What is the slope ratio for Type C soil?

The slope ratio for Type C soil is 1.5:1. This means that for every 1.5 units of horizontal distance, the slope rises 1 unit vertically. Type C soils are classified as the least stable of the three soil types, which includes Type A (the most stable) and Type B (moderately stable). The 1.5:1 slope ratio is a requirement set by OSHA (Occupational Safety and Health Administration) for excavations involving Type C soils to minimize the risk of collapse and ensure safety when workers are in the trench.

This slope ratio indicates a precautionary approach to ensure safe excavation practices in less stable conditions. Understanding the characteristics of Type C soil and its required slope ratios is essential for any professional involved in excavation and hoisting operations, helping to establish proper safety protocols and prevent incidents.