Most of the industrial steel chimneys are round cross-sections with column structures. Because of its frame behavior under lateral dynamic loading Geometry of a self-supporting steel chimney shows an important role. It is primarily responsible for the stiffness parameters of the chimney this is because of geometry. However, basic dimensions of industrial self-supporting steel chimney are generally derived from the associated environmental conditions, such as height, diameter at the exit, etc. Design code (IS-6533: 1989 Part 2) imposes several criteria on the geometry (top-to-base diameter ratio and height-to base diameter ratio) of steel chimneys to ensure the desired failure mode. To justify the code criteria with regard to basic dimensions of industrial steel chimney is the objective of the present study.