The design aid for reinforced concrete to IS 456-1978, provides P-M interaction diagrams as a design aid to simplify the design of rectangular and circular columns. As these two sections are symmetric, it becomes comparatively easy to provide the respective interaction diagrams, whereas the same is difficult for nonconventional sections like flanged and tubular cross sections. In this work an effort has been put forth in this area to develop interaction diagram for cross(+) shaped columns by varying some of its parameters such as spacing of reinforcement, grade of concrete and steel, the results showed that with the increase in grade of material there was a considerable increase in load and moment carrying capacity of the column, also by varying the spacing higher strength could be achieved in comparison with equally spaced section for a given percentage of steel.