Car end wall

Claim 1

A UNITARY FREIGHT CAR WALL STRUCTURE FABRICATE FROM A PLURALITY OF SMALLER COMPONENTS AND COMPRISING, IN COMBINATION, TWO SUBSTANTIALLY IDENTICAL METAL PANELS EACH HAVING AT LEAST ONE UNCORRUGATED MARGIN, SAID PANELS ABUTTING EACH OTHER ALONG A VERTICAL LINE AND EACH PANEL CONSTITUTING SUBSTANTIALLY A HALF PORTION OF SAID END WALL, SAID END WALL FURTHER COMPRISING AN APPROXIMATELY RECTANGULAR THIRD METAL PANEL OVERLYING SAID VERTICAL LINE AND WITH ITS LONGITUDINAL AXIS COINCIDENT THEREWITH, SAID LAST MENTIONED PANEL EXTENDING SUBSTANTIALLY THE ENTIRE HEIGHT OF SAID OTHER TWO PANELS AND BEING FORMED WITH A WEB OF SUBSTANTIALLY CONSTANT WIDTH IN SUBSTANTIALLY COEXTENSIVE CONTACT WITH SAID UNCORRUGATED MARGINS AND WITH A TAPERED VERTICALLY EXTENDING CORRUGATION ON EACH SIDE OF SAID WEB AND OVERLYING SAID MARGIN OF THE RESPECTIVE UNDERLYING PANEL, A WELD EXTENDING ALONG SAID VERTICAL LINE AND INTEGRALLY CONNECTING TOGETHER SAID TWO PANELS AND SAID WEB OF SAID RECTANGULAR THIRD PANEL, AND A WELD EXTENDING ALONG EACH LONGITUDINAL BOUNDARY OF SAID THIRD PANEL AND INTEGRALLY CONNECTING THE LATTER TO THE RESPECTIVE PANEL LYING THEREUNDER.