A construction worker in his 60s is in a coma after a crane overturned and dropped a heavy iron plate on him Friday morning [1, 2].

The incident highlights the critical risks of heavy machinery instability and the potential for catastrophic injury when load balances fail at industrial sites.

The accident occurred just after 8 a.m. [1] at a construction site in the Kusaki area of Omuta City, located in Fukuoka Prefecture [1, 2]. According to reports, the crane was in the process of lifting a load weighing approximately 17 tons [1].

Investigators said the crane lost its balance during the operation, causing the vehicle to tip over [1]. As the machinery overturned, an iron plate weighing approximately 300 kg slipped and fell [1, 2].

The falling plate crushed a nearby male worker in his 60s [2]. Emergency responders transported the man to a hospital, where he remains in a coma [1, 2].

Authorities are examining the site to determine the exact cause of the instability. The investigation focuses on whether the 17-ton load exceeded the crane's operational capacity, or if ground instability contributed to the tip [1].

“An iron plate weighing approximately 300 kg slipped and fell”

This accident underscores the volatility of high-tonnage lifting operations. When a crane loses balance while managing a 17-ton load, the resulting kinetic energy can cause secondary projectiles—such as the 300 kg plate in this case—to become lethal hazards for anyone within the immediate perimeter, regardless of their specific role in the lift.