The Influence of Slope Angle of Stairs on Energy Consumption and Work Productivity on Male and Female Workers

摘要

Material handling can be done with the help of equipment or manually with various methods or working positions. One of the real work which we seen everyday is material handling from warehouse to truck with using stairs, where we don't know how to use slope angle by right so that it can result high productivity. The objective of the research is to know whether there are a difference of influence between the 30° and 45° used to carry goods from the first floor to the second floor on work productivity in male and female workers. It is assumed that the results of the study will show that workers carrying goods using 30°, produces to higher productivity than using 45° for both male and female workers. Male worker has a stronger endurance so it will have higher productivity than female worker. This research can contribute to theoretical understanding in the development of ergonomics and the design of work system, especially on material handling by using different slope angle of stairs on both male and female workers. Variables include the independent variables are: (1) The slope angle of stairs with two levels are 45° and 30°, (2) Sex with two levels are male and female. And the dependent variable is work productivity of the amount of goods that can be brought (kg) per unit time. Data analysis with inferential statistical approach Analysis of Variance (ANOVA) with 95% significance level by using minitab software. The results show significantly that material handing using stairs with the stairs angle with the slope of 30° generate higher productivity compared to when using stairs angle with slope of 45° on workers at both male and female. In working time for 15 minutes male workers can move thing larger than female, namely male workers as much as 303.6 kg/15 minutes and female workers as much as 249.6 kg/15 minutes. While stairs with slope 30° more ease the workload than stairs of the slope of 45°, namely giving results 322.8 kg/15 minutes for slope 30°, and 230,5 Kg/15 minutes for slope of 45°.