Building structures shielded against radio-frequency radiations and components thereof

Claim 1

AN INSULATED PANEL UNIT COMPRISING A FLAT, IMPERFORATE METAL INNER FACING SHEET, A LONGITUDINALLY CORRUGATED METAL OUTER FACING SHEET, AND A RECTANGULAR FRAME COMPRISED ENTIRELY OF NON-METALLIC MATERIALS TO WHICH SAID INNER AND OUTER FACING SHEETS ARE SECURED TO FORM A UNIT THEREWITH, SAID FRAME COMPRISING TWO SPACED LONGITUDINAL MEMBERS AND AT LEAST TWO TRANSVERSELY EXTENDING MEMBERS, THE LONGITUDINAL MEMBERS OF THE FRAME BEING OF A HEIGHT AND SIZE TO FIT WITHIN CORRESPONDING CORRUGATIONS OF THE OUTER METAL FACING SHEET AND ENGAGING THE INNER SURFACES OF THE CRESTS OF THE CORRUGATIONS TO SUPPORT THE SAME, THE HEIGHT OF SAID TRANSVERSELY EXTENDING MEMBERS BEING RELATED TO THE DEPTH OF THE CORRUGATIONS IN SAID CORRUGATED SHEET TO ENGAGE AND SUPPORT THE BOTTOMS OF THE CORRUGATIONS, SAID FRAME LYING WHOLLY WITHIN THE OUTER AND INNER SHEETS, SAID CORRUGATED SHEET BEING AFFIXED TO SAID FRAME BY MEANS OF NON-METALLIC FASTENERS, SAID IMPERFORATE METAL INNER SHEET BEING WELDED TO METAL CLIPS SECURED TO SAID FRAME AND EXTENDING OUTWARDLY THEREFROM IN CONTACT WITH SAID INNER SHEET, SAID CLIPS BEING DISPOSED IN OPPOSITION TO THE SAID CRESTS OF SAID CORRUGATED METAL OUTER FACING SHEET, WHEREBY THE METAL-TO-METAL DISTANCE BETWEEN SAID INNER AND OUTER SHEETS IS LESS THAN AN ARCING DISTANCE FOR RADIO-FREQUENCY RADIATION TO PREVENT THEREBY TRANSFER OF RADIO-FREQUENCY RADIATION THROUGH SAID INNER AND OUTER SHEETS.