Which requirement states the footrest must not exceed 24 inches high?

• A. Factor of Safety
• B. Clearance Requirements
• C. Slack-Chain Device
• D. Code Data Plate

Answer: (B)

Clearance requirements govern the vertical space around moving parts like footrests. The rule that the footrest must not exceed 24 inches high comes from those clearance standards, which set safe limits to keep passengers’ feet, clothing, and bodies clear of other components and moving surfaces. By keeping footrests within this height, riders can step on and off comfortably and safely, reducing the risk of tripping, scraping, or getting caught on higher protrusions. It also helps maintain consistent headroom and clear interaction with the handrail and steps, which is crucial for safe use of escalators and moving walks. The other items—Factor of Safety, Slack-Chain Device, and Code Data Plate—relate to design margins, a safety mechanism for chain tension, and labeling with manufacturer data, respectively, and do not specify a height limit for footrests.