A cable ladder, also known as a ladder cable tray, is a support system that consists of two longitudinal side rails connected by individual rungs. These rungs are spaced at regular intervals and provide a structure that resembles a ladder—hence the name. Choosing the right one depends on cable type, load requirements, environment, and long-term maintenance needs. What Is a Cable. This blog clearly explains what cable trays and cable ladders are, outlines their key differences, and provides practical guidance to help you select the right solution for your installation. Each cable tray type performs a different function and comes in various materials such as aluminum, galvanized steel, and FRP.