A general lifting equation based on total mechanical work
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University of Cincinnati / OhioLINK
2004
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ndltd-OhioLink-oai-etd.ohiolink.edu-ucin10857595362021-08-03T06:09:46Z A general lifting equation based on total mechanical work SONBOL, AMR M. general lifting equation recommended weight limit manual lifting total mechanical work energy expenditure Objective: The objective of this thesis is to develop a total mechanical lifting equation based on the laws of physics, from which a Recommended Weight Limit and Load Index may be developed.Background: The NIOSH equation is an empirical equation that is based on expert opinions from the biomechanical, physiological, and psychophysical fields. Applying the NIOSH lifting equation can take place under ideal or non-ideal conditions. Under the ideal conditions the load to be lifted is 51 lbs, whereas the non-ideal conditions will cause stresses on the body resulting in reduction of the load lifted. Both ideal and non-ideal conditions are governed by, H (distance from the spine), A (rotation about the spine), V (original height of lift), and D (vertical lifting distance). Methods: Based on the ideal and non-ideal conditions set by the NIOSH; the laws of physics are used to derive mechanical equations under ideal and non-ideal conditions. The equations derived accounted for the changes in H, D, A and V. These changes would cause moments that produce stress on the body, specifically the spine. This stress was denoted by stress coefficients that are calculated using the NIOSH coefficients. Results: The results showed that, by applying the new general lifting equation sensitivity can be observed primarily to both the changes in D and H. Whereas the NIOSH equation showed sensitivity to mainly the H, and showed minimal sensitivity to D. Changes in A and V in both equations showed a lesser effect. Conclusions: The primary finding suggests an improvement in the General Lifting Equation versus the NIOSH equation because it accounts for more factors than the NIOSH equation. It also gives credit to the NIOSH for developing an empirical model that predicts the lifting load limits that is similar in manner to the new General Lifting Equation. 2004-07-07 English text University of Cincinnati / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=ucin1085759536 http://rave.ohiolink.edu/etdc/view?acc_num=ucin1085759536 unrestricted This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws. |
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NDLTD |
| language |
English |
| sources |
NDLTD |
| topic |
general lifting equation recommended weight limit manual lifting total mechanical work energy expenditure |
| spellingShingle |
general lifting equation recommended weight limit manual lifting total mechanical work energy expenditure SONBOL, AMR M. A general lifting equation based on total mechanical work |
| author |
SONBOL, AMR M. |
| author_facet |
SONBOL, AMR M. |
| author_sort |
SONBOL, AMR M. |
| title |
A general lifting equation based on total mechanical work |
| title_short |
A general lifting equation based on total mechanical work |
| title_full |
A general lifting equation based on total mechanical work |
| title_fullStr |
A general lifting equation based on total mechanical work |
| title_full_unstemmed |
A general lifting equation based on total mechanical work |
| title_sort |
general lifting equation based on total mechanical work |
| publisher |
University of Cincinnati / OhioLINK |
| publishDate |
2004 |
| url |
http://rave.ohiolink.edu/etdc/view?acc_num=ucin1085759536 |
| work_keys_str_mv |
AT sonbolamrm ageneralliftingequationbasedontotalmechanicalwork AT sonbolamrm generalliftingequationbasedontotalmechanicalwork |
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1719431940885446656 |