Crane Operator Certification Exam Prep · Question
Cribbing under outrigger pads must be constructed to ensure uniform load distribution and prevent crushing. Which configuration is generally most effective for achieving this?
Effective cribbing uses multiple layers of solid timbers, cross-stacked perpendicular to each other, distributed over the entire area of the outrigger mat. This
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Question: Cribbing under outrigger pads must be constructed to ensure uniform load distribution and prevent crushing. Which configuration is generally most effective for achieving this?
Answer options:
- Randomly stacked timbers to fill the void.
- A single layer of planks directly on the outrigger pad. ✅ Cross-stacked layers of solid timbers under full pad area.
- Vertically oriented timbers to maximize height.
Correct answer: Cross-stacked layers of solid timbers under full pad area.
Explanation: Effective cribbing uses multiple layers of solid timbers, cross-stacked perpendicular to each other, distributed over the entire area of the outrigger mat. This maximizes dispersal of the load to achieve adequate ground bearing pressure and prevent concentrated stress.
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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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