TY - JOUR
T1 - Effect of rigid container shape on maximum acceptable weight of lift
AU - Ostrom, Lee T.
AU - Smith, James L.
AU - Ayoub, M. M.
N1 - Funding Information:
This work was supported in part by the Agenzia Spaziale Italiana (ASI) and by EC contract EV5V-CT94-0502 within the framework of a northern hemisphere climate processes land-
PY - 1990
Y1 - 1990
N2 - In the chemical, pharmaceutical, and paint manufacturing industries raw and finished materials are frequently shipped in cylindrical rigid containers instead of boxes. Psychophysical manual materials handling lifting capacity studies to date have not considered whether rigid container shape has an effect on maximum acceptable weight of lift. Two psychophysical studies were designed and conducted in order to answer this question. During the first experiment ten subjects lifted boxes with three different heights, at three different frequencies, and through three different lift ranges in order to establish a data base in which to compare the results of the second experiment. During the second experiment the same group of subjects lifted cylinders with three different heights at the same frequencies of lift and through the same lift ranges as the first experiment. The subjects adjusted the weight of the box until they felt they could safely lift that weight for eight hours. This weight was the maximum acceptable weight of lift (MAWL). The experimental design for both experiments was a 3 factor randomized complete block design with blocking on subjects. The dependent variables were oxygen consumption (VO2), MAWL, and Borg's rating of perceived exertion. The results indicated that when one designs a lifting task for a rigid container the shape of the rigid container, whether a cylinder or a box, does not need to be taken into account and that current psychophysical lifting capacity prediction models can be used to design cylinder lifting tasks.
AB - In the chemical, pharmaceutical, and paint manufacturing industries raw and finished materials are frequently shipped in cylindrical rigid containers instead of boxes. Psychophysical manual materials handling lifting capacity studies to date have not considered whether rigid container shape has an effect on maximum acceptable weight of lift. Two psychophysical studies were designed and conducted in order to answer this question. During the first experiment ten subjects lifted boxes with three different heights, at three different frequencies, and through three different lift ranges in order to establish a data base in which to compare the results of the second experiment. During the second experiment the same group of subjects lifted cylinders with three different heights at the same frequencies of lift and through the same lift ranges as the first experiment. The subjects adjusted the weight of the box until they felt they could safely lift that weight for eight hours. This weight was the maximum acceptable weight of lift (MAWL). The experimental design for both experiments was a 3 factor randomized complete block design with blocking on subjects. The dependent variables were oxygen consumption (VO2), MAWL, and Borg's rating of perceived exertion. The results indicated that when one designs a lifting task for a rigid container the shape of the rigid container, whether a cylinder or a box, does not need to be taken into account and that current psychophysical lifting capacity prediction models can be used to design cylinder lifting tasks.
UR - http://www.scopus.com/inward/record.url?scp=0025562313&partnerID=8YFLogxK
U2 - 10.1177/154193129003401022
DO - 10.1177/154193129003401022
M3 - Conference article
AN - SCOPUS:0025562313
SN - 0163-5182
SP - 767
EP - 770
JO - Proceedings of the Human Factors Society
JF - Proceedings of the Human Factors Society
T2 - Proceedings of the Human Factors Society 34th Annual Meeting - Orlando '90
Y2 - 8 October 1990 through 12 October 1990
ER -