steel keel is a metal frame for construction made of high-quality continuous hot-dip galvanized strip as raw material and rolled by cold bending process. It is used to decorate non-load-bearing walls and building roofs with lightweight boards such as gypsum board and decorative gypsum board. It is suitable for the modeling decoration of roofs of various buildings, the basic materialsof internal and external walls of buildings and scaffolding ceilings.