Ensuring Safe Multi-Crane Lifts: An Insurance Broker’s Perspective

Multi-crane lifts are complex operations that require meticulous planning and execution. Safety is paramount in this high-risk field. Insurance policies often require crane operators to meet Australian standards when undertaking multi-lifts, and this article explores key considerations to ensure these standards are met.

A common requirement on insurance policies in respect of Multi-lifts is to ensure you are meeting Australian standards and undertaking appropriate risk mitigation procedures when undertaking this work.

Lift Planning

1. Documented Risk Assessment: Before commencing any multi-crane lift, a comprehensive risk assessment is crucial. This document should record known hazards and outline the relevant controls, setting the stage for a safe operation.
2. Capacity Calculations: The most critical aspect of the lift plan for tandem lifts is calculating the required crane capacity. This calculation involves understanding the load share for each crane, accounting for all components under the boom head, and adding a percentage factor based on the number of cranes involved. This factor ensures that the cranes can handle the load safely.
3. Site Assessment: A thorough site visit is essential to assess environmental conditions, overhead structures, ground conditions, access, and any site restrictions. This information informs the lift plan and ensures the safety of all personnel involved.
4. Crane Selection: Cranes used in multi-lift operations should be of the same type, such as telescopic mobile cranes. If different types are used, the lift is classified as a designed lift, which requires additional considerations.
5. Load Distribution: Special attention must be given to determining the centre of gravity, especially for complex structures and loads. Understanding load sharing for rigid structures is critical to prevent load shifts during the operation.
6. Stiffness-Strength Analysis: An analysis of the stiffness and strength of the load is necessary to identify any potential load shift effects if the cranes fall out of sync.

On the Job

1. Review and Document Changes: The lift plan should be reviewed with all personnel involved in the operation. Any changes to the plan should be documented and communicated to the entire lift team.
2. Licensing Requirements: In Australian-based work, individuals involved in rigging work should hold a High-Risk Intermediate Rigging License (RI) at a minimum.
3. Senior Lift Supervisor: Appoint a senior lift supervisor who is responsible for coordinating the lift and holds a RI license as a minimum. This individual is the single point of accountability.
4. Communication: Implement and adhere to the communication plan outlined in the lift plan. Effective communication is crucial for safe operations.
5. Auxiliary Hook: Dropping the auxiliary hook around 4m can help maintain vertical hoist ropes and prevent side loading on the boom.
6. Load Transfers: Be aware of Passover load transfers and tailing load transfers, taking precautions to ensure safe handling.
7. Sequential Movements: Perform one motion at a time and in the same direction. Ensure all cranes travel in the same direction and do not exceed load limits specified in the lift plan.
8. Extreme Care and Low Speeds: Execute the lift with extreme care and at low speeds to minimize risks.
9. Stop the Lift if Necessary: Anyone involved in the lift should have the authority to stop the operation if something doesn’t seem right, and consult with the senior lift engineer.

Further Resources:

To ensure compliance and safety in multi-crane lifts, it is essential to familiarize oneself with applicable guidelines and standards. Some key references include:

1. Australian Standard AS 2550.1 – Cranes, hoists, and winches – Safe use, General Requirements – Section 6.28 Multiple Hoist or Crane Operation.
2. Australian Standard AS 2550.5 – Cranes, hoists, and winches – Safe use, Mobile cranes – Section 3 Selection.
3. The Crane Association of New Zealand’s Crane Safety manual, Section 9: Part D, which covers multi-crane lifts in detail.

It is important to ensure that crane operators adhere to the necessary safety standards for multi-crane lifts. Following these guidelines and standards, comprehensive lift planning, and maintaining rigorous safety protocols are essential steps to mitigate risks and ensure the safety of all personnel involved in multi-crane lift operations. By adhering to these practices, you can help prevent accidents, minimise insurance claims, and promote a culture of safety in this high-risk industry.