Why do escalators have brushes

Overview

Escalator brushes, also known as skirt brushes or skirt deflectors, are safety devices installed along the sides of escalator steps to prevent accidents and injuries. The history of escalator safety features dates back to the early 20th century when escalators first became common in department stores and transit systems. Early escalators had significant safety issues, with numerous reports of clothing, shoes, and even limbs becoming trapped in the gap between moving steps and stationary side panels. In response to growing safety concerns, manufacturers began developing protective devices in the 1970s and 1980s. The American Society of Mechanical Engineers (ASME) first addressed escalator safety in their A17.1 Safety Code for Elevators and Escalators, with specific requirements for skirt brushes being added in the 1990 edition. Today, escalator brushes are mandatory safety features in most countries, required by building codes and safety regulations worldwide.

How It Works

Escalator brushes function through a simple but effective mechanical design. The brushes are installed along both sides of the escalator, running parallel to the direction of travel. They consist of multiple rows of flexible bristles made from durable materials like nylon or polypropylene, typically arranged in a staggered pattern. As the escalator steps move upward or downward, the brushes create a physical barrier that extends slightly into the dangerous gap between the moving steps and stationary skirt panels. When clothing, shoelaces, or other items approach this gap, the brushes provide tactile feedback to alert passengers of the danger zone. The bristles also serve to sweep away small debris like sand, dirt, or loose items before they can become trapped. The brushes are mounted on aluminum or stainless steel backing plates that are securely attached to the escalator structure, with the bristle height carefully calibrated to provide maximum protection without interfering with normal escalator operation.

Why It Matters

Escalator brushes play a crucial role in public safety, preventing thousands of injuries annually worldwide. According to the U.S. Consumer Product Safety Commission, escalator-related injuries result in approximately 10,000 emergency room visits each year in the United States alone, with many involving entrapment in the step-skirt gap. These safety devices are particularly important for protecting vulnerable populations including children, elderly passengers, and people with disabilities who may have difficulty maintaining proper positioning on escalators. Beyond injury prevention, escalator brushes also help reduce maintenance costs by preventing debris from damaging escalator mechanisms and reducing the frequency of mechanical failures. Their presence in public spaces like airports, shopping malls, and transit stations contributes to overall public confidence in transportation infrastructure and commercial facilities, making them essential components of modern urban safety systems.