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Biomechanical assessment of three rebar tying techniques.

Authors
Albers-JT; Hudock-SD
Source
Int J Occup Saf Ergon 2007 Sep; 13(3):279-289
NIOSHTIC No.
20032605
Abstract
The National Institute for Occupational Safety and Health (NIOSH) conducted a study of ironworkers to evaluate their risk for developing back and hand injuries from hand-tying reinforcing steel bar and to investigate whether power tying tools can be an effective intervention for the prevention of work-related musculoskeletal disorders. A field investigation of biomechanical loading when using 3 techniques to tie together rebar was conducted. Researchers measured employees' wrist and forearm movement with goniometers and videotaped and analyzed trunk postures. Manually tying rebar at ground level involved sustained deep trunk bending and rapid, repetitive, and forceful hand-wrist and forearm movements. Using a power tier significantly reduced the hand-wrist and forearm movements and allowed the ironworkers to use one free hand to support their trunk posture while tying. Adding an extension handle to the power tier allowed the ironworkers to tie rebar while standing erect, minimizing sustained trunk flexion.
Keywords
Work-environment; Musculoskeletal-system-disorders; Biomechanical-modeling; Biomechanics; Repetitive-work; Ergonomics; Construction; Construction-industry; Construction-workers; Iron-working-industry
Contact
James T. Albers, NIOSH, MS C-24, 4676 Columbia Parkway, Cincinnati, OH 45226
CODEN
IJOEF2
Publication Date
20070901
Document Type
Journal Article
Email Address
JAlbers@cdc.gov
Fiscal Year
2007
NTIS Accession No.
NTIS Price
Issue of Publication
3
ISSN
1080-3548
NIOSH Division
DART
Source Name
International Journal of Occupational Safety and Ergonomics
State
OH
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