A crane having a boom of 50m is dying to lift a container of 9000kg the maximum lifting capacity of the crane is 6000kg every time the crane rear wheels leave the ground instead of lifting the container. Explain what should the driver do to keep the crane stable
To keep the crane stable while attempting to lift a container that exceeds the maximum lifting capacity, the driver should follow these steps:
1. Assess the weight distribution: Determine the exact weight and center of gravity of the container. This will help ensure proper loading and balance during the lifting process.
2. Use rigging equipment: Employ rigging tools such as slings or shackles to distribute the load evenly across multiple lifting points. This will help prevent the crane from becoming unbalanced or tipping over.
3. Calculate the load: Ensure that the total weight of the container and rigging equipment does not exceed the maximum lifting capacity of the crane. If it does, the driver should not attempt to lift the load.
4. Position the crane: Place the crane on stable and level ground, ensuring that the outriggers are correctly extended to provide maximum stability.
5. Use counterweights: If the crane is equipped with counterweights, the driver should position them properly to offset the weight of the load being lifted. This will help maintain stability and prevent tipping.
6. Follow the load chart: Consult the crane's load chart, which provides information on its lifting capacity at different boom lengths and boom angles. Ensure that the combination of boom length, boom angle, and load weight is within the crane's safe lifting capacity.
7. Engage the brakes: Before attempting to lift the load, the driver should engage the crane's brakes to prevent the crane from moving while under load.
8. Lift gradually: The driver should slowly and smoothly lift the load, ensuring that all movements are controlled. Abrupt or jerky movements can destabilize the crane.
9. Monitor the load: Constantly monitor the load and its movement during the lifting process. If there are any signs of instability or imbalance, the driver should immediately lower the load and reassess the situation.
10. Work within the crane's limits: If the weight of the load exceeds the maximum lifting capacity of the crane, the driver should not attempt to lift it. Overloading a crane can result in serious accidents and damage to the equipment.
It is essential for the driver to prioritize safety at all times and strictly adhere to the crane's lifting capacity and operational limitations. If uncertain or inexperienced, the driver should consult a qualified supervisor or engineer for guidance.