Why Do Escalators Have Brushes on the Sides?
Escalators transport people efficiently in malls, airports, and subways worldwide. Black nylon brushes line the stationary side panels adjacent to the moving steps, an often unnoticed detail in everyday use.
These skirt brushes address a specific mechanical challenge in escalator construction.
The Gap Between Steps and Skirts
Moving steps rise or descend between fixed skirt panels. A narrow gap, typically 3-6 millimeters wide, separates the step edges from the skirts. Foreign objects or body parts entering this space risk entrapment and injury.
Deflection for Safety
Skirt brushes, or deflectors, extend slightly over the steps. Made of durable nylon bristles on an aluminum base, they gently nudge feet, shoes, laces, clothing, and debris away from the hazardous gap.
Manufacturer tests show the brushes effectively guide users toward the center, minimizing contact with the skirts.
Development from Incidents
Early escalators lacked such features, leading to entrapment accidents. Safety standards evolved, mandating skirt brushes as a proven upgrade by the late 20th century.
Today, they extend equipment life by reducing debris entry while prioritizing passenger protection.
Practical Design Legacy
Escalator side brushes persist due to their role in bridging mechanical necessity and safety requirements. This simple addition counters the inherent risks of the step-skirt interface.