Abstract: Design and calculation of crack width in circular GSR walls are time consuming task, which requires a great deal of expertise. Many times it is required to know crack width of a tank of known capacity and geometry before its detailed design. In circular GSR reinforced concrete wall built using high strength deformed bars and designed using limit state design method were found to have larger crack widths. To control these crack widths in reinforced and fibre reinforced concrete wall to enhance durability. The latest revision of the Indian code stresses the importance of durability and has not reduced formulae to calculate the crack widths. In this case it is important to select reinforced concrete structures with minimization of crack width including other parameters, i.e. thickness of section, area of steel required, spacing of steel, cover etc. However, under cases such as severe exposure conditions and in water tanks we may check the crack width by theoretical calculations. Cracks can be produced also by shrinkage and temperature variations. Extra reinforcements to reduce such cracks are always necessary in reinforced concrete. The methods for calculation of widths of cracks due to loads as well as those due to shrinkage and temperature changes are in this tool. Main reasons for limiting the crac
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