Every industry focus to build and improve the chimney to create the eco-friend organization as well as to satisfy the strict environmental board. IS: 4998 criteria for design of reinforced concrete chimneys is using working stress method for chimney designing. There are some limitations of working stress method. Also the designing is difficult involving lengthy, cumbersome and iterative computational effort. So we should recognize this problem and we should use some time saving techniques like interaction envelopes to optimize the structural design. Chimneys with various heights from 65m to 280m are analyzed and designed by working stress method and limit state method for collapse and comparison of results are discussed in this paper. Generation of interaction curves for hollow circular section is also discussed in this paper