Crane operating envelope failures can lead to accidents. Which statement is true?

• A. They can cause an accident
• B. They never cause accidents
• C. They always cause accident
• D. They have no safety impact

Answer: (A)

The operating envelope establishes the safe range of movement, reach, height, and load for a crane. When that envelope fails, safeguards that keep crane motion within those limits are compromised, which raises the risk of tipping, overloading, collisions with structures or workers, or load drops. Because of that increased risk, the statement that envelope failures can lead to an accident is true. The other options imply no risk or universal outcomes, which isn’t accurate—envelope failure does not guarantee an accident in every case, and it clearly has safety implications.