a ceiling with a flat roof is also a ceiling with a flat roof. Generally, the ceiling is hung with high floors, central air conditioning on the roof or pipelines. When saving cost, the ceiling has several forms, such as mineral wool board, gypsum board, gusset plate, etc. Generally, the ceiling is connected with wood keel, light steel main keel and auxiliary keel. Ceiling is divided into flat roof and modeling roof. The flat top is the simplest, and the top surfaces are all on the same plane. Modeling the top is more complicated, the top surface may have multiple overlapping levels, and it will also contain shapes that produce special effects, such as an upper concave circle and an upper concave lamp groove. High-end restaurants and entertainment places will make modeling roofs to improve the decoration effect. \x1d\\x1d\ The method of hanging the ceiling from the keel is very simple, and the specific operation steps are as follows: \x1d\\x1d\(1) First, measure the length and width of the ceiling of the living room, and calculate the required amount of decorative boards, and then calculate the amount of battens according to the ceiling size and decorative board size. \x1d\(2) Prepare wooden keel, that is, battens. The thickness of battens should be consistent, and the length of expansion screws should be considered when determining the thickness of battens. At the same time, prepare the decorative panel. \x1d\(3) Determine the grade of wooden keel according to the size of decorative board. Pop up the center line or sideline of the keel position on the flat item with a chalk line. \x1d\(4) Select an impact drill with a diameter matching that of the expansion screw, and drill holes at the flat-topped keel with a pistol drill. When drilling holes, the matched wooden keel can be pasted on the flat top and played together to ensure the accuracy of keel installation. At the same time, the materials should be numbered to prevent confusion during installation. \x1d\(5) In order to prevent the expansion screw from growing the thickness of the batten, the exposed part should be of the same length during installation. \x1d\(6) The hole drilled by the batten needs to be larger than the screw to prevent the screw from being exposed after tightening. After opening the hole, put the batten on the screw of the flat roof, put on the nut and tighten it with the socket wrench, so as to install all the long rows of wooden keels on the flat roof. \x1d\(7) Short transverse battens are installed with round nails, and the flat-topped wooden keel is Z-shaped. \x1d\(8) Draw the center line with strokes on the installed wooden keel as the basis for laying decorative boards. \x1d\(9) Install the decorative plate finally. Knock the nail head of 25mm nail flat first, then nail the fixed position around the decorative board first, and then patch the nail every 15cm. After the installation, install decorative clips at the four corners of the decorative board to increase the beauty and firmness.