What is the main function of the horizontal members known as cross braces?

The main function of cross braces is to stabilize excavation walls. These horizontal members provide structural support and prevent the walls from collapsing under the weight of the surrounding soil, especially during digging operations. By effectively distributing forces and reducing lateral pressure, cross braces play a critical role in maintaining the safety and integrity of excavated areas.

While connecting multiple excavations or supporting rail systems are important aspects of construction operations, those functions do not specifically pertain to the primary purpose of cross braces. Similarly, while enhancing load-bearing capacity of soil is a consideration in excavation, cross braces directly contribute more towards stabilization rather than affecting the soil's inherent capacity.