Built Up Columns and Critical Buckling Load!
Question 13-9: A column is constructed using four A992 steel angles that are laced together as shown. The length of the column is to be 25 ft and the ends are pin connected. Each angle shown below has an area of A = 2.75 in2 and moments of inertia of Ix ' = Iy ' = 2.22 in4. Determine the distance d between the centroids C of the angles so that the column can support an axial load of P = 350 kip without buckling. Neglect the effect of the lacing.
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