If the LMI fails, which data should you consult?

If the LMI fails, which data should you consult?

• A. The operator's experience
• B. The load chart and the boom angle
• C. The manufacturer's manual
• D. A digital scale

Answer: (B)

When the Load Moment Indicator isn’t working, you must rely on the machine’s rated load data that corresponds to your current setup. The load chart is what translates your boom length and configuration (including the boom angle) into a safe lifting limit. The key is that the chart accounts for how the moment changes with different angles and radii, so you can determine a safe maximum load for the exact position you’re using. Without the LMI, you compare the weight you plan to lift against that chart at the current boom angle to ensure you’re within safe limits. Other options don’t provide the precise configuration-specific data you need: operator experience can help, but it isn’t a substitute for the chart; the manufacturer’s manual may cover procedures but not the live limits for your exact setup; a digital scale tells you weight but not how the moment varies with angle and reach.

When the Load Moment Indicator isn’t working, you must rely on the machine’s rated load data that corresponds to your current setup. The load chart is what translates your boom length and configuration (including the boom angle) into a safe lifting limit. The key is that the chart accounts for how the moment changes with different angles and radii, so you can determine a safe maximum load for the exact position you’re using. Without the LMI, you compare the weight you plan to lift against that chart at the current boom angle to ensure you’re within safe limits.

Other options don’t provide the precise configuration-specific data you need: operator experience can help, but it isn’t a substitute for the chart; the manufacturer’s manual may cover procedures but not the live limits for your exact setup; a digital scale tells you weight but not how the moment varies with angle and reach.