New plant planning and single building design steel structure project of Anhui Zheyuan recycled paper Technology Co., Ltd.: the project is located in Qianjiang Industrial Park, Chizhou City, Anhui Province. The main structure is a single-layer light steel portal steel frame workshop, with three building areas of about 15000 m2 and fire resistance rating of grade II; The design reasonable service life of the main structure is 50 years, and the design reasonable service life of the envelope structure is 25 years; The seismic fortification category is class C, and the seismic fortification intensity is grade 6.