ABSTRACT
In designing chimney walls there are no place for cracks. Horizontal and vertical cracks can caused corrosion of concrete and steel bars. Cracks decreases stiffness of reinforced concrete chimney shell construction. Local and global imperfactions of chimney walls are increasing according to greater number of cracks. Taking into account these facts, cracks reduce the service life of chimneys. Horizontal and vertical cracks allow condensate water infiltrates into wall. It causes corrosion and dank of concrete wall and during winter time cracks become bigger because if glaciations water in cracks.
