According to CFR regulations, is it true that fasteners should not be driven into very hard or brittle material?

The statement is indeed accurate, as certain regulations within the Code of Federal Regulations (CFR) address the use of fasteners in construction and general safety practices. Fasteners should not be driven into very hard or brittle materials because doing so can lead to several hazards.

When fasteners, such as nails or screws, are used on materials that do not allow for proper penetration or that may crack or break, it can compromise both the integrity of the fastener and the material itself. If a fastener is forced into a hard or brittle surface, there is a significant risk of the fastener failing to secure properly, which ultimately affects the stability of the structure. Additionally, the brittle material may shatter, posing a risk of injury from flying debris.

In most safety regulations, determining the appropriate fastener type and installation methods is critical to maintaining safe working conditions. If the material is unsuitable for driving fasteners, alternative methods or materials are usually recommended to ensure safety and structural integrity.