Abstract: A structural support beam for use in buildings, bridges, mechanical frames and the like to resist bending due to gravitational and external forces comprising a top substantially flat flange disposed in fixed spaced relationship relative to a bottom substantially concave flange by an interconnecting web and a lower stabilizing brace disposed to engage the opposite end portions of the bottom substantially concave flange and the opposite end portions of the interconnecting web to reinforce the interconnection therebetween.