This study evaluated the effects of the handle width(shoulder width, 1.25${ imes}$shoulder width, 1.5${ imes}$shoulder width), height(3 levels : knee, medium, knuckle) and horizontal angle($0^{circ}$, $10^{circ}$) on the pushing, lifting, and twisting strengths which were required for carrying single or two wheel barrows. Twelve healthy college students(male) participated in the experiment. In each experimental condition($3{ imes}3{ imes}2$=18), the subjects exerted three forces(pushing, lifting, and twisting clockwise). The experimental conditions and three forces were tested in random order, and a minimum 2 minutes of rest was provided between exertions. Results showed that the mean and maximum pushing forces showed greater values when the horizontal angle was $0^{circ}$ than $10^{circ}$(p=0.016). However, the three independent variables had no statistically significant effects on the lifting forces(p>0.1). The mean and maximum twisting forces increased as the handle width became larger(p<0.05). Also, there was a marginal effect of the horizontal angle(p=0.065) on the twisting force. From the results of this study, the horizontal angle of $0^{circ}$ and the wider handle width were suggested for the design of single-wheel barrows.