User talk:Light283

streanth of material.: stress and strain
pleas help me calculate the problem A column is made up of a steel tube 70mm inside diameter field with concrete, if the stress in the maximum stress in the concrete is not to exceed 21N/mm2 and the column is to carry a compresive load of 200Km calculate the minimum outside diameter of the tube.take Ec=20Kn/mm2 E=200KN/mm2