What is a common requirement for scaffolding safety according to OSHA?

The requirement that planks should overlap sufficiently is crucial for ensuring the safety and stability of scaffolding systems. Overlapping planks create a stronger and more secure platform that reduces gaps, which can minimize the risk of workers losing their footing or dropping tools and materials during elevated tasks. Proper overlap helps to distribute weight more evenly across the scaffolding structure and provides a continuous walking surface, thereby enhancing overall safety.

In contrast, the other options do not align with the specific requirements set forth by OSHA for scaffolding safety. Planks being painted bright colors may improve visibility but does not directly contribute to structural integrity or safety during use. A requirement for scaffolds to be immovable is impractical, as scaffolds must be designed for some level of mobility and adjustment according to construction site needs. Similarly, high visibility markings serve a purpose in safety signaling but are ancillary rather than fundamental to the structural safety and functionality of the scaffold itself. Thus, sufficient overlap of the planks is essential for maintaining safety standards on job sites.