The compressive buckling stress of outstanding flanges reinforced by bulbs was computed by the strain—energy method for flanges having 10 shapes and a range of lengths. The results were checked for some cases by computations based on a differential—equation method. The edge of the flange opposite the bulb was considered clamped, and the loaded ends were considered simply supported. The results were analyzed to determine which shape of flange gave the greatest support to the struc-ture to which it was attached.
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