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Workman electrocuted when crane load line contacts 7200 volt power line.
Morgantown, WV: U.S. Department of Health and Human Services, Public Health Service, Centers for Disease Control, National Institute for Occupational Safety and Health, FACE 85-08, 1985 Jan; :1-5
A case study of a worker electrocuted when a crane load line contacted a power line was examined. The victim's employer had contracted with a crane rental company to provide a truck mounted crane and operator at the work site to assist in erecting the roof. The victim's supervisor also warned the two workers about some of the materials placed under the 7,200 Volt power lines and suggested dragging the materials with the crane instead of lifting them straight off the ground. The two workers moved four bundles of roofing joists from their temporary storage area to an area closer to the building, which was directly beneath the power line. As the victim was in the process of hooking the load to the crane, the load line contacted the power line when the boom moved; the electricity flowed through the victim's body to ground. The victim was administered cardiopulmonary resuscitation and was pronounced dead soon after arrival to a nearby hospital. The following factors contributed to the electrocution: storage of construction materials beneath overhead power lines, use of crane load lines within a 10 foot distance of overhead power lines, risks taken by the crane operator and the victim, and a wet working surface from thawed sleet. The crane operator did not observe the overhead power lines, and the crane's controls were on a pivoted arm that allowed operation from either side of the truck. The authors recommend that stored materials should be kept in areas where they do not create additional job hazards. Cranes should not be used within a distance of 10 feet from overhead power lines without first having the lines deenergized and insulated with protective coverings, or using an approved insulated lifting device on the load line.
NIOSH-Author; Electrical-industry; Engineering; Accident-potential; Industrial-environment; Safety-engineering; Region-4; Workplace-studies; Safety-measures; Accident-prevention; Industrial-equipment; FACE-85-08; Construction-Search
Field Studies; Fatality Assessment and Control Evaluation
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National Institute for Occupational Safety and Health
Page last reviewed: September 2, 2020
Content source: National Institute for Occupational Safety and Health Education and Information Division