Multi-sectional construction

Claim 1

A BUILDING UNIT COMPRISING FOUNDATION WALL; FLOOR MEANS; WALL MEANS; CEILING MEANS; EACH OF SAID MEANS INCLUDING A PLURALITY OF PANELS JOINED TOGETHER, EACH OF SAID PANELS HAVING A MATING CONFIGURATION ON EACH END THEREOF, SAID MATING CONFIGURATION COMPRISING AN INTEGRAL TONGUE ON TWO ADJACENT EDGE SURFACES THEREOF AND A GROOVE ON THE OPPOSITE EDGE SURFACES THEREOF, EACH SAID PANEL HAVING A TONGUE RECEIVED IN A GROOVE OF AN ADJACENT PANEL AND A GROOVE RECEIVING A TONGUE OF AN ADJACENT PANEL; AND CONNECTING MEANS AT EACH INTERSECTION OF ONE OF SAID MEANS WITH ANOTHER OF SAID MEANS JOINING SAID FLOOR MEANS, WALL MEANS AND CEILING MEANS TOGETHER, SAID CONNECTING MEANS BETWEEN SAID FLOOR MEANS AND SAID WALL MEANS INCLUDING A FIRST PLATE HAVING A MATING CONFIGURATION IN ONE EDGE THEREOF RECEIVING A RESPECTIVE MATING CONFIGURATION OF SAID FLOOR MEANS IN MATING RELATION, MEANS FOR SECURING SAID FIRST PLATE TO THE FOUNDATION WALL, AND A SECOND PLATE SECURED TO SAID FIRST PLATE, SAID SECOND PLATE HAVING AN INTEGRAL MATING CONFIGURATION ON THE UPPER EDGE SURFACE THEREOF RECEIVED IN A RESPECTIVE MATING CONFIGURATION OF SAID WALL MEANS.