What is indicated by providing a scaling bar when manual scaling is performed?

Providing a scaling bar during manual scaling is essential for safety. Scaling bars help ensure that workers maintain a safe distance from potential hazards, such as loose rock or unstable surfaces, which can pose risks while performing maintenance or excavation tasks. By using a scaling bar, operators can effectively gauge the dimensions of the area they are working in and apply the appropriate amount of force safely. This practice is critical in underground mining or construction environments where the risk of falling debris is significant. Using a scaling bar not only enhances workers' safety but also promotes more effective and accurate scaling, contributing to the overall stability of the work environment.