Steel structure project of daylighting roof of scientific research building of Shenzhen shenzhuang (Chizhou) Industrial Park Co., Ltd.: the project is located in Chizhou high tech Development Zone, Chizhou, Anhui Province, with a construction area of about 410 m2 and a height of 2m. The structural form is steel well beam, with a design service life of 50 years and a structural safety grade of grade II.