What are uprights used for in a shoring system?

Uprights in a shoring system are essential components that serve to hold planks against sheeting, which adds stability and strength to the structure. In trenching and excavation, the primary purpose of shoring is to prevent collapses and ensure the safety of workers in the area. By utilizing uprights effectively, the system can distribute loads more evenly and prevent the sides of the trench from caving in. This function is crucial in maintaining structural integrity and adhering to safety standards, making uprights a key part of a well-designed shoring system.

The other choices do not accurately describe the practical application of uprights in shoring. They may imply elements of construction that are not relevant to the primary safety function that uprights serve.