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To determine if a 60-degree angle of loading has been achieved between the slings and the load when rigging a load with two sling legs and a center of gravity in the middle, you can follow these steps:
Ensure Proper Sling Attachment: Attach the slings securely to the lifting points on the load, ensuring they are evenly spaced and properly aligned.
Measure the Load Height: Measure the distance from the lifting points to the center of gravity of the load. This will help in determining the correct sling angle.
Calculate the Sling Length: Determine the length of each sling leg by adding half of the load height to the horizontal distance between the lifting points.
Position the Sling Legs: Position the sling legs so that they are evenly spaced and parallel to each other. Ensure that they are properly aligned with the lifting points and free from any twists or knots.
Use a Protractor or Angle Measuring Tool: Utilize a protractor or an angle measuring tool to measure the angle between each sling leg and the horizontal plane. Ensure that the angle is approximately 60 degrees for balanced loading.
Adjust as Needed: If the measured angle deviates from 60 degrees, make necessary adjustments to the sling lengths or positioning to achieve the desired angle. Ensure that the load is evenly distributed between the sling legs.
Verify Stability: Once the 60-degree angle of loading is achieved, visually inspect the rigging setup to ensure load stability. Confirm that the slings are properly seated on the lifting points and there is no excessive stress or strain on the rigging components.
It is important to follow industry best practices, consult relevant standards and guidelines, and consider the specific characteristics of the load and lifting operation when rigging a load with two sling legs and a center of gravity in the middle. If you are unsure or have specific concerns, it is recommended to consult with qualified engineers or lifting specialists for further guidance.
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