Question: A steel angle iron, loaded in compression is added to a structure in order to increase its rigidity. Although the two ends are attached by rivets, the end fixity is sufficiently questionable that pinned ends are to be assumed. The length is 1.2 m, and the yield strength is 350 MPa. The radius of gyration about centroidal axis parallel to either side is 8 mm, but the minimum radius of gyration (about a centroidal axis at 45 degrees to the sides) is only 5 mm. What compressive load (express as a function of the cross sectional area, A) can be carried with a safety factor of 3?