1、 There are two ways to install and fix the color steel plate: through type and concealed type. Through fixing is the most common way to install the color steel plate on the roof and wall, that is, to fix the color plate on the support with self tapping screws or rivets. Through fixing is divided into wave crest fixing, wave trough fixing or their combination. Concealed fixation of concealed buckle is the fixation method that the special buckle matched with the concealed buckle color steel plate is fixed on the support first, and the main rib of the color plate and the central rib of the concealed buckle are toothed, which is generally used for the installation of roof panel. 2、 The side of color steel plate And end lap. When installing each steel plate, the edge lap shall be accurately placed on the previous color steel plate and clamped with the previous steel plate until both ends of the steel plate are fixed. A simple and effective method is to clamp the overlapped steel plates with a pair of pliers. When the steel plate is placed along the longitudinal direction, its end, especially the upper end, shall be clamped by pliers to ensure that one end of the steel plate is in place, and the overlap at one end is also in the correct position, so as to fix the steel plate. During the fixing process, the clamp shall always clamp the steel plate in the longitudinal direction. Before installing the next steel plate, each steel plate must be completely fixed. The fixing must start from the center of the steel plate, then extend to both sides, and finally fix the lap edge of the steel plate. For end lapping, since roof and wall profile plates are made by continuous processing method, steel plates can be supplied according to the length limited by transportation conditions. Generally, no lapping is required, and the steel plate length is enough to meet the needs of roof laying. 3、 Selection of self tapping screws. The fixing screw should be selected The fixed parts shall be selected according to the service life of the structure, and special attention shall be paid to whether the service life of the cladding material is consistent with that of the specified fixed parts. At the same time, the thickness of steel purlin shall not exceed the self drilling capacity of screw. The screws currently available can have plastic heads, stainless steel covers or be coated with a special durable protective coating. In addition, in addition to the screws for snap fixing, all other screws are provided with waterproof washers, and the corresponding special washers are provided for the lighting panel and special wind pressure.