollow miniature beams of this invention are readily attached onto the bottom flanges of the T-bar rails without requiring fastening hardware or tools. The beams are supported by return flanges at the top of their sidewalls, resting on the top sides of the flanges of the T-bar rail. The beams may be extruded from plastic for light weight, reinforced by a transverse web bridging the top region of the sidewalls. Other U-shaped configurations, without the web, are suited to roll- or brake-forming from sheet metal, or extruding from aluminum. A longitudinal groove is provided along the upper portion of each sidewall; the inward intrusions of the grooves, in co-operation with the bridge web when used, function as a strike plate against the bottom side of the rail flanges to constrain the beam from skewing or working upwards.

Abstract: Although utilizing an inverted T-bar suspension grid, this ceiling system presents a continuous decorative relief pattern that is visually uninterrupted by T-bars. To this end, each ceiling panel consists of a thin plastic sheet molded to form a three-dimensional decorative relief pattern of symmetric design. The T-bar flanges are covered with thin plastic facing strips having repetitive geometric design elements relief molded therein. Each ceiling panel also includes a molded peripheral shoulder recessed from the adjacent panel surface by an amount at least equal to the combined thickness of the T-bar flange and the facing strip. When the panels are supported by the grid with the recessed shoulders seating on the T-bar flanges, the facing strip design elements align with the symmetric relief pattern of the ceiling panel to present a visually uninterrupted decorative ceiling.