What is the operational speed for lowering a platform during a proof test?

The operational speed for lowering a platform during a proof test is set at 150 feet per minute (fpm) to ensure a controlled and safe descent. This speed allows for proper inspection and verification of the platform's stability and structural integrity under load. Operating at this specified speed helps to mitigate risks associated with rapid descents, such as uncontrolled movements or sudden jolts that could compromise safety. Standards and guidelines often dictate such operational speeds during testing to provide a balance between efficiency and safety.