Under what condition is it acceptable to remain on a rolling scaffold while it is being moved?

Remaining on a rolling scaffold while it is being moved is acceptable under specific conditions that ensure safety and stability. The correct condition is when the platform height is less than two times the small base dimension. This guideline is based on maintaining a safe ratio between the height of the scaffold and its base dimensions, which helps prevent tipping and ensures that the scaffold remains stable during movement.

A height-to-base dimension ratio of less than two indicates that the scaffold is not excessively tall relative to its base, which minimizes the risk of it becoming unbalanced when in motion. This safety practice is crucial because scaffolds can easily tip over if they're too tall for their base width, particularly if there are any disturbances during movement or if individuals are on the scaffold.

Other conditions, such as securing the base or having multiple operators, are important for safety but do not specifically govern whether it is safe to remain on the scaffold while it is being moved. Thus, knowing and applying the height and base dimension ratio is key to ensuring safe practices in scaffold use.