Cable trays are structural support systems designed to organize, protect, and route electrical cables in industrial and commercial environments. Below are 100 questions that comprehensively cover the basic definitions, material classifications, selection. A cable tray (or simply a cable tray) is a rigid structural system that closely supports cables and consists of trough-, tray-, or stepped-type straight sections, elbows, tees, and crosses, as well as brackets (arm-type supports) and hangers. They provide a safe pathway for power, control, and communication cables while improving ventilation and simplifying maintenance.