What is a key requirement for installing support systems during excavation?

The key requirement for installing support systems during excavation revolves around ensuring safety and preventing structural collapses. Properly installed support systems, such as shoring or bracing, provide the necessary structural integrity to prevent the surrounding soil from collapsing into the excavation site. This is critical for the safety of workers in and around the excavation, as well as for maintaining the structural stability of adjacent structures and roadways.

Support systems must be carefully designed and implemented in accordance with safety regulations and engineering standards. By adhering to this practice, operators mitigate risks associated with excavation work, ensuring that the site remains safe for operation throughout the duration of the project.

The other choices suggest practices that could lead to unsafe conditions, such as involving inexperienced workers in critical tasks or disregarding necessary safety protocols.