How is the stability of a scaffold ensured?

The stability of a scaffold is primarily ensured through the use of structural components such as base plates, outriggers, and by tying the scaffold to the building structure. Base plates distribute the load evenly over the ground, preventing shifting or sinking. Outriggers extend the base of the scaffold, providing additional support and stability, especially on uneven or soft ground. Tying the scaffold to the building structure offers lateral support, helping to prevent swaying or falling under weight or wind pressure.

While some of the other options may contribute to safety in broader terms, they do not directly address the structural integrity necessary for the stability of scaffolding. For instance, using colorful banners or ensuring tools are removed may enhance visibility or reduce clutter but does not contribute to the physical support required for stability. Limiting the number of workers might improve safety but again does not fix any inherent issues of structural stability that need to be managed through proper engineering and setup techniques.