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Comparison of biomechanical loading during use of conventional stud welding equipment and an alternate system.

Authors
Fethke-NB; Gant-LC; Gerr-F
Source
Appl Ergon 2011 Jul; 42(5):725-734
NIOSHTIC No.
20039487
Abstract
We investigated the effect of an alternative welding system designed to reduce exposure to extreme trunk flexion on measures of trunk inclination and muscle activity. Among 10 participants, data were collected while using conventional stud welding equipment and while using the alternate system. Paired t-tests were used to compare results between the two welding systems. Mean trunk inclination angle was reduced with the alternate system (34.4 degree versus 9.7 degree, p less than 0.01). Percent time with trunk inclination angles greater than 60 degree was also reduced (40.0 percent versus 4.7 percent, p less than 0.01). In general, the alternate system resulted in less desirable upper trapezius muscle activity levels. The alternate system appears to be effective in reducing exposure to extreme trunk flexion among stud welders. Continued development of the system should explore features designed to reduce shoulder forces and improve productivity.
Keywords
Ergonomics; Biomechanics; Musculoskeletal-system; Equipment-design; Welders; Welding; Welding-equipment; Construction-equipment; Men; Posture; Spinal-cord; Epidemiology; Engineering-controls; Human-factors-engineering; Muscle-function; Muscle-physiology; Body-mechanics; Body-regions; Measurement-equipment; Biomechanical-engineering; Author Keywords: Construction; Ergonomics; Trunk posture
Contact
Nathan Fethke, University of Iowa, Occupational and Environmental Health, UI Research Park, Iowa City, IA 52242, USA
CODEN
AERGBW
Publication Date
20110701
Document Type
Journal Article
Email Address
nathan-fethke@uiowa.edu
Funding Type
Construction; Cooperative Agreement
Fiscal Year
2011
NTIS Accession No.
NTIS Price
Identifying No.
Cooperative-Agreement-Number-U60-OH-009762
Issue of Publication
5
ISSN
0003-6870
Priority Area
Construction
Source Name
Applied Ergonomics
State
IA; MD
Performing Organization
CPWR - The Center for Construction Research and Training, Silver Spring, Maryland
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