Type A safeties are limited to elevators with a rated speed of not more than what speed?

Type A safeties are designed to operate within a specific range of elevator speeds to ensure safe operation. These safeties are typically limited to elevators with a rated speed of not more than 150 feet per minute (FPM). This speed restriction is in place because Type A safeties utilize certain mechanisms and materials that are suited for lower-speed operations, providing the necessary braking and stopping capabilities effectively at those speeds.

Elevators rated above this speed generally require more advanced safety features due to the increased dynamics involved at higher speeds. Therefore, recognizing the limitations of Type A safeties is critical for compliance with safety standards and regulations in elevator design and maintenance.