Drawing attached is a church structure. This column alignment is this a good practice. Two storied 8m span 5bays are there. The ground floor is done. Columns are raised for first floor. Theory and practice the difference. Please clarify my doubt.
Dear Alex, columns could be dimensioned with dead and live loads predicted following local regulations and recommendations. Considering the column height, you should deal not only with mechanical strength but also with buckling strength. The critical load for buckling requires a high radius of gyration (Pcr = (pi)^2*E/(k*L/r)^2 ; being r = root(I/A)), so the slenderness ratio (k*L/r) decreases and so, increasing Pcr.The best shape for a column should be the one that accomplishes both limits (mechanical strength and buckling strength). You have to consider that no predominant directions for inertia and radius of gyration are preferred (circular column); nevertheless, considering limitations of useful area and forms to construct that column, rectangular shapes or other shapes could be considered. "L", "T", and "I" columns could also be used, but always considering limitations of area (to take advantage of available spaces in the plans).