The load weight of a personnel lift must not exceed what fraction of the hoist's rated capacity for the working radius?

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Multiple Choice

The load weight of a personnel lift must not exceed what fraction of the hoist's rated capacity for the working radius?

Explanation:
Stability depends on how far the lift is extended. As the boom reaches outward (larger working radius), the tipping moment increases, so the load must be reduced to stay within safe limits. The rated capacity is stated for each radius, and using half of that capacity at the given radius provides a safety margin for dynamic movements, operator shifts, and wind. So, the load weight must not exceed half of the hoist’s rated capacity for the working radius. A smaller limit would be overly conservative, while larger limits would leave little room for dynamic effects and could compromise stability.

Stability depends on how far the lift is extended. As the boom reaches outward (larger working radius), the tipping moment increases, so the load must be reduced to stay within safe limits. The rated capacity is stated for each radius, and using half of that capacity at the given radius provides a safety margin for dynamic movements, operator shifts, and wind.

So, the load weight must not exceed half of the hoist’s rated capacity for the working radius. A smaller limit would be overly conservative, while larger limits would leave little room for dynamic effects and could compromise stability.

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