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A comparison of different postures for scaffold end-frame disassembly.
Cutlip R; Hsiao H; Garcia R; Becker E; Mayeux B
Appl Ergon 2000 Oct; 31(5):507-513
Overexertion and fall injuries comprise the largest category of nonfatal injuries among scaffold workers. This study was conducted to identify the most favourable scaffold end-frame disassembly techniques and evaluate the associated slip potential by measuring whole-body isometric strength capability and required coefficient of friction (RCOF) to reduce the incidence of injury. Forty-six male construction workers were used to study seven typical postures associated with scaffold end-frame disassembly. An analysis of variance (ANOVA) showed that the isometric forces (334.4-676.3 N) resulting from the seven postures were significantly different (p<0.05). Three of the disassembly postures resulted in considerable biomechanical stress to workers. The symmetric front-lift method with hand locations at knuckle height would be the most favourable posture; at least 93% of the male construction worker population could handle the end frame with minimum overexertion risk. The static RCOF value resulting from this posture during the disassembly phase was less than 0.2, thus the likelihood of a slip should be low.
Scaffolds; Injuries; Workers; Injury prevention; Construction workers; Construction industry; Biomechanics; Biomechanical modeling; Risk analysis; Risk factors; Occupational accidents; Ergonomics; Musculoskeletal system disorders; Musculoskeletal system; Men; Posture; Biomechanical engineering; Construction; Height factors; Work analysis; Work operations; Worker health; Author Keywords: Isometric strength; Sca!old; Shear forces; Required coefficient of friction
R Cutlip, National Institute for Occupational Safety and Health, Division of Safety Research, 1095 Willowdale Road, M/S 2027, Morgantown, WV 26505, USA
Issue of Publication
Research Tools and Approaches: Exposure Assessment Methods
West Virginia University, Morgantown, West Virginia
Page last reviewed: June 15, 2021
Content source: National Institute for Occupational Safety and Health Education and Information Division