English：

Al-Mg-Mn plate is a kind of light weight, high strength and corrosion resistant metal material,which is widely used in building roofs. Due to the complex shape of the roof, the construction of the Al-Mg-Mn plate is difficult, and the requirements for the display effect are high. In order to solve theconstruction difficulties and improve the installation quality of the special-shaped hat-shaped metal roof,the 3D laser scanning technology is used to scan and reverse the main structure of the site, and the pointcloud model is obtained and imported into the BIM software. Based on the point cloud model, thedetailed design of the roof panel is carried out, and the information of the Al-Mg-Mn plate is finallyderived,which provides the parameter basis for the on-site cutting and blanking. During the constructionprocess, the Al-Mg-Mn plate transport frame lifting, rope ladder installation and other measures areadopted to ensure the construction quality and improve the hat-shaped forming effect.