Fire resistance of steel structure is much lower than conventional steel reinforced concrete, and fire prevention in the promotion process of the new steel plant is an important issue. In the steel plant ‘design, fire design is based on the plant type of fire hazard. Recommended in the Shanghai Construction Standards "Specifications for Design of Steel Structure Fire Protection" (hereinafter referred to as "Fire Regulations") in the clear, according to its production of steel plant fire hazard classification is divided into A, B, C, D, E Five class, mainly based in the production process, whether to use or produce flammable, combustible materials, according to the amount of the fire district arrangements. Second is to determine the fire resistance of buildings. Single, multi-layer fire-resistant plants were divided into four levels, the combustion performance of building components and fire resistance in Shanghai, "Fire Regulations" of preparedness. According to different requirements of the fire resistance of components, steel components shall be deposited by outsourcing the body does not burn or spray fire protection measures such as fire-resistant coating. The third is to determine the fire district and fire interval. The fire district plant produced according to type of building, fire resistance rating determined. In the "Fire Regulations" in the fire resistance rating of the various types of plant, number of layers and the area has specific requirements. Should be noted that: separate application firewall between the fire district; one, two fire resistance rating of the single plant (A plant excluded) as an area of more than the original provisions, have difficulty setting up a firewall can be used with fire or fire water curtain shutter water with a separated; A, B, C plant is equipped with automatic fire extinguishing equipment, fire district covers an area of the maximum allowable according to the provisions of the original double; D, E class factory installation of automatic fire fighting equipment, its area area of limitation. Local setting, the increase in area can be doubled in the calculation of the local area. The joint plant modernization generally have a certain size, it is between the workshop and the workshop should have a certain distance of fire. Space adjacent to buildings shall be fireproof recent distance calculation, such as the external walls of the combustion components protruding should be counting from the outer bulge. Should be set between large steel plant fire exits. An area of more than B and C class plant 3,000 square meters of warehouse, should set the ring fire road. When the shop longer than 160 meters, the specification should be added according to the building through the fire exits. Channel gate stack clear width greater than 3.5 meters, more than 4 meters in height.