What type of lift requires detailed calculations and planning due to potential hazards?

The answer is critical lift, as this type of lift involves unique challenges and hazards that necessitate thorough planning and detailed calculations to ensure safety and efficiency. Critical lifts often involve heavy loads, complex rigging setups, or lifts conducted in challenging environments, where even a small error can lead to significant safety risks or equipment failure. Because of these factors, a comprehensive lift plan is essential, which includes assessing the weight of the load, the lifting equipment's capacity, the stability of the ground, potential weather impacts, and the presence of nearby obstacles or personnel. This level of detailed planning is vital in mitigating risks associated with such lifts, which is why they are designated as "critical."