How should duplex safety devices function according to the B44 Code?

Duplex safety devices, as outlined in the B44 Code, are designed to enhance the safety and reliability of elevating devices. These devices work to ensure that if one safety device fails, the other can still perform its intended function, thereby preventing accidents or malfunctions.

The correct answer indicates that duplex safety devices should operate both simultaneously. This means that both safety devices engage together to provide an added layer of protection, ensuring that in the event of an emergency situation, there is no delay or reliance solely on one device. Operating simultaneously allows the safety systems to effectively respond to hazardous conditions without any time lag, which is critical in maintaining passenger safety during operation.

Understanding the requirement for simultaneous action emphasizes the importance of redundancies in safety mechanisms within elevating devices, ensuring that the potential for failure is minimized, and that safety is prioritized. This is crucial for maintaining compliance with safety regulations and ensuring passenger confidence in the elevating device's operation.