Answer:
The type of system that uses uprights, wales, and cross braces to support walls is called a scaffolding system. It is commonly used in construction and allows workers to access different levels of a building or structure safely. The uprights are vertical members that provide the main support, while the wales are horizontal members that connect the uprights. Cross braces are diagonal members that help to stabilize the scaffolding and prevent it from swaying or collapsing. This system provides a stable and secure platform for workers to perform their tasks at elevated heights.
