Deformed steel bar is the steel bar with edge surface, in concrete, due to the role of ribbed, deformed steel bar and concrete bonding ability is greater, so it can better withstand the action of external forces, is widely used in a variety of building سازه ها، به ویژه سازه های ساختمانی بزرگ، سنگین، سبک و دیوار نازک و بلند.