For a recently backfilled trench 12 feet deep, what is the minimum distance from the trench edge to the outrigger?

Study for the Basic Principles of Cranes Test. Explore with flashcards and multiple choice questions, each question has hints and explanations. Prepare yourself effectively for the test!

Multiple Choice

For a recently backfilled trench 12 feet deep, what is the minimum distance from the trench edge to the outrigger?

Explanation:
Outrigger stability relies on spreading the crane’s load over a wide, solid base and keeping that base away from any edge that could fail or give way. When there’s a trench, the safest practice is to set the outrigger pads no closer to the trench edge than the trench is deep. That distance provides enough counter-moment and ground support so the crane won’t tip or the ground beneath the outriggers from collapsing. So, for a trench that is as deep as this one, you place the outriggers at least that far from the trench edge. Placing them closer compromises stability, while going farther than the minimum isn’t necessary for the required safety margin and can unnecessarily limit lifting capacity.

Outrigger stability relies on spreading the crane’s load over a wide, solid base and keeping that base away from any edge that could fail or give way. When there’s a trench, the safest practice is to set the outrigger pads no closer to the trench edge than the trench is deep. That distance provides enough counter-moment and ground support so the crane won’t tip or the ground beneath the outriggers from collapsing. So, for a trench that is as deep as this one, you place the outriggers at least that far from the trench edge. Placing them closer compromises stability, while going farther than the minimum isn’t necessary for the required safety margin and can unnecessarily limit lifting capacity.

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