Cable trays are categorized into channel-type, tray-type, ladder-type, and grid-type structures, composed of brackets, supports, and installation accessories. They can be independently installed or mounted on various building structures and pipeline supports, showcasing features such as simple structure, aesthetic design, flexible configuration, and easy maintenance. All parts require galvanizing treatment. For outdoor bridge installations on buildings, if located near the sea or in a corrosive area, the material must possess anti-corrosion, moisture-resistant, good adhesion, and high impact strength properties.