Why are escalator steps designed to interlock?

Escalator steps are designed to interlock primarily to ensure safety and stability during operation. This interlocking mechanism prevents the steps from getting misaligned or separated from each other, which could pose a serious risk to users. When the steps interlock, they create a continuous surface for passengers to stand on, minimizing the potential for gaps or spaces that could lead to accidents, such as foot entrapment or falls.

The interlocking design also contributes to the structural integrity of the escalator, allowing it to better handle the weight of passengers and the dynamic forces that occur during movement. Overall, this safety feature is a critical aspect of escalator engineering, ensuring the device operates effectively while maintaining a high level of user safety.