On a truck-crane, what is the purpose of outriggers?

• A. Increase lift capacity
• B. Stabilize the frame
• C. Prevent wheel wear
• D. Improve steering control

Answer: (B)

Outriggers provide stability for a truck-crane. When lifting, the load creates a tipping moment on the truck frame. Extending the outriggers and setting pads on solid ground spreads that load over a wider base, transferring weight to a larger area and keeping the crane from tipping or swaying. This allows safe operation at the required reach and lift while the crane is stationary. They don’t inherently increase the crane’s lift capacity, nor do they prevent wheel wear or directly improve steering control. Use them on firm, level ground and retract them when the crane is traveling.