What is the primary function of a strongback in shoring?

The primary function of a strongback in shoring is to provide strength and stability. Strongbacks are structural members used in shoring systems to enhance the overall stability of the setup during construction or repair work. They do this by distributing the load over a larger area and ensuring that the shoring components remain aligned and secured. The effective use of a strongback prevents the shoring system from shifting or collapsing under pressure, significantly increasing safety in construction environments.

The other options, while relevant to different aspects of construction or shoring, do not accurately represent the primary purpose of a strongback. A strongback does not serve primarily to connect various shoring components, nor is it used as a cushioning material or for assisting in drilling. Each of those activities might involve other components or materials tailored to those specific needs in construction.