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821 Cranes and Derricks Safety II
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Derricks

Repaired and Modified Derricks

Derricks that have had repairs, modifications, or additions affecting the derrick's capacity or safe operation must be evaluated by a qualified person to determine if a load test is necessary. If it is, load testing must be conducted and documented.

Jumping

The process of jumping a derrick (adding sections to raise the height of the crane) must be supervised by the Assembly/Disassembly (A/D) director.

Power Failures

If power fails during operations, the derrick operator must safely stop operations.

This must include setting all brakes or locking devices and moving all clutch and other power controls to the off position.

Knowledge Check Choose the best answer for the question.

7-8. Jumping a crane is conducted under the supervision of the _____.