Planned engineered lifts are any lift that exceeds the specific rated crane capacity. Every crane has a maximum load capacity and a planned engineering lift can exceed this maximum capacity, but there are significant risks to this type of lift and it must be carefully planned. Some of the potential risks of a planned engineering lift include brake failure, equipment failure, hoist components breaking, wire ropes breaking, motor controls going out and more. Any failure that occurs with a planned engineering lift can result in injury, damage to the load or to structures, damage to the crane, and more, therefore it should be carefully planned with the chance of an accident occurring being as low as possible.
The American Society of Mechanical Engineers has a protocol for engineered lifts
Engineered lifts are not that dangerous when the specification that was developed by the American Society of Mechanical Engineers is followed. They have developed a specification for when lifts exceed the capacity of the bridge crane, and how to plan and organize those lifts to reduce the chance of an accident as much as possible. The lifts should not exceed more than 125% of the crane’s capacity, it should be performed by a power crane that is rated for at least 5 tons, and it should not be performed more than twice for one crane every 12 months. There are other guidelines that should be followed with a planned engineered lift that are set by the ASME that can reduce the chance of a problem from occurring.
Special cases should be consulted with the manufacturer
If there is a planned engineered lift that exceeds 125% of the crane’s maximum capacity, or is performed more than twice in a 12 month period of time, the manufacturer should be consulted in order to ensure that the lift is safe. There may be some cases where the lift is approved to be safe by the manufacturer, and in other cases it may not be. It depends on the crane’s features. There are several steps that must take place when a planned engineered lift occurs such as inspecting the crane by a qualified professional before and after the lift and more.
The lift must be carried out under controlled conditions
With the proper preparation for a planned engineered lift, it can be very safe and an effective way to lift a load that is greater than the capacity of the crane, but it needs the proper supervision and preparation from start to finish. The lift should be performed under a qualified supervisor with experience in planned engineered lifts, and the proper protocol for the lift as designed by the ASME should be followed. Planned engineered lifts can be a way for facilities to manage loads that would otherwise require the use of a completely new crane, which can be costly, and they can be a cost effective way of handling loads without needing to install new equipment, but they need to be carefully performed in any situation.