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Delivery truck driver electrocuted after truck-mounted boom contacts 40,000-volt overhead power line.

NIOSH 1994 Apr; :1-3
A 23-year-old male part-time delivery truck driver (victim) was electrocuted when he stepped from the cab of a flatbed truck after its partially extended loading boom contacted a 40,000-volt overhead power line. The incident occurred while the victim and a coworker were picking up excess building materials from two locations on a construction site. While the victim drove the truck between locations, the loading boom was not fully lowered and secured. The two section boom was in a partially extended, inverted-V position with the loading fork resting on the building materials on the truck flatbed. Its elbow or hinge point was approximately 30 feet above ground while the truck was being moved between locations. As the victim drove the truck to the second location, the extended boom contacted the overhead power line. Hearing a loud bang, he stopped the truck and exited the cab to determine what had happened. He was electrocuted when he touched the ground while also contacting the metal frame of a cab-mounted ladder used to climb to the boom operating platform. MN FACE investigators concluded that, in order to reduce the likelihood of similar occurrences, the following guidelines should be followed: 1. employers should ensure that booms are fully lowered and secured before boomed vehicles are moved; 2. employers should ensure that adequate clearance between loading booms and overhead power lines is maintained; 3. employers should ensure that boomed vehicle drivers/operators are trained in their safe operation; and 4. boomed vehicle manufacturers should design interlock systems that prevent vehicles from being moved unless the boom is fully lowered and secured.
Region-5; Accident-analysis; Accident-prevention; Accidents; Injuries; Injury-prevention; Traumatic-injuries; Work-operations; Work-analysis; Work-areas; Work-performance; Work-practices; Safety-education; Safety-equipment; Safety-measures; Safety-monitoring; Protective-measures; Construction-workers; Personal-protection; Electric-properties; Electrical-conductivity; Electrical-hazards; Electrical-safety; Electricity; Electrocutions; Truck-drivers; Equipment-design; Equipment-operators; Drivers
Publication Date
Document Type
Field Studies; Fatality Assessment and Control Evaluation
Funding Type
Cooperative Agreement
Fiscal Year
NTIS Accession No.
NTIS Price
Identifying No.
FACE-94MN012; Cooperative-Agreement-Number-U60-CCU-507283
SIC Code
Source Name
National Institute for Occupational Safety and Health
Performing Organization
Minnesota Department of Health