Planned engineered lifts involve lifting loads that exceed a crane’s specific rated capacity. Every crane has a maximum load capacity, and a planned engineering lift can exceed this limit. However, these lifts come with significant risks and must be meticulously planned. Risks include brake failure, equipment failure, breaking hoist components, wire ropes snapping, and motor controls failing. Any failure during a planned, engineered lift can result in injury, damage to the load or structures, and crane damage. Thus, careful planning is essential to minimize the risk of accidents.
The American Society of Mechanical Engineers Protocol for Engineered Lifts
Engineered lifts can be safe if the American Society of Mechanical Engineers (ASME) guidelines are followed. ASME has developed specifications for lifts that exceed a crane’s capacity. To reduce accident risks, the lift should not exceed 125% of the crane’s capacity, should be done with a power crane rated for at least 5 tons, and should not be performed more than twice per crane every 12 months. Following ASME’s guidelines helps ensure the safety of these lifts.
Consult the Manufacturer for Special Cases
If a planned engineered lift exceeds 125% of the crane’s maximum capacity or is performed more than twice in 12 months, consult the manufacturer to ensure the lift’s safety. The manufacturer might approve the lift as safe, or they might not, depending on the crane’s features. Steps such as having a qualified professional inspect the crane before and after the lift are crucial.
Controlled Conditions for Safe Lifting
Proper preparation and supervision can make planned, engineered lifts safe and effective for lifting loads greater than the crane’s capacity. The lift should be done under the supervision of a qualified expert experienced in engineered lifts, following ASME’s protocols. These lifts can be a cost-effective alternative to installing new equipment, allowing facilities to manage heavier loads without needing a new crane. However, they must always be performed carefully to ensure safety.