No person shall enter any excavation over what height unless the sides are sloped to a safe angle or supported?

• A. 2 feet
• B. 4 feet
• C. 6 feet
• D. 8 feet

Answer: (B)

The requirement that no person shall enter any excavation over a certain height unless it is either sloped to a safe angle or properly supported is primarily based on safety regulations designed to prevent hazards such as cave-ins. The specific height of 4 feet is significant because it reflects the common industry standards meant to ensure that workers are not exposed to the risks associated with working in excavations that exceed this height without appropriate safety measures.

When excavations reach 4 feet, the risk of collapse increases, which is why regulations mandate slope or support at this level. This measure is vital for worker safety, as the weight of the soil can cause serious accidents if the trench or excavation is not properly managed. Understanding this height threshold helps reinforce the importance of vigilance in excavation safety practices within mining operations and other construction environments.