1. (a) Proof load tests of derricks shall be carried out at the same intervals as specified in Section 5022(a) for cranes.

2. (b) Proof load tests and safe working load ratings shall be based on the designed load ratings at the ranges of boom angle or operating radii. Proof loads shall exceed the safe working load (SWL) as follows:

   SWL

   Proof Load

   Up to 20 tons

   25 percent in excess

   20-50 tons

   5 tons in excess

   Over 50 tons

   10 percent in excess

   Proof loads shall be applied at the designed maximum and minimum boom angles or radii or, if this is impracticable, as close to these as practicable. The angles or radii of test shall be in the certificate of test. Proof loads shall be swung as far as possible in both directions. The weight of all auxiliary handling devices such as blocks, hooks, etc., shall be considered a part of the load.

3. (c) After satisfactory completion of a proof load test, the derrick and all component parts thereof shall be carefully examined in all applicable respects to the requirements of Section 5022(d).

Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.

History

1. Amendment filed 8-29-86; effective thirtieth day thereafter (Register 86, No. 39).