What is the minimum size for a safe helicopter landing zone (LZ)?

The minimum size for a safe helicopter landing zone (LZ) is 100 feet by 100 feet. This size provides a safe area for the helicopter to land and take off without the risk of colliding with obstacles such as trees, power lines, or uneven ground. Additionally, the 100-foot size ensures adequate space for the rotor wash, which can create swirling winds around the landing site and may impact the safety of personnel and equipment nearby. Helicopters can have a wingspan and rotor span that require sufficient clearance to operate safely, and this dimension allows for that, providing a margin for any unexpected maneuvers during the landing and takeoff phases. A zone of this size can accommodate a variety of helicopter types, ensuring that appropriate safety standards are met in outdoor emergency situations.