Scaffolds must be properly braced with which types of braces?

The correct answer indicates that scaffolds must be properly braced with cross and diagonal braces to ensure stability and prevent collapse. Cross braces provide rigidity to the structure, distributing weight and forces evenly. This configuration effectively counteracts lateral movements and enhances the overall strength of the scaffold.

Diagonal braces are also vital as they provide additional support and enhance the structural integrity against forces that could cause sway or tipping. Proper bracing is a critical aspect of scaffold safety, helping to maintain a safe working environment for workers.

In contrast, while options may mention other types of braces such as vertical or horizontal, these do not specifically address the combination that maximizes stability and resistance to forces commonly encountered in scaffold use. Understanding the importance of these specific types of braces is essential for anyone working with scaffolding to ensure the safety of both workers and equipment during construction and maintenance activities.