Which of the following is a key factor when selecting shoring systems for stability?

When selecting shoring systems for stability, the distance between supports is a crucial factor because it directly influences the weight distribution and the overall stability of the structure being supported. A greater distance between supports can increase the likelihood of failure, as the materials may not be able to adequately manage the load without bending, buckling, or collapsing. Proper spacing ensures that loads are distributed evenly across the supports, reducing the risk of structural failure during rescue operations or stabilization efforts.

While the type of material, environmental conditions, and load-bearing capacity are important considerations in the selection of shoring systems, they do not have as direct an effect on the immediate structural integrity as the spacing of supports. For instance, even the strongest materials can fail if they are improperly spaced, and environmental conditions may further exacerbate issues caused by inadequate support spacing. Thus, ensuring that supports are placed at appropriate distances is fundamental for maintaining stability and safety in shoring systems used in structural collapse scenarios.