OSHA 10-Hour Construction ReviewFocus Four HazardsMedium
During demolition work, a crane is used to hoist a large, heavy concrete slab. As the slab is being lifted, it begins to swing unpredictably due to wind. What is the immediate priority for the crane operator?
- AIncrease the hoisting speed to gain control.
- BAttempt to quickly lower the slab to the ground.
- CStop the lift and secure the load to prevent further swinging.
- DContinue the lift, relying on the load's weight to stabilize it.
Show answer & explanationAnswer & explanation
Correct answer: C. Stop the lift and secure the load to prevent further swinging.
When a load becomes unstable and swings unpredictably, the immediate priority is to stop the lift and stabilize the load. Trying to lower it quickly or increasing speed can worsen the situation, increasing the risk of a 'struck-by' incident or structural failure.
Why the other options are wrong
- A. Increasing speed will likely exacerbate the swinging and loss of control.
- B. Quickly lowering an unstable load can make it swing more violently or cause it to strike something.
- D. Continuing the lift with an unstable load is extremely dangerous and increases the risk of 'struck-by' injuries or equipment damage.
Crane Load Control
If a crane load becomes unstable or swings, stop the lift and stabilize the load immediately.
- Uncontrolled loads pose severe 'struck-by' hazards.
- Wind and improper rigging are common causes of instability.
- Operator must be trained in emergency procedures.
Memory trick: When the load's on a spree, stop and secure, you'll agree.