Which two methods can be utilized to protect workers in a trench instead of shoring?

The sliding trench shield and portable hydraulic shoring are methods specifically designed to provide safety and protection for workers in trenching operations. A sliding trench shield is a robust structure that can be placed within the trench to prevent soil collapse while allowing workers to operate safely in the trench. It can be easily adjusted and moved as the work progresses. Portable hydraulic shoring uses hydraulic systems to support the trench walls, allowing for flexible and effective stabilization of the trench environment.

Both of these methods are practical alternatives to traditional shoring techniques, offering efficient support and enhancing worker safety by minimizing the risk of cave-ins. This focus on engineered solutions reflects best practices in trench safety management.

In contrast, the other options do not provide the same level of worker protection against trench collapse. Wooden boards and metal braces may not adequately support the walls and could fail under pressure. Concrete barriers and safety nets are not typically employed in trenches because they do not address soil movement directly. Temporary walls and earth mounds might help, but they often don’t meet the rigorous safety standards required for deep trenching operations. Thus, the selected answer emphasizes commonly accepted and effective methods for ensuring safety in such situations.