Derricks
Post-Assembly Approval and Testing
Before lifting a load, post-assembly planning and functional testing must be performed.
Derricks must be load tested prior to lifting loads.
The following requirements apply to new or reinstalled derricks:
- Anchorages: Anchorages, including the structure to which the derrick is attached (if applicable), must be approved by a qualified person.
- Functional test: Prior to initial use, new or reinstalled derricks must be tested by a competent person with no hook load to verify proper operation. This test must include the following:
- lifting and lowering the hook(s) through the full range of hook travel
- raising and lowering the boom through the full range of boom travel
- swinging in each direction through the full range of swing
- actuating the anti-two-block and boom hoist limit devices (if provided)
- actuating locking, limiting, and indicating devices (if provided)
- Load test: Prior to initial use, new or reinstalled derricks must pass a load test conducted by a competent person. Test loads must be at least 100% and no more than 110% of the rated capacity, unless otherwise recommended by the manufacturer or qualified person, but in no event must the test load be less than the maximum anticipated load. The test must consist of:
- hoisting the test load a few inches and holding to verify that the load is supported by the derrick and held by the hoist brake(s)
- swinging the derrick, if applicable, the full range of its swing, at the maximum allowable working radius for the test load
- booming the derrick up and down within the allowable working radius for the test load
- lowering, stopping, and holding the load with the brake(s)
- Test documentation: The functional and load tests must be documented. The document must contain the date, test results, and name of the tester. The document must be retained until the derrick is retested or dismantled, whichever occurs first. All such documents must be available during the applicable document retention period to all persons who conduct required inspections (see section 1412).
Knowledge Check Choose the best answer for the question.
7-7. Prior to initial use, new or reinstalled derricks must pass a load test conducted by a competent person. The test loads must be at least _____ of the rated capacity.
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