Knockdown steel shelving unit and corner fastening means therefor

Claim 1

IN AN ADJUSTABLE KNOCKDOWN SHEET METAL SHELVING UNIT, IN COMBINATION, AN ELONGATED UPRIGHT CORNER POST COMPRISING A MAIN BODY PORTION OF CHANNEL SHAPE CROSS SECTION AND INCLUDING PARALLEL SIDE FLANGE AND A CONNECTING WEB PORTION, A GENERALLY RECTANGULAR HORIZONTALLY DISPOSED SHELF HAVING A SHEET PORTION AND A DEPENDING CLOSED RECTANGULAR BOX FLANGE EXTENDING ALONG AT LEAST ONE LONGITUDINAL EDGE THEREOF, WITH ITS TWO VERTICAL WALLS SUPPORTING THE SHELF PORTION AT SAID EDGE, A DEPENDING FLANGE EXTENDING ALONG AN ADJACENT TRANSVERSE EDGE THEREOF, SAID SHELF AND DEPENDING FLANGES BEING CUT AWAY AT A CORNER REGION OF THE SHELF TO RECEIVE THE CORNER POST WITH THE WEB PORTION BEARING AGAINST THE ADJACENT OPEN RIM OF THE BOX FLANGE AND WITH ONE SIDE FLANGE OF THE CORNER POST OPPOSING AN ADJACENT END EDGE OF THE TRANSVERSE SHELF FLANGE, A REACTION NUT INTERENGAGING SAID VERTICAL WALLS AND HAVING A PORTION THEREOF FIXEDLY DISPOSED WITHIN SAID BOX FLANGE AGAINST AXIAL MOVEMENT THEREOF TOWARDS SAID CORNER POST, THERE BEING A SERIES OF VERTICALLY SPACED HOLES IN SAID WEB PORTION OF THE CORNER POST, AND A FASTENING SCREW SELECTIVELY RECEIVABLE THROUGH SAID HOLES AND PROJECTING THROUGH ONE OF THEM AND THREADEDLY RECEIVED NUT SAID REACTION NUT, SAID FASTENING SCREW AND REACTION NUT SERVING TO DRAW THE WEB PORTION OF THE CORNER POST HARD AGAINST THE ADJACENT OPEN RIM OF THE BOX FLANGE.