Which type of stay is typically used diagonally across a structure?

The choice of a diagonal stay is correct because it is specifically designed to provide support across a structure, which allows for effective stabilization and load distribution. Diagonal stays are typically used to counteract lateral forces and maintain the integrity of the structure, especially in scenarios where lateral stability is crucial.

The design of a diagonal stay helps in minimizing deformation and prevents buckling by transferring forces at an angle, thereby enhancing the overall strength of the framework. This configuration is often applied in various engineering applications, particularly in bridges and towers, where diagonal bracing significantly augments stability.

Other types of stays, such as stay bolts or through stays, serve different purposes and may not provide the same kind of diagonal support needed for lateral reinforcement. Similarly, gusset stays are component parts designed to connect different elements of a structure but do not primarily focus on diagonal support. Therefore, the diagonal stay stands out as the optimal choice for this specific requirement.