Redesign of the Handle of Painting Tool of Construction Painters

This study explores the design of a handle for painting tools aimed at improving ergonomics and reducing physical strain on painters during wall painting tasks. Traditional straight handles often create an acute angle with the painter's wrist, leading to discomfort and excessive force application. In contrast, a bent handle aligns more naturally with the painter's forearm, thereby reducing wrist strain and improving overall comfort. The study finds that a bent handle creates a more favorable angle for applying force on the wall, making the painting process less physically demanding. Additionally, the bent design allows painters to work from a closer distance to the wall, particularly in confined spaces such as balconies of high-rise buildings. This design also enables painters to adjust handle length according to the height of the wall being painted, improving reach and efficiency. A survey of Indian painters indicated an average usable handle length of 4 feet 9 inches for optimal performance. The study further considers the dimensions and grip design to ensure the handle is ergonomic, with a diameter of 30 mm to 36 mm, consistent with industry standards for handheld tools. Overall, the bent handle design offers significant functional benefits, enhancing both comfort and efficiency for painters.