The construction of Steel plant have the advantages of security, high degree of mechanization. The material of steel component is single, and is finished, processing is simple, high degree of mechanization, short construction period. Light weight steel plant, although the proportion of steel, but its good mechanical properties, can bear a greater load, steel section size is small, the same loads, at most the weight of steel roof concrete roof of the 1 / 3 or 1 / 4. The weight of steel is small, easy to transport. Flexible steel standard factory layout, floor space utilization high. Flexible steel plant process plant layout requirements and maximize space utilization, while also a good solution to the plant ventilation, lighting, thermal insulation and roof drainage, living facility layout, personnel evacuation.