Ceiling structures

Claim 1

A CEILING STRUCTURE OF THE KIND IN WHICH A SERIES OF PANELS IN HUNG FROM A FRAMEWORK OF SHEET METAL ELEMENTS, IN WHICH THE FRAMEWORK CONSISTS IN A RECTANGULAR WALL BEAM OF L-SECTION THAT EXTENDS AROUND THE WALL WITH ONE LIMB OF THE L EXTENDING INWARDLY TO PROVIDE LEDGES FOR THE OUTER EDGES OF THE OUTSIDE PANELS; A RECTANGULAR OUTER FRAME INSIDE THE WALLBEAM AND SPACED FROM IT, MADE UP OF Z-BEAMS, A SERIES OF PARALLEL LONGITUDINAL BEAMS INSIDE THE OUTER FRAME AND CONNECTED TO IT AT THE ENDS OF THE LONGITUDINAL BEAMS, A SERIES OF CROSSBEAMS PASSING THROUGH PREFORMED HOLES IN THE LONGITUDINALS AND THE OUTER FRAME AND SUPPORTED AT THEIR ENDS BY THE WALL BEAM ABOVE THE LEVEL OF THE LEDGES, STRAPS TO SUPPORT THE FRAMEWORK; A SERIES OF RECTANGULAR PANELS JUXTAPOSED TO FORM A CONTINUOUS RECTILINEAR SURFACE, THE OUTER EDGES OF THE OUTER PANELS RESTING ON THE LEDGES, AND SPRING CLIPS CONNECTING THE PANELS TO THE BEAMS OF THE FRAMEWORK.