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Fatality Assessment and Control Evaluation (FACE) Report for New York: Crane Boom Collapse Kills Man during Disassembling

机译:纽约致死率评估和控制评估(FaCE)报告:在吊装过程中,吊臂坍塌导致人员死亡

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In March 2008, an adult male (the victim) sustained fatal injuries when the crane boom he was disassembling buckled and crushed him. The truck-mounted lattice boom crane belonged to the owner of a construction company (the owner), who was a friend of the victim. The victim was not an employee of the construction company. At the time of the incident, the victim was at the owner's yard assisting him in disassembling the boom. The boom was 55 feet long and composed of four sections: a base (15 feet), boom extension I (20 feet), boom extension II (10 feet) and a tip with the hook (10 feet). Adjacent sections were connected with eight bolts and four connecting pins. With the pendants (hoist cables) attached to the upper end or tip of the boom, the owner and the victim lowered the boom until the tip was approximately 4 12 feet above the ground. According to the owner, no connecting pins were to be removed until the pendants were moved from the tip to extension II and the tip section was cantilevered. The victim started removing the bolts while the owner was disassembling the hook block assembly near the tip end. In addition to removing the bolts, the victim also removed four lower connecting pins while positioning himself under the boom: two between the tip and extension II and two between extensions I and II. As the victim drove the last pin out with a 12-pound sledgehammer, the boom buckled and fell on him. The owner called 911 to summon paramedics who arrived within minutes. The victim was transported to a hospital where he was pronounced dead. New York State Fatality Assessment and Control Evaluation (NY FACE) investigators concluded that to help prevent similar incidents from occurring in the future, employers should: (1) ensure that all personnel assigned to assemble/disassemble or assist in assembling/disassembling a crane boom receive training on safe assembly/disassembly procedures; (2) ensure that all personnel who are assigned to assemble/disassemble crane booms strictly follow the manufacturer's assembly/disassembly procedures and use blocking to support all boom sections; (3) consult the manufacturer for updated operating and maintenance procedures and safe work practices when using older crane models; and (4) instruct workers to insert the connecting pins with the cotter pins placed on the outside of the boom during crane assembly so that no worker has to get under the boom to remove the cotter pins during disassembly.

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