6.2. Ringer Base and Stability

Try these first

1. 1.

   Define 'operating radius' in crane operation.

   Hint

   Think about where the load is in relation to the crane.

2. 2.

   What is the primary function of outriggers?

   Hint

   Consider their location and how they support the crane.

3. 3.

   What is the operating radius in crane operations?

   • Distance from the load to the tipping axis
   • Height of the crane
   • Weight of the crane

   Hint

   Recall what measures the stability of the crane.

4. 4.

   True or False: The ringer base helps prevent tipping backward in cranes.

   • True
   • False

   Hint

   Consider the design purpose of a ringer base.

5. 5.

   A crane has a weight of 6000 kg and a counterweight of 3000 kg at a distance of 5 m from the load line. How do you determine if the crane is stable while lifting a load of 4000 kg?

   Hint

   Remember the moment equilibrium principles.

6. 6.

   Evaluate the impact on lifting capacity and stability if a truck-mounted crane, without proper leveling, is placed on a sloped terrain.

   Hint

   Analyze how uneven ground alters crane's center of gravity.