Swing Into Success 2025: Master the NCCCO Mobile Crane Challenge!

Question: 1 / 400

When may blocking (cribbing) be placed under outrigger beams?

When beams cannot be extended all the way out

To increase capacity

To improve stability

Never

Blocking or cribbing should never be placed under outrigger beams as a standard practice. The integral design and engineering of outriggers are specifically calculated for their intended use, which includes proper extension to distribute the weight of the crane and its load effectively. Placing additional materials like blocking or cribbing can alter the intended load distribution and significantly affect the crane's stability and performance. This can lead to unsafe operating conditions, such as tipping or collapsing.

When outrigger beams are not fully extended, it is crucial to ensure they are properly positioned and utilized as designed rather than compensating with additional materials. The correct method for enhancing stability involves extending the outriggers fully and adjusting the crane's setup in accordance with manufacturer specifications and safety standards. Therefore, it is critical for crane operators to adhere strictly to safe operational practices and avoid modifying the equipment’s intended setup with blocking.

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