Partition panel assembly

Claim 1

A PANEL ASSEMBLY COMPRISING (1) A PAIR OF LATERALLY SPACED RECTANGULAR SIDE SHEETS, (2) EACH OF SAID SHEETS HAVING INWARDLY TURNED FLANGES DEFINING SHALLOW CHANNELS EXTENDING ALONG THE BOTTOM EDGE AND ALONG THE VERTICAL SIDE EDGES, (3) U-SHAPED LATERAL SPACING ELEMENTS POSITIONED BETWEEN THE VERTICAL SIDE EDGES AND THE BOTTOM EDGE OF A GIVEN SPACED SIDE SHEET SO THAT OPPOSITE LEGS OF THE U-SHAPED ELEMENTS EXTEND OUTWARDLY AND RIDE IN THE OPPOSED CHANNELS WHICH EXTEND ALONG THE BOTTOM AND SIDE EDGES OF THE SIDE SHEETS, (4) SAID LATERAL SPACING ELEMENTS AND SAID SIDE SHEETS WHEN ASSEMBLED AS AFORESAID DEFINING A VOID, CAPABLE OF CONFINING A LIQUID POUR-IN-PLACE FOAMING RESIN SYSTEM, SAID PANEL ASSEMBLY HAVING A CORE COMPRISING AN IN SITU EXPANDED AND RIGIDIFIED FOAMING RESIN FILLING SAID VOID, SAID PANEL ASSEMBLY BEING CHARACTERIZED IN THAT THE SIDE SHEETS AND LATERAL SPACING ELEMENTS ARE INTERLOCKED BY THE EXPANSION AND RIGIDIFICATION OF THE FOAMING RESIN SYSTEM, AND (5) A CAP MEMBER BRIDGING THE TOP EDGES OF THE SIDE SHEETS.