Metal wall or ceiling panel

Claim 1

A PANEL ASSEMBLY COMPRISING FIRST AND SECOND PANELS EACH COMPOSED OF AN INTEGRAL PIECE OF SHEET METAL, EACH PANEL COMPRISING A BODY PORTION ADJACENT TO AND IN ALIGNMENT WITH THE BODY PORTION OF THE OTHER PANEL, EACH OF SAID BODY PORTIONS HAVING A LONGITUDINAL EDGE AND FRONT AND REAR SURFACES, SAID EDGES ABUTTING ONE ANOTHER, A FIRST FLAT SIDE WALL SECURED TO SAID EDGE OF THE FIRST PANEL AND EXTENDING REARWARDLY THEREFROM AT AN ANGLE OF APPROXIMATELY 90*, A SECOND FLAT SIDE WALL SECURED TO THE EDGE OF THE SECOND PANEL AND EXTENDING REARWARDLY THEREFROM, A FIRST FLANGE SECURED TO A REAR EDGE OF SAID FIRST SIDE WALL AND EXTENDING OVER THE REAR SURFACE OF SAID SECOND PANEL IN SUBSTANTIALLY PARALLEL RELATION THERETO, A SECOND FLANGE SECURED TO A REAR EDGE OF SAID SECOND SIDE WALL AND EXTENDING PARALLEL AND ADJACENT TO SAID FIRST FLANGE, A FIRST ELONGATED CLAMP SECURES TO A FREE EDGE OF SAID FIRST FLANGE AND CURVED TOWARDS THE FIRST BODY PORTION, A SECOND ELONGATED CLAMP SECURED TO A FREE EDGE OF SAID SECOND FLANGE INTERNESTED IN AND CONCENTRIC WITH SAID FIRST CLAMP, SAID FIRST CLAMP TERMINATING IN A FREE EDGE SPACED FROM SAID FIRST SIDE WALL AND SAID FIRST FLANGE SO THAT SAID SECOND CLAMP MAY BE MOVED INTO SAID FIRST CLAMP AS SAID PANELS ARE ROTATED INTO COPLANAR RELATION, SAID SIDE WALLS AND BODY PORTIONS HAVING ALIGNED END EDGES, A BASE PLATE EXTENDING OVER SAID END EDGES AND SECURED THERETO SO AS TO PREVENT RELATIVE MOVEMENT BETWEEN SAID PANELS, SAID SIDE WALLS DIVERGING SLIGHTLY FROM ONE ANOTHER IN A DIRECTION AWAY FROM SAID BODY PORTIONS.