In the context of hydraulic telescopic material handlers, when the boom is extended, the load capacity tends to:

• A. decreases
• B. increases
• C. remains the same
• D. fluctuates

Answer: (A)

Extending the boom increases the lever arm distance between the load and the machine’s base, which raises the overturning moment the machine must resist. The load capacity is set to keep the unit stable at a given setup, so when reach grows, the same stability margin can handle less weight. That’s why the rated capacity decreases as the boom is extended. The manufacturer’s load chart shows lower capacities at greater reaches and different configurations. The capacity isn’t higher with more reach, it isn’t inherently constant, and it doesn’t fluctuate randomly under the same setup—it follows a predictable decrease with increased extension.