If the center of gravity shifts or is not correctly aligned, the crane closer to the center of gravity could become overloaded, resulting in a failure. It is also necessary to account for any conditions that could cause the center of gravity to shift, such as wind blowing on the load or fluids in or on the load. Center of Gravity: It is necessary to know the center of gravity of a load to be able to balance the load correctly and distribute the load between cranes as desired.Here are a few factors to consider when planning a tandem lift: When a lift involves more than one crane, there are many factors that could cause an overload situation to arise, and they must be accounted for when the plan is developed. For the lift to be safe, the cranes must not be overloaded or side loaded. The goal of a detailed lifting plan is to ensure that the lift can be completed safely. Finally, the lift director must review the complete plan in a meeting with all workers who will be involved in the operation. The lift must also be directed by a person who meets the criteria for both a competent person and a qualified person, or by a competent person assisted by one or more qualified persons. Tandem lifting plans must be developed by a qualified person, and if the qualified person determines that engineering expertise is required, the employer must ensure it is provided. OSHA 1926.1432 outlines a few requirements for tandem lifting plans. The first step in safely executing a tandem crane lift is to prepare a rigging plan that will investigate all possibilities of overloading the cranes involved.
![dual crane lift regulations dual crane lift regulations](https://nesscampbell.com/wp-content/uploads/2019/01/spyder-crane-nesscampbell.jpg)
However, tandem lifts have the potential to become very dangerous if not handled properly.
![dual crane lift regulations dual crane lift regulations](https://cdn.shopify.com/s/files/1/0283/3239/2581/articles/True_vertical_lift_hoists_60_1200x.jpg)
![dual crane lift regulations dual crane lift regulations](https://www.craincoinc.com/wp-content/uploads/2020/01/dual-crain-lift-1.jpg)
Tandem lifts can be very useful, and they are often used to place structural beams for bridges, move large loads, and lift long components from horizontal to vertical positions. When lifting heavy or oddly shaped objects, it is sometimes desirable to use two cranes in tandem rather than a single higher-capacity crane.