1.1 Before the construction of inverted roof, the construction team shall carefully read the drawings and refer to the relevant atlas, and shall be clear about the detailed structure and technical requirements. Read the technical disclosure carefully 1.2 After the construction of inverted roof works, pay attention to the protection of finished products, and do not drill holes, transport or stack them casually 1.3 Pipes, flues, equipment, and sporadic facilities (through pipe ladders, lightning protection