A rigid structural system consisting of straight sections, bends, tees, and tees, as well as support arms (arm supports), hangers, and other components of trough type, tray type, or stepped type, with tightly connected supporting cables, is called a cable tray (referred to as a cable tray).Cable trays are divided into trough type, tray type, ladder type, grid type and other structures, consisting of brackets, brackets, and installation accessories. The cable tray inside the building can be erected independently or attached to various buildings and pipe gallery supports. It should reflect the characteristics of simple structure, beautiful appearance, flexible configuration, and convenient maintenance. All parts need to be galvanized. The cable tray installed outdoors outside the building, if located near the seaside or in a corrosive area, must be made of materials with anti-corrosion, moisture resistance, good adhesion, and high impact strength.