When is a lift considered 'critical' and requires additional controls?

• A. When the weather is sunny
• B. When the load is less than 100 pounds
• C. When there are no wind gusts
• D. When it involves near power lines, multi-crane lifts, heavy loads, or operating near limits of capacity

Answer: (D)

In a crane operation, a lift is considered critical when there are factors that significantly increase risk and therefore require extra controls and planning. This is true when the lift involves near power lines, involves more than one crane, uses a very heavy or near-capacity load, or is performed close to the crane’s rated capacity. Each of these conditions raises the chance of electrocution, crane coordination problems, load sway, or tipping, so a heightened level of safety measures is needed—such as a written lift plan, additional rigging, a qualified supervisor, spotters, and tighter load calculations.

By contrast, sunny weather, no wind gusts, or a load well below the crane’s capacity are standard conditions in many lifts and do not by themselves trigger the extra controls of a critical lift.