Question: What is a rope descent system (RDS)?

Answer: The rule defines RDS as a suspension system that allows a worker to descend in a controlled manner and, as needed, stop at any point during the descent to perform work. An RDS usually consists of a roof anchorage, support rope, descent device, carabiners or shackles, and chair (seatboard). An RDS also is called controlled descent equipment or apparatus, but it does not include industrial rope access systems.