1 Accurately measure the installation area 2 Install the edge 3 dozens of expansion screws, suspension boom 4 installation hooks, the main keel 5 triangular keel clings to the vertical direction of the keel below the keel 6 press the gussets into the three keel joints, perpendicular to each other 7 Install the appliance and verify the adjustment. In the final stage of installation, two more screws can be left unfixed to facilitate the maintenance of the circuit in the future. In addition, it should be noted that in areas with severe termite disasters, aluminum alloy keel or light steel keel should be used to prevent insects from causing the ceiling to collapse. Suspended ceiling, suspended ceiling, installation of electrical appliances, aluminum alloy JIANGSU PERFECT NEW MATERIAL TECHNOLOGY CO., LTD. , https://www.bffloor.com