3.3. Using Load Charts for Lifting Capacity

Try these first

1. 1.

   What is the purpose of outriggers in crane operation?

   Hint

   What do outriggers do?

2. 2.

   What should you do if the soil condition is weak?

   Hint

   What can you use to provide support?

3. 3.

   What is the minimum safe distance to keep from high voltage lines according to OSHA?

   • 2 meters
   • 3 meters
   • 5 meters

   Hint

   Think about safety distances mentioned.

4. 4.

   True or False: Wind speeds greater than 72 kilometers per hour require operators to continue crane operations.

   • True
   • False

   Hint

   Recall what should be done in high winds.

5. 5.

   A crane needs to lift a load from a level 5 meters tall and reach a height of 50 meters. Using a range diagram, how do you calculate the required boom length if the load is 15 meters horizontally away?

   Hint

   Look for the intersection on the diagram, remembering to consider the full height.

6. 6.

   Determine the maximum lifting capacity of a crane with a 24,500 kg capacity at a 25m radius when the hook and sling weigh 1,800 kg.

   Hint

   Calculate the net load by subtracting the weight of the rigging from the total capacity.