How to use the outrigger force calculator

Introduction:

This guide explains how to calculate the forces exerted on a crane’s outriggers based on the load weight, boom configuration, and crane setup. The tool helps ensure that the crane is operating within safe parameters by analyzing outrigger forces under various conditions. Keep in mind that the results are indicative, and the tool may display unrealistic configurations that the crane cannot handle.

Step-by-Step Instructions:

Accessing the Calculator:

1. Navigate to the ‘Tools’ menu on Hoeflink.
2. Open the Outrigger Force Calculator.
   • If this tool is not visible on your account. Please contact your organizations Hoeflink manager. A subscription is needed.

Inputting Crane and Load Details:

1. Select the correct device model: Select the correct crane model.

2. Outrigger Angles:

   • Use the sliders to adjust the angle (0° to 90°) for each outrigger.
   • Verify the outrigger setup using the visual diagram.

3. Load Weight:

   • Enter the weight of the load to be lifted in kilograms (e.g., 300 kg or 500 kg).

4. Boom Configuration:

   • Set the main boom angle (0° to 90°).
   • Configure the jib attachment (toggle switch) and its settings:
     • Jib angle (e.g., 35°).
     • Jib length (e.g., 4,275 mm).

5. Counterweight Extension:

   • Choose from Retracted, Extended, or No counterweight in the dropdown menu.

6. Slewing Angle:

   • Set the slewing angle of the crane (e.g., -45° for lateral movement).

7. Hoist Distance:

   • Enter the horizontal distance to the load in meters (e.g., 7 m or 10 m).
8. Outrigger Length:
   • Set the extension length (0 mm to maximum) for each outrigger.

Interpreting the Results:

1. Outrigger Forces:

   • The tool displays the calculated forces acting on each outrigger in the diagram.
   • Values include:
     • Max Force: The maximum permissible load for each outrigger.
     • Calc Force: The calculated force exerted based on the crane configuration and load.

2. Identifying Unsafe Configurations:

   • If the Calc Force exceeds the Max Force, the crane is operating beyond safe limits.
   • The diagram visually highlights these situations, helping you adjust the setup.

3. Load Distribution:

   • Compare forces on each outrigger to evaluate stability. Uneven distribution may indicate unsafe conditions.

Using This Information Effectively:

1. Safety Assessment:

   • Verify that all outriggers are operating within safe force limits.
   • Avoid configurations where the Calc Force exceeds the Max Force.

2. Adjustments for Stability:

   • Modify outrigger angles, extensions, or boom positions to reduce calculated forces.
   • Consider reducing load weight or decreasing hoist distance if forces are too high.

3. Planning Lifting Operations:

   • Use the tool to simulate different setups and determine the safest configuration for the task.
   • Avoid unrealistic scenarios.

4. Prevent Damage:

   • Prevent excessive stress on outriggers and other components by adhering to the results of the tool.

Disclaimer:

• The results provided by the calculator are indicative only. They must not replace a detailed engineering assessment or operator judgment.
• Always operate cranes within their specified load charts and safety guidelines.
• Consult your dealer or a certified service point for guidance on complex scenarios.

For further assistance, refer to the crane’s manual or contact your dealer through hoeflon.com.