The bracket is also called the bracket beam because of the function of the lifting beam. The truss supporting the intermediate truss is called the bracket. The bracket is generally a parallel chord. The web is made of a herringbone system with a vertical rod. The definition of the lower bracket is first introduced: in industrial plants, due to industrial or transportation needs, Remove the column on a certain axis, so that the bracket should be set in the large opening position, and the truss of the column should be removed. The brackets are mounted on the posts at both ends.