Swinging loads can be controlled by which of the following controls?

Swinging loads can be controlled by which of the following controls?

• A. Bridge or trolley controls
• B. Bridge or hoist controls
• C. Trolley or hoist controls
• D. Limit switch and hoist controls

Answer: (A)

Swinging loads are managed by dampening the horizontal motion of the load. The way to do this is by using the crane’s horizontal controls—the bridge or the trolley—to move the load back toward the center or toward the desired position. Moving the hoist handles only changes how high or low the load is; that vertical motion doesn’t eliminate side-to-side swing and can even let the load oscillate more if used improperly. Safety devices like limit switches are for stopping travel at preset points and don’t actively damp swing. So, the best way to control swinging loads is with the bridge or trolley controls.

Swinging loads are managed by dampening the horizontal motion of the load. The way to do this is by using the crane’s horizontal controls—the bridge or the trolley—to move the load back toward the center or toward the desired position. Moving the hoist handles only changes how high or low the load is; that vertical motion doesn’t eliminate side-to-side swing and can even let the load oscillate more if used improperly. Safety devices like limit switches are for stopping travel at preset points and don’t actively damp swing. So, the best way to control swinging loads is with the bridge or trolley controls.