Framework structures and elements for use therein

Claim 1

A FRAMEWORK CORNER CONSTRUCTION OF THE TYPE COMPRISING PERFORATED ANGLE STRIPS, SAID CORNER CONSTRUCTION INCLUDING TWO L-SECTIONED FLANGED MEMBERS ARRANGED WITH THEIR LENGTHS AT RIGHT ANGLES AND THEIR MEETING ENDS SECURED TOGETHER WITH ONE END PORTION OF ONE OF THE FLANGES OF ONE OF SAID STRIPS LYING IN A PLANE PARALLEL TO AND OVERLAPPING ONE FLANGE OF THE OTHER STRIP WITH THE NON-OVERLAPPING FLANGES OF SAID ANGLE STRIPS PROJECTING IN THE SAME DIRECTION AWAY FROM SAID OVERLAPPING STRIPS AND A FLAT ANCHOR PLATE SANDWICHED BETWEEN AND SUPPORTED BY BOTH OF SAID LAST-MENTIONED FLANGES, SAID ANCHOR PLATE HAVING AT LEAST THREE PERFORATIONS SPACED AT THE CORNERS OF A RIGHT-ANGLED TRIANGLE HAVING ITS TWO SHORTER SIDES RESPECTIVELY EXTENDING PARALLEL TO THE LENGTHS OF THE FLANGED MEMBERS, EACH FLANGED MEMBER HAVING AT LEAST TWO SPACED PERFORATIONS ONE OF WHICH REGISTERS WITH THE RIGHT-ANGLE CORNER PERFORATION OF THE ANCHOR PLATE AND THE OTHER OF WHICH REGISTERS WITH ONE OF THE OTHER CORNER PERFORATIONS OF THE ANCHOR PLATE, AND FASTENING MEMBERS EXTENDING THROUGH SAID REGISTERING PERFORATIONS AND SECURELY CLAMPING SAID FLANGED MEMBERS IN FIXED POSITION, THE LENGTH OF THE UNSUPPORTED EDGE PORTION OF SAID ANCHOR PLATE MEASURED ALONG THE HYPOTENUSE OF SAID RIGHT-ANGLED TRIANGLE BEING LESS THAN THE LENGTH OF EITHER OF THE ADJACENT EDGE PORTIONS THEREOF (ALSO MEASURED ALONG THE SAID HYPOTENUSE) SUPPORTED BY SAID PARALLEL FLANGES, SAID CONSTRUCTION COMPRISING ALSO A THIRD SIMILAR ANGLE STRIP HAVING ITS FLANGES FASTENED TO THE NON-OVERLAPPING FLANGES OF SAID TWO ANGLE STRIPS SO AS TO EXTEND AT RIGHT ANGLES THERETO AND AT LEAST ONE SIMILAR ANCHOR PLATE SANDWICHED BETWEEN A FLANGE OF SAID THIRD STRIP AND THE FLANGE TO WHICH IT IS FASTENED.