having n number of flat portions separated by m number of curved portions may require n m processes to fully form a structural member alternatively flat material stock may only require m number of processes as the flat portions plus flanges are derived from the original flatness of the raw material fig1 illustrates an embodiment of cross section of a structural member 180 wherein opposing flanges 184 form an angle a in the range of 100 degrees to 130 degrees also illustrated in the embodiment is dimension u201c a u201d that represents the allowable width of any connecting members thereby allowing cladding to be placed around the tower it is a well known fact that inertia increases as the mass is distributed away from the centroid and decreases as the distribution of mass is closer to the centroid an analysis of different cross sections reveals that the present disclosure cross section has the greatest distribution of mass away from the centroid and so this is the optimum design the inertia of the different shapes is kept as a constant to compare the different areas of different cross sections this feature enables quantification of the proportionate increase in area for a fixed inertia i 1 along axis 1 and inertia 12 along axis 2 for area a for the present disclosure leg the areas for other cross sections are illustrated in table a below for each shape the following optimization rule was applied and typical design limits were set as constraints such as minimize area while constraining the other variables to ix iy is at least 3500 in 4 max distance.