Designs for sloping or benching systems must be in accordance with which type of data?

The correct answer is tabulated data because it encompasses pre-established guidelines regarding the design and engineering of sloping or benching systems in excavation work. Tabulated data provides crucial safety factors that have been derived from empirical studies and analyses. This data helps identify appropriate angles and dimensions for slopes and benches based on soil type, load conditions, and other factors that affect the stability and safety of the excavation site.

Relying on tabulated data is critical, as it ensures that any design implemented adheres to industry standards and best practices, mitigating the risk of collapses or accidents.

Unique design standards, while potentially useful, may not be based on comprehensive empirical evidence and could vary greatly between projects, which may lead to unsafe conditions if not rigorously tested. Mobile unit guidelines generally pertain to equipment operation rather than the specific designs for sloping or benching systems. Standard building codes typically cover broader construction practices and may not address the specificities of excavation design, thus can fall short of the detailed parameters established in tabulated data.