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A comparison of different postures for scaffold end-frame disassembly.

Authors
Cutlip R; Hsiao H; Garcia R; Becker E; Mayeux B
Source
Appl Ergon 2000 Oct; 31(5):507-513
NIOSHTIC No.
20020648
Abstract
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.
Keywords
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
Contact
R Cutlip, National Institute for Occupational Safety and Health, Division of Safety Research, 1095 Willowdale Road, M/S 2027, Morgantown, WV 26505, USA
CODEN
AERGBW
Publication Date
20001002
Document Type
Journal Article
Email Address
rgc8@cdc.gov
Fiscal Year
2001
Issue of Publication
5
ISSN
0003-6870
NIOSH Division
HELD
Source Name
Applied Ergonomics
State
WV
Page last reviewed: April 12, 2019
Content source: National Institute for Occupational Safety and Health Education and Information Division