An escalator is a type of vertical transportation device used to move people between different floors of a building. It consists of a continuously moving staircase driven by an electric motor, designed to carry passengers safely and efficiently from one level to another. Escalators are widely installed in public buildings such as shopping malls, airports, railway stations, hotels, hospitals, and commercial complexes where a large number of people need to move quickly between floors. Unlike elevators, which carry people in a closed cabin, escalators allow continuous passenger movement without waiting time, making them suitable for areas with heavy pedestrian traffic. Structurally, an escalator consists of several important components that work together to ensure smooth and safe operation. The main components include the truss, steps, step chain, drive motor, handrail system, landing platforms, and control system. The truss is the structural framework of the escalator and supports all the internal parts. It is usually made of steel and extends between the upper and lower landing platforms. The steps are the moving stair-like elements on which passengers stand. These steps are connected by a step chain that moves them in a continuous loop. The working principle of an escalator is based on a motor-driven chain system. An electric motor located at the top of the escalator provides the power required to move the steps. The motor drives a gear mechanism which rotates the main drive shaft. This shaft moves the step chain, causing the steps to travel along a guided track. As the chain moves, the steps remain horizontal while traveling on the inclined section, forming a staircase that passengers can stand on comfortably. When the steps reach the upper landing platform, they flatten out and move under the comb plate, which is a specially designed plate with teeth that fit into grooves in the steps. This design ensures smooth entry and exit for passengers. After reaching the landing, the steps continue moving underneath the escalator and return to the bottom to repeat the cycle. Thus, the escalator works as a continuous loop system where steps circulate from bottom to top and back again. Another important part of the escalator is the handrail system. The handrail moves at the same speed as the steps and provides support and balance to passengers while traveling. The handrail is made of rubber or synthetic materials and is driven by a separate drive mechanism synchronized with the movement of the steps. This synchronization ensures passenger safety and stability during travel. Safety features are an essential aspect of escalator operation. Modern escalators are equipped with various safety devices such as emergency stop buttons, step demarcation lights, skirt panels, comb plate safety switches, and speed sensors. Emergency stop buttons allow passengers or operators to stop the escalator immediately in case of danger. Comb plate safety switches detect any obstruction at the landing and stop the machine to prevent accidents. Speed sensors monitor the movement of steps and stop the system if abnormal speed or malfunction occurs. These