Abstract : Column One of the most important structural components, columns transfer the weight to the foundations immediately. Therefore, their exposure to any variables or any severe conditions, such as corrosion, may result in the columns buckling, which might lead to the structure collapsing. This manuscript aims to investigate how steel fiber and type of water may reinforce for R.C. columns. In the last few years, the use of steel fiber has been verified in reinforcing. Many researchers have examined c