Crane Operator Certification Exam Prep · Question
What is the primary reason for proper cribbing and matting under outriggers, even when the ground appears firm?
Proper cribbing and matting are essential to spread the high, concentrated loads from the outrigger pads over a larger area, reducing the ground bearing pressur
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Question: What is the primary reason for proper cribbing and matting under outriggers, even when the ground appears firm?
Answer options:
- To provide additional height for better visibility.
- To prevent damage to the outrigger pads themselves. ✅ To distribute the concentrated load from outriggers over a larger surface area.
- To increase the overall aesthetic appeal of the crane setup.
Correct answer: To distribute the concentrated load from outriggers over a larger surface area.
Explanation: Proper cribbing and matting are essential to spread the high, concentrated loads from the outrigger pads over a larger area, reducing the ground bearing pressure to within the soil's capacity and preventing ground failure, as mandated by CSA Z150 Clause 5.2.1.
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Question explanations
- According to most Canadian provincial regulations, who is ultimately responsible for the safe operation of a c
- A crane's rated capacity decreases as the load radius:
- What is the minimum number of full wraps of wire rope that must remain on a hoist drum when the hook is in its
- Before setting up a mobile crane, what is the most important factor to assess regarding ground conditions?
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