Light steel keel is a kind of skeleton material used in ceiling engineering, and its specific gravity varies in different applications. In the wall keel, ceiling keel, partition wall keel, outer wall keel, upper ceiling keel and non-upper ceiling keel, the specifications and cross-sectional dimensions of light steel keel are also different. According to relevant information, the proportion of light steel keel is between 50 and 150 types, and the specific value depends on the type and specification of the keel. The advantages of light steel keels include dry work, low energy consumption, flexible space division, easy removal, good decorative effect and stable performance