Atrin Poulad Aj Manufacturing and Trading Company is a technical and engineering firm in Iran specializing in the design, construction, and installation of various types of steel structures, including industrial frameworks and warehouses, such as lightweight truss warehouses and beam-welded warehouses. Relying on the expertise of its engineers and designers, this company calculates and designs industrial warehouses based on their usage with the lowest possible weight and produces them using the best steel materials THhis Company is a technical and engineering group in the field of designing and manufacturing all kinds of hot rolling lines for steel sections and sheets. This group has an experienced design team consisting of engineers and experts with experience in the country's steel field, as well as manufacturing equipment. He is in his workshop The equipment of this workshop includes heavy borings for turning all kinds of rolling rack stands, super heavy duty gearboxes with tonnage unlimited, hammers, locks, guards and also industrial structures And super lathe machine for turning rolling rollers and shafts weighing up to 30 tons and calibration lathe on hot rolling rollers as well as all kinds of light turning machines such as milling cutters, types of radial drills, medium lathes as well as complete equipment for bending and cutting welding and Drilling is equipped for the construction of gearbox bodies and the construction of industrial and construction structures with the aim of fully constructing semi-heavy and heavy hot rolling lines. Also, due to having the technical knowledge and mentioned facilities, it is possible to build all kinds of advanced preheat furnaces. The roller has different capacities. the successful experiences of this company, we can mention the design and construction of Isfahan steel sheet hot rolling line, which was built, installed and operated for the first time and completely locally in Iran, as well as the development of the corner line of Isfahan steel factory. (Sepahan) is also part of the resume of this company This company, for the first time in Iran, has succeeded in designing and building a step preheat furnace for slabs with a capacity of 30 tons per hour for Isfahan steel rolling lines. It has higher and more diverse Therefore, this company is ready to develop, design and build hot rolling lines with the participation of domestic and foreign investors.