Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10365922 | Applied Ergonomics | 2005 | 8 Pages |
Abstract
The objective of the present study was to compare energetic workload, perceived exertion, perceived discomfort, safety, and mechanical load at lower limb joints among window cleaners during usage of extension ladders with 30 and 35Â cm rung separation. Eleven healthy male professional window cleaners of short and tall stature participated in this study. No significant differences between 30 and 35Â cm rung separation were observed for the energetic workload. Results concerning the perceived exertion, discomfort, and safety indicate that 35Â cm rung separation is preferred. Based on the mechanical load at the hip, knee, and ankle during ascending and descending the ladder, 30Â cm rung separation is preferable to 35Â cm rung separation. It is advised to climb ladders with the knees inside the side rails of the ladder, but this seems only possible with 35Â cm rung separation. Findings of the presents study suggest that overall, a 35Â cm rung separation is marginally favourable while using extension ladders.
Keywords
Related Topics
Physical Sciences and Engineering
Computer Science
Human-Computer Interaction
Authors
Marco J.M. Hoozemans, Michiel P. de Looze, Idsart Kingma, Karen C.N. Reijneveld, Elsbeth M. de Korte, Maarten P. van der Grinten, Jaap H. van Dieën,