Interlocked panel structure

Claim 1

IN A STRUCTURE, A NUMBER OF STRUCTURAL MEMBERS IN LATERAL ASSOCIATION WITH ONE ANOTHER, OTHER STRUCTURAL MEMBERS EXTENDING IN LATERAL ASSOCIATION WITH ONE ANOTHER AT A DISTANCE FROM SAID FIRST MEMBERS, A LINEAR KEY INTERJACENT SAID DISTANCE MEMBERS, SAID KEY HAVING A CENTRAL WEB AND HAVING REENTRANT LENGTHWISE MORTISE-AND-TENON FORMATIONS ON BOTH SIDES THEREOF, EACH OF SAID NUMBER OF STRUCTURAL MEMBERS HAVING A WALL MEANS EXTENDING THEREON AND REACHING TO ONE OF SAID KEY SIDES, AND EACH OF SAID OTHER STRUCTURAL MEMBERS HAVING A WALL MEANS EXTENDING THEREON AND REACHING TO THE OTHER ONE OF SAID KEY SIDES, SAID WALL MEANS AT EACH KEY SIDE BEARING REENTRANT MORTISE-AND-ENON FORMATIONS JOINTLY COMPLEMENTAL TO ONE ANOTHER AND TO SAID KEY SIDE FORMATIONS AND BEING IN A SLIDABLE INTERFIT WITH SAID FORMATIONS AND SAID KEY WEB BEING IN CONTIGUITY OF SAID SIDES THEREOF WITH SAID WALL MEANS REACHING THERETO FOR RELATIVE IMMOBILITY THEREWITH.