Site Operations & Hazard Recognition Flashcards

Why survey the job site before crane use?

Answer: Check ground and hazards

Surveying the job site before crane use is a fundamental safety practice. This involves assessing the ground conditions to ensure it can support the crane's weight and outrigger pressures, as well as identifying potential hazards like power lines, underground utilities, and obstructions. A thorough site survey helps prevent accidents, structural failures, and ensures a safe operating environment.

What is a common site hazard?

Answer: Power lines

Power lines are one of the most common and dangerous hazards on a construction site, especially for crane operations. Contact with energized power lines can result in electrocution, severe burns, or even death for the operator and ground personnel. Strict clearance distances must be maintained, and power lines should be de-energized or shielded whenever possible.

Why maintain clear communication?

Answer: Prevent accidents

Clear and consistent communication between the crane operator, signal person, and other ground personnel is paramount for safe crane operations. Misunderstandings or lack of communication can lead to incorrect movements, collisions, or dropped loads, all of which can cause serious accidents. Using standardized hand signals, radios, or other approved methods ensures everyone is aware of the lift plan and current actions.

What can unstable soil cause?

Answer: Crane collapse

Unstable soil conditions, such as soft ground, inadequate compaction, or hidden voids, can severely compromise a crane's stability. If the ground beneath the crane's outriggers or tracks gives way, the crane can lose its level position, become unbalanced, and ultimately collapse. Proper ground preparation and the use of adequate matting or cribbing are essential to distribute the crane's weight safely.

How to protect swing radius?

Answer: Use barricades

The swing radius is the area around the rotating superstructure of a crane where the counterweight or other parts of the crane can move. To protect personnel and prevent collisions, this area must be clearly defined and restricted using physical barriers like barricades. This ensures that no unauthorized personnel or equipment enter the danger zone during crane operation.

What to check during weather changes?

Answer: Wind speed

Wind speed is a critical factor to monitor during crane operations, as strong winds can significantly affect the stability of the crane and the control of the suspended load. High winds can cause the load to swing uncontrollably, increase stress on the boom, and potentially lead to tipping or structural failure. Crane operations must cease if wind speeds exceed the manufacturer's specified limits.

Who should brief crew on hazards?

Answer: Supervisor

The supervisor, or a designated competent person, is responsible for conducting a thorough hazard assessment and briefing the entire crew on identified risks before work begins. This ensures that everyone involved in the crane operation is aware of potential dangers, understands safety protocols, and knows how to respond in an emergency. Effective communication of hazards is crucial for preventing accidents.

Why clear overhead obstructions?

Answer: Prevent collision

Overhead obstructions, such as power lines, existing structures, trees, or other equipment, pose a significant collision risk during crane operations. Before any lift, the area must be thoroughly inspected to identify and, if possible, remove or clearly mark all overhead obstructions. Maintaining adequate clearance is essential to prevent the boom or load from striking anything, which could lead to structural damage, dropped loads, or electrocution.

When should hazard assessment occur?

Answer: Before and during work

Hazard assessment is not a one-time event; it's an ongoing process. A thorough assessment must be conducted before work begins to identify initial risks and develop a safety plan. Additionally, continuous monitoring and reassessment are necessary during work to account for changing conditions, new tasks, or unforeseen circumstances. This proactive approach ensures safety throughout the entire project.