What is the term for a framework of wood or metal installed to prevent caving of trench walls?

The term used to describe a framework of wood or metal installed to prevent the caving of trench walls is "shoring." Shoring is a critical safety measure used in construction and excavation to support structures and prevent ground movement during the dig. It involves the installation of temporary supports that stabilize the walls of a trench, ensuring that they do not collapse and pose a hazard to workers or equipment.

Shoring techniques can vary, including vertical shores that are directly underneath the load and lateral braces that help stabilize the sides of the excavation. Utilizing proper shoring methods is crucial for safe excavation operations, reducing the risk of trench-related accidents and ensuring that work can proceed effectively and securely.

Other terms like scaffolding, formwork, and bracing have distinct definitions and applications in construction practices, but they do not specifically refer to the prevention of trench wall cave-ins. Scaffolding supports workers and materials above ground, formwork creates molds for poured concrete, and bracing typically refers to diagonal supports used in various structures.