This company under the name of “Rah Ahan Sang” had begun its activities in 1993 and later the name of the company has changed to Ballast Manufacturing & Infrastructure , as transferring the central office to Tehran. Also Its registration umber is changed to 175698. At first company’s activities include ballast manufacturing , later by achieving grade from Management & planing Organization , activities like bridge construction , infrastructure & railway superstructure added to company’s services. Also new duties like renovation , reconstruction , building maitanance and wagon transportation has added to this company activities.In 2004 the company changed to public stock and then entered to Bourse.