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Crane Operator Certification Exam Prep · Question

Before extending outriggers on a mobile crane, what is the primary consideration to ensure stability according to CSA Z150?

CSA Z150, Section 5.3.1.2, emphasizes that the ground's bearing capacity must be adequate to support the crane, the load, and any counterweight. This is paramou

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Question: Before extending outriggers on a mobile crane, what is the primary consideration to ensure stability according to CSA Z150?

Answer options:

  • Ensuring the ground is perfectly level to within 0.5 degrees. ✅ Confirming the ground's bearing capacity is adequate for the imposed loads.
  • Placing dunnage larger than the outrigger pads.
  • Verifying that the outrigger pins are fully engaged.

Correct answer: Confirming the ground's bearing capacity is adequate for the imposed loads.

Explanation: CSA Z150, Section 5.3.1.2, emphasizes that the ground's bearing capacity must be adequate to support the crane, the load, and any counterweight. This is paramount to prevent sudden ground failure and crane instability.

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