Tandem lifting is a lifting operation where two or more cranes work together to lift a single load. It’s used when a load is too heavy, too long or too awkwardly shaped for one crane to lift safely on its own.
Rather than a single crane carrying the full weight, each crane in a tandem lift takes a portion of the load. Their movements are carefully synchronised throughout the lift to keep the load stable and prevent any one crane from being overloaded.
How Does Tandem Lifting Work?
Also known as dual lifting or multi-crane lifting, tandem lifting typically uses two cranes of similar capacity working in coordination. Each crane supports part of the load’s weight, with movements synchronised to maintain stability and avoid overstressing any single lifting point.
Common examples of tandem lifting include:
- Two cranes lifting a long steel beam together
- A main crane and an assisting crane placing a large module onto a platform
- A mobile crane and a crawler crane working together to rotate and position heavy equipment
When Is Tandem Lifting the Right Solution?
Tandem lifting is used whenever a single crane cannot perform the lift safely or practically. This is typically the case when:
- The load exceeds one crane’s safe lifting capacity
- The load is long or asymmetrical, needing multiple pick points for stability
- Site constraints such as limited space, restricted access or obstacles limit where a single crane can be positioned
- Precision positioning is required, and a second crane provides better control
- Load distribution needs to be balanced across more than one lifting point
A competent person must assess whether a tandem lift is necessary and determine what planning and risk assessment is required before the lift proceeds.
Key Considerations for a Safe Tandem Lift
Tandem lifting is more complex than a single-crane lift, so it needs careful planning and close supervision throughout. Before any tandem lift takes place:
- A detailed lifting plan should be drawn up by an engineer, covering load distribution, crane capacities and rigging arrangements
- Load sharing calculations need to confirm how the weight is split between cranes
- Environmental factors, particularly wind, should be assessed for their effect on load stability
- Communication between all those involved must be clear and continuous, often using both radios and hand signals
- Local regulations should be checked, as health and safety requirements for tandem lifting vary by country
Depending on the nature of the lift, coordination with local authorities or organisations may also be needed, particularly where there’s any risk to the public or nearby infrastructure.
Discover Industrial Lifting Solutions at Metreel
Metreel supplies a full range of industrial lifting equipment, including overhead cranes, gantry cranes and monorails, suited to complex lifting operations including tandem lifts.
Explore our full mechanical handling range or get in touch for advice on planning your next lifting operation.
Get in touch or call 0115 647 0422.