(1) Paper gypsum board. Paper-faced gypsum board is a building board made of construction gypsum (CaSO4.1 / 2H2O) as the main raw material, mixed with a proper amount of fibers with special functions and additives, and firmly combined with special protective paper .

For the characteristics, varieties and specifications of paper-faced gypsum board, see “Light Steel Keel Paper-faced Gypsum Board Partition Wall”. It must be emphasized that the thickness of the paper gypsum board for the ceiling is 9 mm.

(2) Caulking putty and seam tape. The caulking putty and seam tape used for light steel keel paper gypsum board suspended ceiling are the same as “light steel keel paper gypsum board partition wall”.

(3)Light steel keel. The light steel keel of the ceiling is divided into the human keel and the non-human keel according to the carrying capacity. There are big keel, middle keel and small keel according to usage. According to the series, there are three series of UC38, UC50, and UC60. These three series are light, medium and heavy keel.