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821 Cranes and Derricks Safety II
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Safety Devices

The following additional safety devices are required for floating cranes and derricks:

  • barge, pontoon, vessel, or other means of flotation list and trim device
  • positive equipment house lock
  • wind speed and direction indicator (if a competent person determines that wind is a factor that needs to be considered)

Working with a Diver

When a crane/derrick is used to lift a diver or divers into and out of the water, it must not be used for any other purpose until all the divers are back on board.

When lifting a diver, cranes/derricks cannot be used for other purposes.

Land Cranes/Derricks on Vessels/Flotation Devices

The rated capacity must be reduced to take into account the additional sources of instability (list, trim, wave action, and wind) resulting from operating on water. Alternative means of physical attachment and an exception to the requirement for physical attachment are specified.

Equipment Designed for Use on Vessels/Flotation Devices

Requirements for maximum list, trim, and wind speed are specified. Additional rules to ensure the structural integrity and stability of the equipment apply to employer-made (as opposed to manufacturer-made) equipment.

Knowledge Check Choose the best answer for the question.

8-2. Which additional safety device is required for floating cranes and derricks on a barge?