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Maximum weights of asymmetrical loads acceptable to industrial workers for symmetrical manual lifting.

Authors
Mital-A
Source
Am Ind Hyg Assoc J 1987 Jun; 48(6):539-544
NIOSHTIC No.
00171444
Abstract
Databases of the maximum acceptable weight of asymmetrical loads for male and female industrial workers were developed. Maximum acceptable weights of lift were determined psychophysiologically for 37 male and 37 female experienced industrial workers, and 37 male and 37 female students, by allowing each subject to adjust weight in a box to arrive at the maximum acceptable weight of lift. Maximum acceptable weight of lift data were then adjusted for the effect of work shift duration. On the average, the maximum acceptable weight of lift for male students was 89 percent of the maximum acceptable weight of lift for male industrial workers, while the maximum weight of lift acceptable for female students was 94 percent of that of acceptable for female industrial workers. Changes in maximum acceptable weight of lift were determined in response to changes in three different task variables: lifting heights, lifting frequency, and box size. The patterns of decline in maximum acceptable weight with lifting height and box size were similar between industrial workers and students of the same gender. However, the response to changes in lifting frequency was similar between male and female students, and between male and female industrial workers. In a separate study, the maximum acceptable weight of lift of asymmetrical loads was determined psychophysiologically for ten male college students. These data were adjusted to generate design databases of maximum acceptable weight of lift for asymmetrical loads for male and female industrial workers. The authors recommend that the databases developed be used in designing manual lifting jobs involving asymmetrical loads in order to reduce spinal stresses and the risk of overexertion injuries.
Keywords
NIOSH-Publication; NIOSH-Grant; Physical-stress; Industrial-factory-workers; Ergonomics; Fatigue; Psychophysiology; Work-capacity; Back-injuries; Humans
Contact
Mechanical and Industrial Engr University of Cincinnati Dept of Mec & Indus Engrg Cincinnati, OH 45221
CODEN
AIHAAP
Publication Date
19870601
Document Type
Journal Article
Funding Amount
445583
Funding Type
Grant
Fiscal Year
1987
NTIS Accession No.
NTIS Price
Identifying No.
Grant-Number-R01-OH-01956
Issue of Publication
6
ISSN
0002-8894
Source Name
American Industrial Hygiene Association Journal
State
OH
Performing Organization
University of Cincinnati, Cincinnati, Ohio
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