The correct answer is: A. Sway bracing
Sway bracing is a type of bracing that is used to prevent a structure from swaying or collapsing. It is typically installed in the plane of the end posts, and can be made of a variety of materials, including wood, steel, and concrete.
Sway bracing is important because it helps to keep a structure stable and secure. Without sway bracing, a structure could be more likely to collapse in the event of an earthquake, high winds, or other severe weather conditions.
Here is a brief explanation of each option:
- Portal bracing is a type of bracing that is used to resist lateral loads. It is typically installed in the plane of the roof trusses, and can be made of a variety of materials, including wood, steel, and concrete.
- Top lateral bracing is a type of bracing that is used to resist lateral loads. It is typically installed at the top of a structure, and can be made of a variety of materials, including wood, steel, and concrete.
- Bottom lateral bracing is a type of bracing that is used to resist lateral loads. It is typically installed at the bottom of a structure, and can be made of a variety of materials, including wood, steel, and concrete.